Java三个线程循环打印ABC。。。，是个笔试题，主要学习掌握线程同步，需要有线程基础知识。 思路：通过synchronized关键词锁定对象让线程同步，根据取模运算符%交替打印，每打印一次并唤醒其他睡眠线程同时使自身线程Wait，依次循环。
定义一个线程执行主体
/**
* Created by litf on 2017/5/4.
*/
public class RunnableAbc implements Runnable{
private Integer id;
private String name;
private Integer count=3;
private static Integer sums = 1;
private final static Object object = new Object();
public RunnableAbc(Integer id,String name){
this.id = id;
this.name = name;
}
@Override
public void run() {
while(true){
synchronized (object){
if(sums % count == id){
System.out.print(name);
sums++;
object.notifyAll();
if(name.equals("C"))
System.out.println();
}else if(sums >30){
object.notifyAll();
break;
}else{
try {
object.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}
}
调用打印ABC
/**
* Created by litf on 2017/5/4.
*/
public class RunableTest {
public static void main(String args[]){
new Thread(new RunnableAbc(1,"A")).start();
new Thread(new RunnableAbc(2,"B")).start();
new Thread(new RunnableAbc(0,"C")).start();
}
}
打印结果：
ABC
ABC
ABC
ABC
ABC
ABC
ABC
ABC
ABC
ABC
AB