yield:放弃CPU的抢占全
jion：等制定的线程执行完毕后继续运行
sleep：静态方法 ，让线程休眠毫秒
daemon：守护线程，如果应用程序里面都是守护线程，则程序结束
class ThreadDemo2{
public static void main(String[] agrs) {
Player p1 =new Player("史泰龙",8000);
Player p2 =new Player("成龙",5000);
Player p3 =new Player("李小龙",2000);
Player p4 =new Player("李连杰",3000);
p1.start();
p2.start();
p3.start();
p4.start();
//join 等这个分线程执行完毕在往下执行 join方法也有异常
try{
p1.join();
p2.join();
p3.join();
p4.join();
}
catch(Exception e){
}
System.out.println("人到齐了");
}
}
class Player extends Thread{
private String name;
private int time;
public Player( String name,int time){
this.name =name;
this.time=time;
}
public void run(){
System.out.println("玩家"+name+"出发了");
try{
//让当前进程休眠time 毫秒
Thread.sleep(time);
}
catch(Exception e){
}
System.out.println("玩家" +name+"到了");
}
}
ktv点歌线程
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class NineThreadDemo3{
public static void main(String[] agrs) {
Room R =new Room("1",8000);
Waiter w =new Waiter();
//一个主线程，一个房间线程，一个服务生线程
//设置线程为守护线程 w.setDaemon(true); 守护非守护线程的
//w.setDaemon(true);
R.start();
w.start();
}
}
class Room extends Thread{
private String no;
private int time;
public Room( String no,int time){
this.no =no;
this.time=time;
}
public void run(){
System.out.println("房间"+no+"正在唱歌");
try{
//让当前进程休眠 time 毫秒
Thread.sleep(time);
}
catch(Exception e){
}
System.out.println("房间" +no+"买单");
}
}
//服务员每隔一秒就包时间
class Waiter extends Thread{
//只有是服务员就是守护线程
public Waiter(){
this.setDaemon(true);
}
public void run(){
while(true){
System.out.println(new java.util.Date());
try{
//每隔一秒报一次
Thread.sleep(1000);
}
catch(Exception e){
}
}
}
}