三个线程，ABC 10次（volatile+synchronized）

package ThreadABC;

public class Share {
    private volatile int status;

    public int getStatus() {
        return status;
    }

    public void setStatus(int status) {
        this.status = status;
    }

    public Share(int status) {
        this.status = status;
    }
}

package ThreadABC;

public class A implements  Runnable {
    private int num =0;
    private Share lock;
    @Override
    public void run() {
        for(;num < 10;){
            if(lock.getStatus()%3==1) {
                System.out.print("A");
                synchronized(lock) {
                    lock.setStatus(lock.getStatus()+1);
                }
                num++;
            }
        }
    }

    public int getNum() {
        return num;
    }

    public void setNum(int num) {
        this.num = num;
    }

    public A(Share lock) {
        this.lock = lock;
    }
}

package ThreadABC;

public class B implements  Runnable {
    private int num =0;
    private Share lock;
    @Override
    public void run() {
        for(;num < 10;){
            if(lock.getStatus()%3==2) {
                System.out.print("B");
                synchronized(lock) {
                    lock.setStatus(lock.getStatus()+1);
                }
                num++;
            }
        }
    }

    public B(Share lock) {
        this.lock = lock;
    }
}

package ThreadABC;

public class C implements  Runnable {
    private int num =0;
    private Share lock;
    @Override
    public void run() {
        for(;num < 10;){
            if(lock.getStatus()%3==0) {
                System.out.println("C");
                synchronized(lock) {
                    lock.setStatus(lock.getStatus()+1);
                }
                num++;
            }
        }
    }

    public int getNum() {
        return num;
    }

    public void setNum(int num) {
        this.num = num;
    }

    public C(Share lock) {
        this.lock = lock;
    }
}

package ThreadABC;

public class Test {
    public static  void main(String[] args){
        Share o = new Share(1);
        A a = new A(o);
        B b = new B(o);
        C c = new C(o);
        Thread a1 = new Thread(a);
        Thread b1 = new Thread(b);
        Thread c1 = new Thread(c);
        a1.start();
        b1.start();
        c1.start();
    }
}