150 lines
2.9 KiB
Java
150 lines
2.9 KiB
Java
/* Copyright (C) 1998, 1999 Red Hat, Inc.
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package java.lang;
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/**
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* @author Andrew Haley <aph@cygnus.com>
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* @date September 25, 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 and correct.
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*/
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public final class Float extends Number
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{
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public static final float MAX_VALUE = 3.4028235e+38f;
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public static final float MIN_VALUE = 1.4e-45f;
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public static final float NEGATIVE_INFINITY = -1.0f/0.0f;
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public static final float POSITIVE_INFINITY = 1.0f/0.0f;
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public static final float NaN = 0.0f/0.0f;
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// This initialization is seemingly circular, but it is accepted
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// by javac, and is handled specially by gcc.
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public static final Class TYPE = float.class;
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private float value;
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public Float (float value)
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{
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this.value = value;
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}
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public Float (double value)
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{
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this.value = (float)value;
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}
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public Float (String s) throws NumberFormatException
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{
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this.value = valueOf (s).floatValue ();
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}
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public String toString ()
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{
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return toString (value);
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}
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public boolean equals (Object obj)
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{
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if (obj == null)
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return false;
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if (!(obj instanceof Float))
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return false;
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Float f = (Float) obj;
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return floatToIntBits (value) == floatToIntBits (f.floatValue ());
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}
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public int hashCode ()
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{
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return floatToIntBits (value);
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}
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public int intValue ()
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{
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return (int) value;
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}
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public long longValue ()
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{
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return (long) value;
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}
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public float floatValue ()
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{
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return (float) value;
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}
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public double doubleValue ()
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{
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return (double) value;
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}
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public byte byteValue ()
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{
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return (byte) value;
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}
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public short shortValue ()
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{
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return (short) value;
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}
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public static String toString (float v)
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{
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return Double.toString ((double) v, true);
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}
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public static Float valueOf (String s) throws NullPointerException,
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NumberFormatException
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{
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if (s == null)
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throw new NullPointerException ();
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return new Float (Double.valueOf (s).floatValue ());
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}
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public boolean isNaN ()
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{
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return isNaN (value);
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}
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public static boolean isNaN (float v)
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{
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int bits = floatToIntBits (v);
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int e = bits & 0x7f800000;
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int f = bits & 0x007fffff;
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return e == 0x7f800000 && f != 0;
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}
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public boolean isInfinite ()
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{
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return isInfinite (value);
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}
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public static boolean isInfinite (float v)
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{
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int bits = floatToIntBits (v);
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int f = bits & 0x7fffffff;
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return f == 0x7f800000;
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}
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public static native int floatToIntBits (float value);
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public static native float intBitsToFloat (int bits);
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}
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