32 lines
698 B
Java
32 lines
698 B
Java
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// Test atomic increment via synchronized blocks.
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public class SyncTest implements Runnable {
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static int counter;
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public void run() {
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for (int n = 0; n < 1000000; n++)
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synchronized (SyncTest.class) {
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counter++;
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}
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}
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public static void main(String[] args) {
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SyncTest test = new SyncTest();
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Thread[] thr = new Thread[4];
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for (int n = 0; n < thr.length; n++) {
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thr[n] = new Thread(test);
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thr[n].start();
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}
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for (int n = 0; n < thr.length; n++) {
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try {
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thr[n].join();
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} catch (InterruptedException ex) {
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}
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}
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System.out.println(counter == 1000000 * thr.length ?
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"ok" : "fail: " + counter);
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}
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}
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