请问java的一个基础问题。

[sgyiliya]

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();

                }
            });
        }
    }
}

[瘦死的黑骆驼]

楼上正解

[sgyiliya]

没人回答吗？

[qq_39936465]

引用 1 楼 sgyiliya 的回复:

没人回答吗？

你label和panel1都还没加入frame 怎么会改变？！