java執行緒如何設定優先順序

1.繼承Thread類重寫run方法
2.建立執行緒的實現類物件
3.threadDemo1.getPriority() 獲取執行緒的優先順序
4.threadDemo1.setPriority(10)設定執行緒的優先順序，數越高表示獲取CPU時間片的機率高，並不是每次數越大的都能優先獲取
5.建立並開始新執行緒

public class ThreadDemo extends Thread {
    //1）重寫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）建立執行緒的實現類物件
        ThreadDemo threadDemo1 = new ThreadDemo();
        ThreadDemo threadDemo2 = new ThreadDemo();
        ThreadDemo threadDemo3 = new ThreadDemo();
        threadDemo1.setName("執行緒1");
        threadDemo2.setName("執行緒2");
        //3）獲取優先順序
        System.out.println(threadDemo1.getPriority());
        System.out.println(threadDemo2.getPriority());
        System.out.println(threadDemo3.getPriority());
        //4）設定優先順序
        threadDemo2.setPriority(6);
        threadDemo1.setPriority(10);
        //5）建立並開始新執行緒
        threadDemo1.start();
        threadDemo2.start();
        System.out.println(Thread.currentThread().getName());
    }

}