Java线程对象如何调用原始类中的方法？

class MyThread extends Thread {
    private OriginalClass original;

    public MyThread(OriginalClass original) {
        this.original = original;
    }

    @Override
    public void run() {
        original.method();
    }
}

OriginalClass original = new OriginalClass();
Thread thread = new MyThread(original);
thread.start();

class MyRunnable implements Runnable {
    private OriginalClass original;

    public MyRunnable(OriginalClass original) {
        this.original = original;
    }

    @Override
    public void run() {
        original.method();
    }
}

OriginalClass original = new OriginalClass();
Runnable runnable = new MyRunnable(original);
Thread thread = new Thread(runnable);
thread.start();

OriginalClass original = new OriginalClass();
Thread thread = new Thread(new Runnable() {
    @Override
    public void run() {
        original.method();
    }
});
thread.start();