New docs for Thread.java, and little tweaks identified by japi.
From-SVN: r63284
This commit is contained in:
Anthony Green
Anthony Green
parent
764c441479
commit
514e19c9fb
@ -1,3 +1,11 @@
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2002-02-21 Anthony Green <green@redhat.com>
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* java/lang/Thread.java (Thread): New constructor taking stack
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size parameter (ignored for now).
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* Many methods: Merged GNU Classpath documentation.
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* java/lang/Class.java (finalize): throws a Throwable.
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2003-02-21 Mark Wielaard <mark@klomp.org>
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* java/util/zip/ZipEntry.java (setComment): Don't check length when
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@ -1,6 +1,6 @@
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// Class.java - Representation of a Java class.
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/* Copyright (C) 1998, 1999, 2000, 2002 Free Software Foundation
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/* Copyright (C) 1998, 1999, 2000, 2002, 2003 Free Software Foundation
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This file is part of libgcj.
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@ -346,7 +346,7 @@ public final class Class implements Serializable
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private native void initializeClass ();
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// finalization
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protected native void finalize ();
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protected native void finalize () throws Throwable;
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/**
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* Strip the last portion of the name (after the last dot).
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@ -1,6 +1,6 @@
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// Thread.java - Thread class.
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/* Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation
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/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation
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This file is part of libgcj.
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@ -12,30 +12,84 @@ package java.lang;
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import gnu.gcj.RawData;
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/**
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* @author Tom Tromey <tromey@cygnus.com>
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* @date August 24, 1998
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*/
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/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
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* "The Java Language Specification", ISBN 0-201-63451-1
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* plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
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* Status: Believed complete to version 1.3, with caveats. We do not
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* Status: Believed complete to version 1.4, with caveats. We do not
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* implement the deprecated (and dangerous) stop, suspend, and resume
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* methods. Security implementation is not complete.
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*/
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/**
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* Thread represents a single thread of execution in the VM. When an
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* application VM starts up, it creates a non-daemon Thread which calls the
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* main() method of a particular class. There may be other Threads running,
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* such as the garbage collection thread.
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*
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* <p>Threads have names to identify them. These names are not necessarily
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* unique. Every Thread has a priority, as well, which tells the VM which
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* Threads should get more running time. New threads inherit the priority
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* and daemon status of the parent thread, by default.
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*
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* <p>There are two methods of creating a Thread: you may subclass Thread and
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* implement the <code>run()</code> method, at which point you may start the
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* Thread by calling its <code>start()</code> method, or you may implement
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* <code>Runnable</code> in the class you want to use and then call new
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* <code>Thread(your_obj).start()</code>.
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*
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* <p>The virtual machine runs until all non-daemon threads have died (either
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* by returning from the run() method as invoked by start(), or by throwing
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* an uncaught exception); or until <code>System.exit</code> is called with
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* adequate permissions.
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*
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* <p>It is unclear at what point a Thread should be added to a ThreadGroup,
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* and at what point it should be removed. Should it be inserted when it
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* starts, or when it is created? Should it be removed when it is suspended
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* or interrupted? The only thing that is clear is that the Thread should be
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* removed when it is stopped.
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*
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* @author Tom Tromey
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* @author John Keiser
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* @author Eric Blake <ebb9@email.byu.edu>
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* @see Runnable
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* @see Runtime#exit(int)
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* @see #run()
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* @see #start()
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* @see ThreadLocal
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* @since 1.0
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* @status updated to 1.4
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*/
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public class Thread implements Runnable
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{
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/** The maximum priority for a Thread. */
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public final static int MAX_PRIORITY = 10;
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/** The minimum priority for a Thread. */
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public final static int MIN_PRIORITY = 1;
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/** The priority a Thread gets by default. */
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public final static int NORM_PRIORITY = 5;
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/**
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* Get the number of active threads in the current Thread's ThreadGroup.
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* This implementation calls
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* <code>currentThread().getThreadGroup().activeCount()</code>.
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*
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* @return the number of active threads in the current ThreadGroup
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* @see ThreadGroup#activeCount()
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*/
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public static int activeCount ()
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{
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return currentThread().getThreadGroup().activeCount();
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}
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/**
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* Check whether the current Thread is allowed to modify this Thread. This
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* passes the check on to <code>SecurityManager.checkAccess(this)</code>.
