使用线程实现ACB的顺序输出

在java中可以使用join方法来实现，join会阻塞当前方法，调用的当前方法执行结束后，才会继续往下执行！

public class Foo {

    public Foo() {
    }

    public void A(){
        System.out.println("A");
    }

    public void B(){
        System.out.println("B");
    }

    public void C(){
        System.out.println("C");
    }
}

public class SortContent {


    public static void main(String[] args) throws InterruptedException {


        Thread ta= new ThreadA();
        Thread tb= new ThreadB();
        Thread tc= new ThreadC();

//使用匿名内部类建立多线程

//        Thread ta= new Thread(()->new Foo().A());
//        Thread tB= new Thread(()->new Foo().B());
//        Thread tC= new Thread(()->new Foo().C());

ta.start(); ta.join(); tc.start(); tc.join(); tb.start(); } }
//继承thread类实现
class ThreadA extends Thread{
    @Override
    public void run(){
        new Foo().A();
    }
}
class ThreadB extends Thread{
    @Override
    public void run(){
        new Foo().B();
    }
}
class ThreadC extends Thread{
    @Override
    public void run(){
        new Foo().C();
    }
}