7.线程优先级

7.线程优先级

所谓的优先级是越高的优先级，越有可能先执行。在Thread里面提供如下方法：

• 设置优先级：public final void setPriority(int newPriority)
• 取得优先级：public final int getPriority()

发现设置和取得优先级都是使用int数据类型，对此有三种取值：

• 最高优先级：public final static int MAX_PRIORITY = 10;
• 中等优先级：public final static int NORM_PRIORITY = 5;
• 最低优先级：public final static int MIN_PRIORITY = 1;

代码如下：

public class TestSleep  implements Runnable{
    
    @Override
    public void run() {
    
        for(int i=0;i<10;i++){
    
            try {
    
                Thread.sleep(1000);
            } catch (InterruptedException e) {
    
                e.printStackTrace();
            }
            System.out.print("购物,mony = " + Thread.currentThread().getName());
        }
    }
}
class MySleep{
    
    public static void main(String[] args) {
    
        TestSleep testSleep = new TestSleep();
        Thread t1 = new Thread(testSleep,"A");
        Thread t2 = new Thread(testSleep,"B");
        Thread t3 = new Thread(testSleep,"C");
        t1.setPriority(Thread.MAX_PRIORITY);
        t1.start();
        t2.start();
        t3.start();
    }
}

注意：设置优先级可能先执行，不是必须的