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*
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* @throws SecurityException if the current Thread cannot modify this Thread
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* @see SecurityManager#checkAccess(Thread)
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*/
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public final void checkAccess ()
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{
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SecurityManager s = System.getSecurityManager();
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@ -43,78 +97,218 @@ public class Thread implements Runnable
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s.checkAccess(this);
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}
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/**
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* Count the number of stack frames in this Thread. The Thread in question
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* must be suspended when this occurs.
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*
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* @return the number of stack frames in this Thread
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* @throws IllegalThreadStateException if this Thread is not suspended
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* @deprecated pointless, since suspend is deprecated
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*/
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public native int countStackFrames ();
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/**
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* Get the currently executing Thread.
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*
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* @return the currently executing Thread
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*/
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public static native Thread currentThread ();
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/**
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* Originally intended to destroy this thread, this method was never
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* implemented by Sun, and is hence a no-op.
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*/
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public native void destroy ();
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/**
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* Print a stack trace of the current thread to stderr using the same
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* format as Throwable's printStackTrace() method.
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*
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* @see Throwable#printStackTrace()
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*/
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public static void dumpStack ()
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{
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(new Exception ("Stack trace")).printStackTrace ();
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}
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/**
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* Copy every active thread in the current Thread's ThreadGroup into the
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* array. Extra threads are silently ignored. This implementation calls
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* <code>getThreadGroup().enumerate(array)</code>, which may have a
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* security check, <code>checkAccess(group)</code>.
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*
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* @param array the array to place the Threads into
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* @return the number of Threads placed into the array
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* @throws NullPointerException if array is null
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* @throws SecurityException if you cannot access the ThreadGroup
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* @see ThreadGroup#enumerate(Thread[])
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* @see #activeCount()
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* @see SecurityManager#checkAccess(ThreadGroup)
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*/
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public static int enumerate (Thread[] threads)
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{
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return currentThread().group.enumerate(threads);
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}
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/**
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* Get this Thread's name.
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*
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* @return this Thread's name
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*/
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public final String getName ()
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{
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return name;
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}
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/**
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* Get this Thread's priority.
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*
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* @return the Thread's priority
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*/
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public final int getPriority ()
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{
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return priority;
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}
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/**
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* Get the ThreadGroup this Thread belongs to. If the thread has died, this
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* returns null.
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*
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* @return this Thread's ThreadGroup
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*/
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public final ThreadGroup getThreadGroup ()
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{
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return group;
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}
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/**
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* Interrupt this Thread. First, there is a security check,
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* <code>checkAccess</code>. Then, depending on the current state of the
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* thread, various actions take place:
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*
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* <p>If the thread is waiting because of {@link #wait()},
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* {@link #sleep(long)}, or {@link #join()}, its <i>interrupt status</i>
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* will be cleared, and an InterruptedException will be thrown. Notice that
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* this case is only possible if an external thread called interrupt().
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*
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* <p>If the thread is blocked in an interruptible I/O operation, in
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* {@link java.nio.channels.InterruptibleChannel}, the <i>interrupt
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* status</i> will be set, and ClosedByInterruptException will be thrown.
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*
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* <p>If the thread is blocked on a {@link java.nio.channels.Selector}, the
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* <i>interrupt status</i> will be set, and the selection will return, with
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* a possible non-zero value, as though by the wakeup() method.
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*
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* <p>Otherwise, the interrupt status will be set.
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*
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* @throws SecurityException if you cannot modify this Thread
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*/
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public native void interrupt ();
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/**
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* Determine whether the current Thread has been interrupted, and clear
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* the <i>interrupted status</i> in the process.
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*
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* @return whether the current Thread has been interrupted
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* @see #isInterrupted()
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*/
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public static boolean interrupted ()
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{
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return currentThread().isInterrupted (true);
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}
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// Check the threads interrupted status. Note that this does not clear the
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// thread's interrupted status (per JDK 1.2 online API documentation).
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/**
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* Determine whether the given Thread has been interrupted, but leave
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* the <i>interrupted status</i> alone in the process.
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*
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* @return whether the current Thread has been interrupted
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* @see #interrupted()
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*/
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public boolean isInterrupted ()
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{
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return interrupt_flag;
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}
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/**
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* Determine whether this Thread is alive. A thread which is alive has
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* started and not yet died.
