Java 多线程优先级实例详解

线程的优先级将该线程的重要性传递给调度器。尽管CPU处理现有线程集的顺序是不确定的，但是调度器将倾向于让优先权最高的线程先执行。

你可以用getPriority()来读取现有线程的优先级，并且在任何时刻都可以通过setPriority()来修改优先级。

import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;public class SimplePriorities implements Runnable { private int countDown = 5; private volatile double d; private int priority; public SimplePriorities(int priority){ this.priority = priority; } public String toString(){ //获取当前线程信息 return Thread.currentThread() + ":" + countDown; } @Override public void run() { //设置线程优先级 1-10 Thread.currentThread().setPriority(priority); while(true){ for(int i = 0;i<100000;i++){ d += (Math.PI + Math.E) / (double)i; if(i00 == 0){ Thread.yield(); } } System.out.println(this.toString()); if(--countDown == 0)return; } } public static void main(String[] args) { ExecutorService exec = Executors.newCachedThreadPool(); //优先级为1 exec.execute(new SimplePriorities(Thread.MIN_PRIORITY)); //优先级为10 exec.execute(new SimplePriorities(Thread.MAX_PRIORITY)); exec.shutdown(); }}

toString()方法被覆盖，以便使用Thread.toString()方法来打印线程的名称，线程的优先级以及线程所属的“线程组”。

感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！