Question

thread两个线程交替运行,在线等!!!!

//当前线程代码

public class GuessNumber implements Runnable {
private String playerName;//玩家名字
private GiveNumber giveNumber;//游戏对象

public GuessNumber(String playerName , GiveNumber giveNumber) {
this.playerName = playerName;
this.giveNumber = giveNumber;
}

@Override
public void run() {
while (true) {
Scanner sc = new Scanner(System.in);
System.out.print(playerName + " 猜:");
int nowNum = sc.nextInt();
System.out.println("你猜的数字是" + nowNum);
}
}

}

//在另一个类中运行这个线程
public class StartGame {

public static void main(String[] args) throws InterruptedException {
GiveNumber giveNumber = new GiveNumber();
GuessNumber guessNumber1 = new GuessNumber("玩家1", giveNumber);
GuessNumber guessNumber2 = new GuessNumber("玩家2", giveNumber);
Thread thread1 = new Thread(guessNumber1);
Thread thread2 = new Thread(guessNumber2);
thread1.start();
thread2.start();
}

}

问题,我怎么让两个线程thread1和thread1交替运行,要求用到 wait notify

Answer 1

public class GuessNumber implements Runnable {
private String playerName;//玩家名字
private Object giveNumber;//游戏对象

public GuessNumber(String playerName , Object giveNumber) {
this.playerName = playerName;
this.giveNumber = giveNumber;
}

@Override
public void run() {
while (true) {
synchronized (giveNumber) {
Scanner sc = new Scanner(System.in);
System.out.print(playerName + " 猜:");
int nowNum = sc.nextInt();
System.out.println("你猜的数字是" + nowNum);
giveNumber.notify();
try {
giveNumber.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
public static void main(String[] args) throws InterruptedException {
Object giveNumber = new Object();
GuessNumber guessNumber1 = new GuessNumber("玩家1", giveNumber);
GuessNumber guessNumber2 = new GuessNumber("玩家2", giveNumber);
Thread thread1 = new Thread(guessNumber1);
Thread thread2 = new Thread(guessNumber2);
thread1.start();
thread2.start();
}

}

我这没有GiveNumber 这个类，你把Object替换了就行