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*
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* @return whether this Thread is alive
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*/
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public final boolean isAlive ()
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{
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return alive_flag;
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}
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/**
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* Tell whether this is a daemon Thread or not.
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*
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* @return whether this is a daemon Thread or not
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* @see #setDaemon(boolean)
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*/
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public final boolean isDaemon ()
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{
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return daemon_flag;
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}
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/**
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* Wait forever for the Thread in question to die.
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*
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* @throws InterruptedException if the Thread is interrupted; it's
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* <i>interrupted status</i> will be cleared
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*/
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public final void join () throws InterruptedException
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{
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join (0, 0);
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}
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/**
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* Wait the specified amount of time for the Thread in question to die.
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*
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* @param ms the number of milliseconds to wait, or 0 for forever
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* @throws InterruptedException if the Thread is interrupted; it's
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* <i>interrupted status</i> will be cleared
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*/
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public final void join (long timeout) throws InterruptedException
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{
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join (timeout, 0);
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}
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/**
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* Wait the specified amount of time for the Thread in question to die.
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*
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* <p>Note that 1,000,000 nanoseconds == 1 millisecond, but most VMs do
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* not offer that fine a grain of timing resolution. Besides, there is
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* no guarantee that this thread can start up immediately when time expires,
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* because some other thread may be active. So don't expect real-time
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* performance.
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*
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* @param ms the number of milliseconds to wait, or 0 for forever
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* @param ns the number of extra nanoseconds to sleep (0-999999)
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* @throws InterruptedException if the Thread is interrupted; it's
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* <i>interrupted status</i> will be cleared
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* @throws IllegalArgumentException if ns is invalid
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* @XXX A ThreadListener would be nice, to make this efficient.
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*/
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public final native void join (long timeout, int nanos)
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throws InterruptedException;
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/**
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* Resume a suspended thread.
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*
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* @see #resume()
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*/
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public final native void resume ();
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private final native void finish_ ();
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// Check the thread's interrupted status. If clear_flag is true, the
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// thread's interrupted status is also cleared.
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/**
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* Determine whether the given Thread has been interrupted, but leave
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* the <i>interrupted status</i> alone in the process.
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*
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* @return whether the current Thread has been interrupted
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* @see #interrupted()
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*/
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private boolean isInterrupted (boolean clear_flag)
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{
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boolean r = interrupt_flag;
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@ -128,12 +322,31 @@ public class Thread implements Runnable
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return r;
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}
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/**
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* The method of Thread that will be run if there is no Runnable object
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* associated with the Thread. Thread's implementation does nothing at all.
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*
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* @see #start()
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* @see #Thread(ThreadGroup, Runnable, String)
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*/
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public void run ()
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{
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if (runnable != null)
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runnable.run();
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}
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/**
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* Set the daemon status of this Thread. If this is a daemon Thread, then
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* the VM may exit even if it is still running. This may only be called
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* before the Thread starts running. There may be a security check,
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* <code>checkAccess</code>.
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*
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* @param daemon whether this should be a daemon thread or not
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* @throws SecurityException if you cannot modify this Thread
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* @throws IllegalThreadStateException if the Thread is active
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* @see #isDaemon()
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* @see #checkAccess()
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*/
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public final void setDaemon (boolean status)
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{
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checkAccess ();
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@ -142,6 +355,20 @@ public class Thread implements Runnable
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daemon_flag = status;
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}
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/**
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* Returns the context classloader of this Thread. The context
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* classloader can be used by code that want to load classes depending
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* on the current thread. Normally classes are loaded depending on
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* the classloader of the current class. There may be a security check
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* for <code>RuntimePermission("getClassLoader")</code> if the caller's
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* class loader is not null or an ancestor of this thread's context class
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* loader.
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*
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* @return the context class loader
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* @throws SecurityException when permission is denied
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* @see setContextClassLoader(ClassLoader)
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* @since 1.2
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*/
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public synchronized ClassLoader getContextClassLoader()
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{
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if (context_class_loader == null)
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@ -168,6 +395,20 @@ public class Thread implements Runnable
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return context_class_loader;
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}
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/**
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* Returns the context classloader of this Thread. The context
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* classloader can be used by code that want to load classes depending
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* on the current thread. Normally classes are loaded depending on
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* the classloader of the current class. There may be a security check
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* for <code>RuntimePermission("getClassLoader")</code> if the caller's
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* class loader is not null or an ancestor of this thread's context class
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* loader.
