Java，三条线程依次交替输出十次ABC

public class MyThreadTest {
    public static void main(String[] args) {
        PrintABC printABC = new PrintABC();
        new Thread(new Runnable() {
            @Override
            public void run() {
                for (int i = 0; i < 10; i++) {
                    printABC.printA();
                }
            }
        }).start();

        new Thread(new Runnable() {
            @Override
            public void run() {
                for (int i = 0; i < 10; i++) {
                    printABC.printB();
                }
            }
        }).start();

        new Thread(new Runnable() {
            @Override
            public void run() {
                for (int i = 0; i < 10; i++) {
                    printABC.printC();