我参考这篇文章：
https://www.jianshu.com/p/cdca9a30b86b

在IDEA里面建了一个GUI的基础，然后，我想在线程里面
更改界面上的label的text属性，结果改不了，界面上的text属性没有变化。

请问该怎么写代码才能改？

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.FocusAdapter;

import java.awt.event.FocusEvent;

import java.awt.image.ImageObserver;

import java.text.AttributedCharacterIterator;

import java.util.ArrayList;

import java.util.List;

import java.util.Timer;

import java.util.TimerTask;



public class Form_Main {

    private JButton button1;

    private JPanel panel1;

    private JLabel mylabel;



    Thread_Run_Voice_Merge thread_Run_Voice_Merge = null;





    public static void main(String[] args) {

        JFrame frame = new JFrame("Form_Main");

        frame.setContentPane(new Form_Main().panel1);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.pack();

        frame.setVisible(true);

        frame.setLocationRelativeTo(new Form_Main().panel1);

        //frame.setLocation(300,300);

        frame.setSize(300, 300);



        new Form_Main().RunThread();



    }



    public void RunThread() {

        thread_Run_Voice_Merge = new Thread_Run_Voice_Merge();

        new Thread(thread_Run_Voice_Merge).start();



        System.out.println("线程启动了");



    }



    public class Thread_Run_Voice_Merge implements Runnable {



        public Thread_Run_Voice_Merge() {



        }



        @Override

        public void run() {

            SwingUtilities.invokeLater(new Runnable() {

                @Override

                public void run() {



		mylabel.setText("你好");

		mylabel.updateUI();

		mylabel.repaint();

		mylabel.revalidate();

		panel1.updateUI();

		panel1.repaint();

		panel1.revalidate();



                }

            });

        }

    }

}