アクチュエータExecutor
1、newCachedThreadPool()プログラム実行中に必要数と同じスレッドを作成する2、newFixedThreadPool(int n)一度にn本の固定数のスレッドを予め作成する3、newSingleThreadExecutor()nが1のnewFixedThreadPoolに相当するスレッドを予め作成する
public class E1 implements Runnable {
private static int count = 0;
private final int id = count++;
public E1() {
System. out.println( "E1(" + id + ") start");
}
public void run() {
int i = 3;
while ( i-- > 0) {
System. out.println( "E1(" + id + ") " + (i+1));
Thread. yield();
}
System. out.println( "E1(" + id + ") stop");
}
public static void main(String[] args) {
// ExecutorService executorService = Executors.newCachedThreadPool();
// ExecutorService executorService = Executors.newFixedThreadPool(5);
ExecutorService executorService = Executors.newSingleThreadExecutor();
for( int i = 0; i < 5; i++) {
executorService.execute( new E1());
}
executorService.shutdown();
}
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