java基础-java线程如何设置优先级

java线程如何设置优先级

1.继承Thread类重写run方法
2.创建线程的实现类对象
3.threadDemo1.getPriority() 获取线程的优先级
4.threadDemo1.setPriority(10)设置线程的优先级，数越高表示获取CPU时间片的几率高，并不是每次数越大的都能优先获取
5.创建并开始新线程

public class ThreadDemo extends Thread {
    //1）重写run方法
    @Override
    public void run() {
        for (int i = 1;i < 20;i++){
            System.out.println(getName()+":"+i);
        }
    }
    public static void main(String[] args) {
        // 2）创建线程的实现类对象
        ThreadDemo threadDemo1 = new ThreadDemo();
        ThreadDemo threadDemo2 = new ThreadDemo();
        ThreadDemo threadDemo3 = new ThreadDemo();
        threadDemo1.setName("线程1");
        threadDemo2.setName("线程2");
        //3）获取优先级
        System.out.println(threadDemo1.getPriority());
        System.out.println(threadDemo2.getPriority());
        System.out.println(threadDemo3.getPriority());
        //4）设置优先级
        threadDemo2.setPriority(6);
        threadDemo1.setPriority(10);
        //5）创建并开始新线程
        threadDemo1.start();
        threadDemo2.start();
        System.out.println(Thread.currentThread().getName());
    }

}