线程状态
线程停止
package Status;
/**
* @author Wzjz
* @create 2021-06-16-22:29
*/
//1,建议线程正常停止-->利用次数,不建议死循环
//2,建议使用标志位-->设置一个标志位
//3,不建议使用stop或者destroy等过时或者JDK不建议使用的方法
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("run....Thread" + 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方法标志标志位,让线程停止
testStop.stop();
System.out.println("线程该停止了");
}
}
}
}
线程休眠
package Status;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* @author Wzjz
* @create 2021-06-16-22:46
*/
//模拟倒计时、、、
public class TestSleep2 {
/* public static void main(String[] args) {
try {
tenDen();
} catch (InterruptedException e) {
e.printStackTrace();
}
}*/
public static void main(String[] args) {
//打印当前系统时间
Date startTime = new Date(System.currentTimeMillis());//获取系统 当前时间
while (true){
try {
Thread.sleep(1000);
System.out.println(new SimpleDateFormat("HH:mm:ss").format(startTime));
startTime = new Date(System.currentTimeMillis());//更新当前时间
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
//模拟倒计时
public static void tenDen() throws InterruptedException {
int num = 10;
while (true){
Thread.sleep(1000);
System.out.println(num--);
if(num<=0){
break;
}
}
}
}
package Status;
import com.test.TestThread03;
/**
* @author Wzjz
* @create 2021-06-16-22:43
*/
//模拟网络延时:方法问题的发生性
public class TestSleep implements Runnable{
//票数
private int ticketNums = 10;
@Override
public void run() {
while (true){
if (ticketNums<=0){
break;
}
//模拟延时
try {
Thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getName()+"-->拿到了第"+ticketNums--+"票");
}
}
public static void main(String[] args) {
TestSleep testThread03 = new TestSleep();
new Thread(testThread03,"小明").start();
new Thread(testThread03,"老师").start();
new Thread(testThread03,"黄牛").start();
}
}
礼让线程(yield)
package Status;
/**
* @author Wzjz
* @create 2021-06-16-22:58
*/
//测试礼让线程
//礼让不一定成功,看cpu心情
public class TestYield {
public static void main(String[] args) {
MyYield myYield = new MyYield();
new Thread(myYield,"a").start();
new Thread(myYield,"b").start();
}
}
class MyYield implements Runnable{
@Override
public void run() {
System.out.println(Thread.currentThread().getName()+"线程开始执行 ");
Thread.yield();//线程礼让
System.out.println(Thread.currentThread().getName()+"线程停止执行");
}
}
线程强制执行(join)
package Status;
/**
* @author Wzjz
* @create 2021-06-16-23:04
*/
//测试Join方法,想象成插队
public class TestJoin implements Runnable{
@Override
public void run() {
for (int i = 0; i < 50; i++) {
System.out.println("vip来了" + i);
}
}
public static void main(String[] args) throws InterruptedException {
//启动线程
TestJoin testJoin = new TestJoin();
Thread thread = new Thread(testJoin);
thread.start();
//主线程
for (int i = 0; i < 100; i++) {
if (i == 20){
thread.join();//插队
}
System.out.println("main" + i);
}
}
}