java窗体 自定义JFrame类

[java]代码库

import javax.swing.*;

import java.util.concurrent.*;

public class SubmitSwingProgram extends JFrame {

    JLabel label;

    public SubmitSwingProgram() {

        super("Hello Swing");

        label = new JLabel("A Label");

        add(label);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setSize(300, 100);

        setVisible(true);

    }

    static SubmitSwingProgram ssp;

    public static void main(String[] args) throws Exception

    {

        SwingUtilities.invokeLater(new Runnable() {

            public void run() {
                ssp = new SubmitSwingProgram();
            }

        });

        TimeUnit.SECONDS.sleep(1);

        SwingUtilities.invokeLater(new Runnable() {

            public void run() {

                ssp.label.setText("Hey! This is Different!");

            }

        });

    }

}