小编han*_*and的帖子

class ThreadUnsafe {

    static final int THREAD_NUMBER = 2;
    static final int LOOP_NUMBER = 200; 

    public static void main(String[] args) {
        ThreadUnsafe test = new ThreadUnsafe();
        for (int i = 0; i < THREAD_NUMBER; i++) {
            new Thread(() -> {
                test.method1(LOOP_NUMBER);
            }, "Thread" + i).start();
        }
    }

  
    ArrayList<String> list = new ArrayList<>();

    public void method1(int loopNumber) {
        for (int i = 0; i < loopNumber; i++) {  
            method2();
            method3();
        }
    }
    private void method2() {
        list.add("1");
    }
    private void method3() …