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*
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* @return the context class loader
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* @throws SecurityException when permission is denied
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* @see setContextClassLoader(ClassLoader)
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* @since 1.2
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*/
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public synchronized void setContextClassLoader(ClassLoader cl)
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{
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SecurityManager s = System.getSecurityManager ();
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@ -176,6 +417,14 @@ public class Thread implements Runnable
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context_class_loader = cl;
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}
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/**
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* Set this Thread's name. There may be a security check,
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* <code>checkAccess</code>.
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*
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* @param name the new name for this Thread
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* @throws NullPointerException if name is null
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* @throws SecurityException if you cannot modify this Thread
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*/
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public final void setName (String n)
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{
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checkAccess ();
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@ -186,17 +435,98 @@ public class Thread implements Runnable
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name = n;
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}
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/**
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* Set this Thread's priority. There may be a security check,
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* <code>checkAccess</code>, then the priority is set to the smaller of
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* priority and the ThreadGroup maximum priority.
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*
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* @param priority the new priority for this Thread
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* @throws IllegalArgumentException if priority exceeds MIN_PRIORITY or
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* MAX_PRIORITY
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* @throws SecurityException if you cannot modify this Thread
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* @see #getPriority()
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* @see #checkAccess()
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* @see ThreadGroup#getMaxPriority()
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* @see #MIN_PRIORITY
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* @see #MAX_PRIORITY
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*/
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public final native void setPriority (int newPriority);
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/**
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* Suspend the current Thread's execution for the specified amount of
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* time. The Thread will not lose any locks it has during this time. There
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* are no guarantees which thread will be next to run, but most VMs will
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* choose the highest priority thread that has been waiting longest.
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*
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* @param ms the number of milliseconds to sleep, or 0 for forever
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* @throws InterruptedException if the Thread is interrupted; it's
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* <i>interrupted status</i> will be cleared
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* @see #notify()
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* @see #wait(long)
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*/
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public static void sleep (long timeout) throws InterruptedException
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{
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sleep (timeout, 0);
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}
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|
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/**
|
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* Suspend the current Thread's execution for the specified amount of
|
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* time. The Thread will not lose any locks it has during this time. There
|
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* are no guarantees which thread will be next to run, but most VMs will
|
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* choose the highest priority thread that has been waiting longest.
|
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*
|
||||
* <p>Note that 1,000,000 nanoseconds == 1 millisecond, but most VMs do
|
||||
* not offer that fine a grain of timing resolution. Besides, there is
|
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* no guarantee that this thread can start up immediately when time expires,
|
||||
* because some other thread may be active. So don't expect real-time
|
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* performance.
|
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*
|
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* @param ms the number of milliseconds to sleep, or 0 for forever
|
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* @param ns the number of extra nanoseconds to sleep (0-999999)
|
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* @throws InterruptedException if the Thread is interrupted; it's
|
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* <i>interrupted status</i> will be cleared
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* @throws IllegalArgumentException if ns is invalid
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* @see #notify()
|
||||
* @see #wait(long, int)
|
||||
*/
|
||||
public static native void sleep (long timeout, int nanos)
|
||||
throws InterruptedException;
|
||||
|
||||
/**
|
||||
* Start this Thread, calling the run() method of the Runnable this Thread
|
||||
* was created with, or else the run() method of the Thread itself. This
|
||||
* is the only way to start a new thread; calling run by yourself will just
|
||||
* stay in the same thread. The virtual machine will remove the thread from
|
||||
* its thread group when the run() method completes.
|
||||
*
|
||||
* @throws IllegalThreadStateException if the thread has already started
|
||||
* @see #run()
|
||||
*/
|
||||
public native void start ();
|
||||
|
||||
/**
|
||||
* Cause this Thread to stop abnormally because of the throw of a ThreadDeath
|
||||
* error. If you stop a Thread that has not yet started, it will stop
|
||||
* immediately when it is actually started.
|
||||
*
|
||||
* <p>This is inherently unsafe, as it can interrupt synchronized blocks and
|
||||
* leave data in bad states. Hence, there is a security check:
|
||||
* <code>checkAccess(this)</code>, plus another one if the current thread
|
||||
* is not this: <code>RuntimePermission("stopThread")</code>. If you must
|
||||
* catch a ThreadDeath, be sure to rethrow it after you have cleaned up.
