线程停止
public class TestStop implements Runnable {
//1.设置一个标志位
private boolean flag = true;
@Override
public void run() {
int i = 0;
while (flag){
System.out.println("Thread is running..." + i);
}
}
//2.设置一个公开的方法停止线程,转换标志位
public void stop(){
this.flag = false;
}
public static void main(String[] args) {
TestStop testStop = new TestStop();
new Thread(testStop).start();
for (int i = 0; i < 1000; i++) {
System.out.println("main" + i);
if (i == 900){
//调用stop方法,切换标志位,停止线程
testStop.stop();
System.out.println("该线程该停止了");
}
}
}
}
建议:
1.建议线程正常停止--->利用次数不建议使用死循环
2.建议使用标志位--->设置一个标志位
3.不要使用stop或destroy等过时或者JDK不建议的方法
线程优先级
public class TestYield {
public static void main(String[] args) {
MyYield myYield = new MyYield();
Thread a = new Thread(myYield, "a");
a.start();
Thread b = new Thread(myYield, "b");
b.start();
}
}
class MyYield implements Runnable{
@Override
public void run() {
System.out.println(Thread.currentThread().getName() + "开始");
Thread.yield();//线程礼让
System.out.println(Thread.currentThread().getName() + "结束");
}
}
yield方法只是让出cpu,之后可能会再次进入cpu,故礼让不一定成功!
线程强制执行
public class TestJoin implements Runnable {
@Override
public void run() {
for (int i = 0; i < 100; i++) {
System.out.println("我是vip线程,第" + i +"次");
}
}
public static void main(String[] args) throws InterruptedException {
TestJoin testJoin = new TestJoin();
Thread thread = new Thread(testJoin);
thread.start();
for (int i = 0; i < 200; i++) {
System.out.println("我是主线程,第" + i +"次");
if (i == 99){
thread.join();//插队
}
}
}
}