public class ThreadGroupDemo {
    public static void main(String[] args) {
        ThreadGroup group = new ThreadGroup("group") {
            @Override
            public void uncaughtException(Thread thread, Throwable throwable) {
                System.out.printf("%s: %s%n",thread.getName(), throwable.getMessage());
            }
        };
        
        Thread thread = new Thread(group, () -> {
            throw new RuntimeException("测试异常");
        });
        
        thread.start();
    }
}