OnJava8-Examples/concurrency/EvenGenerator.java

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// concurrency/EvenGenerator.java
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// <20>2015 MindView LLC: see Copyright.txt
// When threads collide.
public class EvenGenerator extends IntGenerator {
private int currentEvenValue = 0;
@Override
public int next() {
++currentEvenValue; // Danger point here!
++currentEvenValue;
return currentEvenValue;
}
public static void main(String[] args) {
EvenChecker.test(new EvenGenerator());
}
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}
/* Output:
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Press Control-C to exit
1649 not even!
1657 not even!
1655 not even!
1653 not even!
1651 not even!
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*/