|
||||
* ThreadDeath is the only exception which does not print a stack trace when
|
||||
* the thread dies.
|
||||
*
|
||||
* @throws SecurityException if you cannot stop the Thread
|
||||
* @see #interrupt()
|
||||
* @see #checkAccess()
|
||||
* @see #start()
|
||||
* @see ThreadDeath
|
||||
* @see ThreadGroup#uncaughtException(Thread, Throwable)
|
||||
* @see SecurityManager#checkAccess(Thread)
|
||||
* @see SecurityManager#checkPermission(Permission)
|
||||
* @deprecated unsafe operation, try not to use
|
||||
*/
|
||||
public final void stop ()
|
||||
{
|
||||
// Argument doesn't matter, because this is no longer
|
||||
@ -204,13 +534,82 @@ public class Thread implements Runnable
|
||||
stop (null);
|
||||
}
|
||||
|
||||
/**
|
||||
* Cause this Thread to stop abnormally and throw the specified exception.
|
||||
* If you stop a Thread that has not yet started, it will stop immediately
|
||||
* when it is actually started. <b>WARNING</b>This bypasses Java security,
|
||||
* and can throw a checked exception which the call stack is unprepared to
|
||||
* handle. Do not abuse this power.
|
||||
*
|
||||
* <p>This is inherently unsafe, as it can interrupt synchronized blocks and
|
||||
* leave data in bad states. Hence, there is a security check:
|
||||
* <code>checkAccess(this)</code>, plus another one if the current thread
|
||||
* is not this: <code>RuntimePermission("stopThread")</code>. If you must
|
||||
* catch a ThreadDeath, be sure to rethrow it after you have cleaned up.
|
||||
* ThreadDeath is the only exception which does not print a stack trace when
|
||||
* the thread dies.
|
||||
*
|
||||
* @param t the Throwable to throw when the Thread dies
|
||||
* @throws SecurityException if you cannot stop the Thread
|
||||
* @throws NullPointerException in the calling thread, if t is null
|
||||
* @see #interrupt()
|
||||
* @see #checkAccess()
|
||||
* @see #start()
|
||||
* @see ThreadDeath
|
||||
* @see ThreadGroup#uncaughtException(Thread, Throwable)
|
||||
* @see SecurityManager#checkAccess(Thread)
|
||||
* @see SecurityManager#checkPermission(Permission)
|
||||
* @deprecated unsafe operation, try not to use
|
||||
*/
|
||||
public final native void stop (Throwable e);
|
||||
|
||||
/**
|
||||
* Suspend this Thread. It will not come back, ever, unless it is resumed.
|
||||
*
|
||||
* <p>This is inherently unsafe, as the suspended thread still holds locks,
|
||||
* and can potentially deadlock your program. Hence, there is a security
|
||||
* check: <code>checkAccess</code>.
|
||||
*
|
||||
* @throws SecurityException if you cannot suspend the Thread
|
||||
* @see #checkAccess()
|
||||
* @see #resume()
|
||||
* @deprecated unsafe operation, try not to use
|
||||
*/
|
||||
public final native void suspend ();
|
||||
|
||||
private final native void initialize_native ();
|
||||
|
||||
private final native static String gen_name ();
|
||||
|
||||
/**
|
||||
* Allocate a new Thread object, with the specified ThreadGroup and name, and
|
||||
* using the specified Runnable object's <code>run()</code> method to
|
||||
* execute. If the Runnable object is null, <code>this</code> (which is
|
||||
* a Runnable) is used instead.
|
||||
*
|
||||
* <p>If the ThreadGroup is null, the security manager is checked. If a
|
||||
* manager exists and returns a non-null object for
|
||||
* <code>getThreadGroup</code>, that group is used; otherwise the group
|
||||
* of the creating thread is used. Note that the security manager calls
|
||||
* <code>checkAccess</code> if the ThreadGroup is not null.
|
||||
*
|
||||
* <p>The new Thread will inherit its creator's priority and daemon status.
|
||||
* These can be changed with <code>setPriority</code> and
|
||||
* <code>setDaemon</code>.
