34 lines
866 B
Java
34 lines
866 B
Java
// threads/AtomicityTest.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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import java.util.concurrent.*;
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import onjava.TimedAbort;
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public class AtomicityTest implements Runnable {
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private int i = 0;
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public int getValue() { return i; }
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private synchronized void evenIncrement() { i++; i++; }
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@Override
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public void run() {
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while(true)
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evenIncrement();
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}
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public static void main(String[] args) {
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new TimedAbort(4);
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ExecutorService es = Executors.newCachedThreadPool();
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AtomicityTest at = new AtomicityTest();
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es.execute(at);
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while(true) {
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int val = at.getValue();
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if(val % 2 != 0) {
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System.out.println(val);
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System.exit(0);
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}
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}
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}
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}
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/* Output:
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1
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*/
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