只有在java中成功执行thread类的run方法时才调用方法。就像预毁逻辑之类的

public class MyThread extends Thread {
    @Override
    public void run() {
        // 线程执行的逻辑
    }
    
    @Override
    public void finalize() throws Throwable {
        // 预毁逻辑
        super.finalize();
    }
}

public class MyRunnable implements Runnable {
    @Override
    public void run() {
        // 线程执行的逻辑
    }
    
    protected void finalize() throws Throwable {
        // 预毁逻辑
        super.finalize();
    }
}

public class Main {
    public static void main(String[] args) {
        Runnable myRunnable = new MyRunnable();
        Thread thread = new Thread(myRunnable);
        thread.start();
    }
}