如何让主线程等待完成UncaughtExceptionHandler的执行

// 步骤1：创建自定义的异常处理类
class CustomUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
    @Override
    public void uncaughtException(Thread t, Throwable e) {
        // 自定义异常处理逻辑
        System.out.println("Uncaught exception occurred: " + e.getMessage());
    }
}

public class MainThreadExample {
    public static void main(String[] args) {
        // 步骤2：设置自定义的异常处理类为默认的未捕获异常处理器
        Thread.setDefaultUncaughtExceptionHandler(new CustomUncaughtExceptionHandler());

        // 步骤3：创建其他线程并启动它们
        Thread thread1 = new Thread(() -> {
            // 线程1的任务逻辑
            throw new RuntimeException("Exception in thread 1");
        });

        Thread thread2 = new Thread(() -> {
            // 线程2的任务逻辑
            throw new RuntimeException("Exception in thread 2");
        });

        thread1.start();
        thread2.start();

        try {
            // 步骤4：等待其他线程的执行完成
            thread1.join();
            thread2.join();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        // 步骤5：执行其他任务
        System.out.println("All threads have completed.");
    }
}