|
||||
*
|
||||
* @param group the group to put the Thread into
|
||||
* @param target the Runnable object to execute
|
||||
* @param name the name for the Thread
|
||||
* @throws NullPointerException if name is null
|
||||
* @throws SecurityException if this thread cannot access <code>group</code>
|
||||
* @throws IllegalThreadStateException if group is destroyed
|
||||
* @see Runnable#run()
|
||||
* @see #run()
|
||||
* @see #setDaemon(boolean)
|
||||
* @see #setPriority(int)
|
||||
* @see SecurityManager#checkAccess(ThreadGroup)
|
||||
* @see ThreadGroup#checkAccess()
|
||||
*/
|
||||
public Thread (ThreadGroup g, Runnable r, String n)
|
||||
{
|
||||
this (currentThread (), g, r, n);
|
||||
@ -221,6 +620,37 @@ public class Thread implements Runnable
|
||||
throw new NullPointerException ();
|
||||
}
|
||||
|
||||
/**
|
||||
* Allocate a new Thread object, as if by
|
||||
* <code>Thread(group, null, name)</code>, and give it the specified stack
|
||||
* size, in bytes. The stack size is <b>highly platform independent</b>,
|
||||
* and the virtual machine is free to round up or down, or ignore it
|
||||
* completely. A higher value might let you go longer before a
|
||||
* <code>StackOverflowError</code>, while a lower value might let you go
|
||||
* longer before an <code>OutOfMemoryError</code>. Or, it may do absolutely
|
||||
* nothing! So be careful, and expect to need to tune this value if your
|
||||
* virtual machine even supports it.
|
||||
*
|
||||
* @param group the group to put the Thread into
|
||||
* @param target the Runnable object to execute
|
||||
* @param name the name for the Thread
|
||||
* @param size the stack size, in bytes; 0 to be ignored
|
||||
* @throws NullPointerException if name is null
|
||||
* @throws SecurityException if this thread cannot access <code>group</code>
|
||||
* @throws IllegalThreadStateException if group is destroyed
|
||||
* @since 1.4
|
||||
*/
|
||||
public Thread (ThreadGroup g, Runnable r, String n, long size)
|
||||
{
|
||||
// Just ignore stackSize for now.
|
||||
this (currentThread (), g, r, n);
|
||||
|
||||
// The Class Libraries book says ``threadName cannot be null''. I
|
||||
// take this to mean NullPointerException.
|
||||
if (n == null)
|
||||
throw new NullPointerException ();
|
||||
}
|
||||
|
||||
private Thread (Thread current, ThreadGroup g, Runnable r, String n)
|
||||
{
|
||||
if (g == null)
|
||||
@ -264,42 +694,152 @@ public class Thread implements Runnable
|
||||
initialize_native ();
|
||||
}
|
||||
|
||||
/**
|
||||
* Allocates a new <code>Thread</code> object. This constructor has
|
||||
* the same effect as <code>Thread(null, null,</code>
|
||||
* <i>gname</i><code>)</code>, where <b><i>gname</i></b> is
|
||||
* a newly generated name. Automatically generated names are of the
|
||||
* form <code>"Thread-"+</code><i>n</i>, where <i>n</i> is an integer.
|
||||
* <p>
|
||||
* Threads created this way must have overridden their
|
||||
* <code>run()</code> method to actually do anything. An example
|
||||
* illustrating this method being used follows:
|
||||
* <p><blockquote><pre>
|
||||
* import java.lang.*;
|
||||
*
|
||||
* class plain01 implements Runnable {
|
||||
* String name;
|
||||
* plain01() {
|
||||
* name = null;
|
||||
* }
|
||||
* plain01(String s) {
|
||||
* name = s;
|
||||
* }
|
||||
* public void run() {
|
||||
* if (name == null)
|
||||
* System.out.println("A new thread created");
|
||||
* else
|
||||
* System.out.println("A new thread with name " + name +
|
||||
* " created");
|
||||
* }
|
||||
* }
|
||||
* class threadtest01 {
|
||||
* public static void main(String args[] ) {
|
||||
* int failed = 0 ;
|
||||
*
|
||||
* <b>Thread t1 = new Thread();</b>
|
||||
* if (t1 != null)
|
||||
* System.out.println("new Thread() succeed");
|
||||
* else {
|
||||
* System.out.println("new Thread() failed");
|
||||
* failed++;
|
||||
* }
|
||||
* }
|
||||
* }
|
||||
* </pre></blockquote>
|
||||
*
|
||||
* @see java.lang.Thread#Thread(java.lang.ThreadGroup,
|
||||
* java.lang.Runnable, java.lang.String)
|
||||
*/
|
||||
public Thread ()
|
||||
{
|
||||
this (null, null, gen_name ());
|
||||
}
|
||||
|
||||
/**
|
||||
* Allocates a new <code>Thread</code> object. This constructor has
|
||||
* the same effect as <code>Thread(null, target,</code>
|
||||
* <i>gname</i><code>)</code>, where <i>gname</i> is
|
||||
* a newly generated name. Automatically generated names are of the
|
||||
* form <code>"Thread-"+</code><i>n</i>, where <i>n</i> is an integer.
