Java线程:线程的调度-优先级

    技术2025-01-06  46

    与线程休眠类似,线程的优先级仍然无法保障线程的执行次序。只不过,优先级高的线程获取CPU资源的概率较大,优先级低的并非没机会执行。   线程的优先级用1-10之间的整数表示,数值越大优先级越高,默认的优先级为5。   在一个线程中开启另外一个新线程,则新开线程称为该线程的子线程,子线程初始优先级与父线程相同。   /** * Java线程:线程的调度-优先级 * * @author leizhimin 2009-11-4 9:02:40 */ public class Test {          public static void main(String[] args) {                 Thread t1 = new MyThread1();                 Thread t2 = new Thread( new MyRunnable());                 t1.setPriority(10);                 t2.setPriority(1);                 t2.start();                 t1.start();         } } class MyThread1 extends Thread {          public void run() {                  for ( int i = 0; i < 10; i++) {                         System.out.println( "线程1第" + i + "次执行!");                          try {                                 Thread.sleep(100);                         } catch (InterruptedException e) {                                 e.printStackTrace();                         }                 }         } } class MyRunnable implements Runnable {          public void run() {                  for ( int i = 0; i < 10; i++) {                         System.out.println( "线程2第" + i + "次执行!");                          try {                                 Thread.sleep(100);                         } catch (InterruptedException e) {                                 e.printStackTrace();                         }                 }         } }   线程1第0次执行! 线程2第0次执行! 线程2第1次执行! 线程1第1次执行! 线程2第2次执行! 线程1第2次执行! 线程1第3次执行! 线程2第3次执行! 线程2第4次执行! 线程1第4次执行! 线程1第5次执行! 线程2第5次执行! 线程1第6次执行! 线程2第6次执行! 线程1第7次执行! 线程2第7次执行! 线程1第8次执行! 线程2第8次执行! 线程1第9次执行! 线程2第9次执行! Process finished with exit code 0
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