java如何设置线程优先级_Java 实例

Java 实例 - 线程优先级设置

以下实例演示了如何通过setPriority() 方法来设置线程的优先级：

/*

author by w3cschool.cn

SimplePriorities.java

*/

public class SimplePriorities extends Thread {

private int countDown = 5;

private volatile double d = 0;

public SimplePriorities(int priority) {

setPriority(priority);

start();

}

public String toString() {

return super.toString() + ": " + countDown;

}

public void run() {

while(true) {

for(int i = 1; i < 100000; i++)

d = d + (Math.PI + Math.E) / (double)i;

System.out.println(this);

if(--countDown == 0) return;

}

}

public static void main(String[] args) {

new SimplePriorities(Thread.MAX_PRIORITY);

for(int i = 0; i < 5; i++)

new SimplePriorities(Thread.MIN_PRIORITY);

}

}

以上代码运行输出结果为：

Thread[Thread-1,1,main]: 5

Thread[Thread-2,1,main]: 5

Thread[Thread-3,1,main]: 5

Thread[Thread-0,10,main]: 5

Thread[Thread-3,1,main]: 4

Thread[Thread-0,10,main]: 4

Thread[Thread-1,1,main]: 4

Thread[Thread-5,1,main]: 5

Thread[Thread-4,1,main]: 5

Thread[Thread-2,1,main]: 4

Thread[Thread-0,10,main]: 3

Thread[Thread-1,1,main]: 3

Thread[Thread-4,1,main]: 4

Thread[Thread-2,1,main]: 3

……