|
||||
*
|
||||
* @param target the object whose <code>run</code> method is called.
|
||||
* @see java.lang.Thread#Thread(java.lang.ThreadGroup,
|
||||
* java.lang.Runnable, java.lang.String)
|
||||
*/
|
||||
public Thread (Runnable r)
|
||||
{
|
||||
this (null, r, gen_name ());
|
||||
}
|
||||
|
||||
/**
|
||||
* Allocates a new <code>Thread</code> object. This constructor has
|
||||
* the same effect as <code>Thread(null, null, name)</code>.
|
||||
*
|
||||
* @param name the name of the new thread.
|
||||
* @see java.lang.Thread#Thread(java.lang.ThreadGroup,
|
||||
* java.lang.Runnable, java.lang.String)
|
||||
*/
|
||||
public Thread (String n)
|
||||
{
|
||||
this (null, null, n);
|
||||
}
|
||||
|
||||
/**
|
||||
* Allocates a new <code>Thread</code> object. This constructor has
|
||||
* the same effect as <code>Thread(group, target,</code>
|
||||
* <i>gname</i><code>)</code>, where <i>gname</i> is
|
||||
* a newly generated name. Automatically generated names are of the
|
||||
* form <code>"Thread-"+</code><i>n</i>, where <i>n</i> is an integer.
|
||||
*
|
||||
* @param group the thread group.
|
||||
* @param target the object whose <code>run</code> method is called.
|
||||
* @exception SecurityException if the current thread cannot create a
|
||||
* thread in the specified thread group.
|
||||
* @see java.lang.Thread#Thread(java.lang.ThreadGroup,
|
||||
* java.lang.Runnable, java.lang.String)
|
||||
*/
|
||||
public Thread (ThreadGroup g, Runnable r)
|
||||
{
|
||||
this (g, r, gen_name ());
|
||||
}
|
||||
|
||||
/**
|
||||
* Allocates a new <code>Thread</code> object. This constructor has
|
||||
* the same effect as <code>Thread(group, null, name)</code>
|
||||
*
|
||||
* @param group the thread group.
|
||||
* @param name the name of the new thread.
|
||||
* @exception SecurityException if the current thread cannot create a
|
||||
* thread in the specified thread group.
|
||||
* @see java.lang.Thread#Thread(java.lang.ThreadGroup,
|
||||
* java.lang.Runnable, java.lang.String)
|
||||
*/
|
||||
public Thread (ThreadGroup g, String n)
|
||||
{
|
||||
this (g, null, n);
|
||||
}
|
||||
|
||||
/**
|
||||
* Allocates a new <code>Thread</code> object. This constructor has
|
||||
* the same effect as <code>Thread(null, target, name)</code>.
|
||||
*
|
||||
* @param target the object whose <code>run</code> method is called.
|
||||
* @param name the name of the new thread.
|
||||
* @see java.lang.Thread#Thread(java.lang.ThreadGroup,
|
||||
* java.lang.Runnable, java.lang.String)
|
||||
*/
|
||||
public Thread (Runnable r, String n)
|
||||
{
|
||||
this (null, r, n);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a string representation of this thread, including the
|
||||
* thread's name, priority, and thread group.
|
||||
*
|
||||
* @return a string representation of this thread.
|
||||
*/
|
||||
public String toString ()
|
||||
{
|
||||
return "Thread[" + name + "," + priority + "," +
|
||||
(group == null ? "" : group.getName()) + "]";
|
||||
}
|
||||
|
||||
/**
|
||||
* Causes the currently executing thread object to temporarily pause
|
||||
* and allow other threads to execute.
|
||||
*/
|
||||
public static native void yield ();
|
||||
|
||||
// Private data.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user