写了一个小闹钟

package com.konghao.test;

public class Alarm implements Runnable {
private boolean isWork; //闹钟是否开启

public Alarm() {
super();
this.isWork = false; //没在响；
}

public boolean isWork() {
return isWork;
}

public void setWork(boolean isWork) {
this.isWork = isWork;
}

//闹方法
public void work(){
synchronized (this) {
//闹钟运行时，打印字符
if(isWork){
System.out.println("it's time for up!");
this.notify();
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}else{
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}

@Override
public void run() {
for (int i = 0; i < 10; i++) {
this.setWork(true);
work();
}
}

}

package com.konghao.test;

public class User implements Runnable{
private String name;
private Alarm myAlarm;

public User(String name, Alarm myAlarm) {
super();
this.name = name;
this.myAlarm = myAlarm;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Alarm getMyAlarm() {
return myAlarm;
}
public void setMyAlarm(Alarm myAlarm) {
this.myAlarm = myAlarm;
}
public void stopAlarm(){
synchronized (myAlarm) {
if(myAlarm.isWork()){
myAlarm.setWork(false);
System.out.println(this.name+"按了闹钟！");
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
} finally{
myAlarm.notify();
try {
myAlarm.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}else{
try {
myAlarm.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
@Override
public void run() {
while(true){
stopAlarm();
}

}

}
package com.konghao.test;

public class Test {
public static void main(String[] args) {
Alarm al = new Alarm();
User u = new User("小胖",al);
Thread ut = new Thread(u);
Thread at = new Thread(al);

ut.setDaemon(true);
ut.start();
at.start();
}

}