執行緒題1

設定三個執行緒並行

t1列印a
t2列印b
t3列印c

輸出abc abc abc abc

/**
*
* 設計三個執行緒併發執行
* t1 列印 a
* t2 列印 b
* t3 列印 c
*
* 輸出 abc abc abc abc
*
*/
public class LockTest9 {
    public static void main(String[] args) {
        WaitNofity waitNofity = new WaitNofity();

    //執行緒t1
        new Thread(() ->{
            try {
                waitNofity.print("a",1,2);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        },"t1").start();

    //執行緒t2
        new Thread(() ->{
            try {
                waitNofity.print("b",2,3);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        },"t2").start();

    //執行緒t3
        new Thread(() ->{
            try {
                waitNofity.print("c",3,1);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        },"t3").start();

    }



    static class WaitNofity{
        //執行標誌
        int flag = 1;

        /**
         * @Param content 輸出內容
         * @Param waitFlag 本次執行標誌
         * @Param nextFlag 下次執行標誌
         **/
        public void print(String content,int waitFlag,int nextFlag) throws InterruptedException {
            for (int i = 0; i < 4; i++){
                synchronized (this){
                    while (flag != waitFlag){
                        this.wait();//阻塞
                    }
                    System.out.print(content);
                    if(waitFlag == 3){
                        System.out.print(" ");
                    }
                    flag = nextFlag;
                    this.notifyAll();//喚醒全部
                }

            }
        }
    }

}
 

執行結果：