39 lines
1.2 KiB
Java
39 lines
1.2 KiB
Java
// concurrency/SleepingTask.java
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// ©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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// Calling sleep() to pause for a while.
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import java.util.concurrent.*;
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public class SleepingTask extends LiftOff {
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@Override
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public void run() {
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try {
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while(countDown-- > 0) {
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System.out.print(status());
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// Old-style:
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// Thread.sleep(100);
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// Java 5/6-style:
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TimeUnit.MILLISECONDS.sleep(100);
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}
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} catch(InterruptedException e) {
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System.err.println("Interrupted");
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}
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}
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public static void main(String[] args) {
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ExecutorService exec = Executors.newCachedThreadPool();
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for(int i = 0; i < 5; i++)
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exec.execute(new SleepingTask());
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exec.shutdown();
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}
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}
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/* Output:
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#2(9), #4(9), #3(9), #0(9), #1(9), #2(8), #4(8), #3(8),
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#0(8), #1(8), #4(7), #3(7), #2(7), #1(7), #0(7), #4(6),
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#3(6), #2(6), #0(6), #1(6), #4(5), #2(5), #3(5), #1(5),
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#0(5), #4(4), #2(4), #3(4), #1(4), #0(4), #4(3), #2(3),
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#3(3), #1(3), #0(3), #4(2), #2(2), #3(2), #0(2), #1(2),
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#2(1), #4(1), #3(1), #0(1), #1(1), #2(Liftoff!),
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#4(Liftoff!), #3(Liftoff!), #0(Liftoff!), #1(Liftoff!),
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*/
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