21st Chapter Concurrency

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Focus: Blocking and event-driven programming

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There is time to implement the above small example

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Package COM.BINGFA;

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Import java.util.concurrent.*;

Import java.util.*;

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Class Taskwithresult implements Callable<string> {

private int id;

public taskwithresult (int id) {

This.id = ID;

}

Public String call () {

Return "result of Taskwithresult" + ID;

}

}

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public class Callabledemo {

public static void Main (string[] args) {

Executorservice exec = Executors.newcachedthreadpool ();

arraylist<future<string>> results =

New Arraylist<future<string>> ();

for (int i = 0; i <; i++)

Results.add (Exec.submit (New Taskwithresult (i)));

for (future<string> fs:results)

try {

Get () blocks until completion:

System.out.println (Fs.get ());

} catch (Interruptedexception e) {

System.out.println (e);

Return

} catch (Executionexception e) {

System.out.println (e);

} finally {

Exec.shutdown ();

}

}

}/* Output:

Result of Taskwithresult 0

Result of Taskwithresult 1

Result of Taskwithresult 2

Result of Taskwithresult 3

Result of Taskwithresult 4

Result of Taskwithresult 5

Result of Taskwithresult 6

Result of Taskwithresult 7

Result of Taskwithresult 8

Result of Taskwithresult 9

*///:~

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21st Chapter Concurrency