Eclipse WindowBuilder / Jframe -更新标签文本

Question

嗨，我正在做一个程序，它将运行一个程序列表并打开它们。为了使这个看起来好看，我需要更改标签中的文本，以匹配程序名称。然而，当我调用ChnageTitle和刷新功能时，它们似乎不起作用。你能帮我指出我哪里出错了吗？

下面是自动生成的主要窗口生成器代码，我稍微编辑了一下，并添加了

    package WindowBuilder;

import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.SwingConstants;

import Logic.ButtonPresses;
import javax.swing.JTextField;
import javax.swing.JLabel;

public class WindowBuilder {
    public JLabel Title;
    private JFrame frame;

    /**
     * Launch the application.
     */
    public void Launch() {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    WindowBuilder window = new WindowBuilder();
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the application.
     */
    public WindowBuilder() {
        initialize();
    }

    /**
     * Initialize the contents of the frame.
     */
    public void Refresh(){
        frame.revalidate();
        frame.repaint();
    }
    public void ChangeTitle(){
        Title.setText("Test");
    }
    public void initialize() {
        frame = new JFrame();
        frame.setResizable(false);
        frame.setBounds(100, 100, 450, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JButton btnNext = new JButton("Next");
        btnNext.setBounds(365, 226, 79, 45);
        btnNext.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                ButtonPresses.Next();
            }
        });
        frame.getContentPane().setLayout(null);
        frame.getContentPane().add(btnNext);

        JButton btnBack = new JButton("Back");
        btnBack.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                ButtonPresses.Back();
            }
        });
        btnBack.setBounds(0, 226, 79, 45);
        frame.getContentPane().add(btnBack);

        Title = new JLabel("Program Name");
        Title.setBounds(9, 11, 89, 33);
        frame.getContentPane().add(Title);

        JButton btnInstall = new JButton("Install/Run");
        btnInstall.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
            }
        });
        btnInstall.setBounds(173, 226, 116, 45);
        frame.getContentPane().add(btnInstall);
    }

}

这里是我称之为函数的地方。

    package Main;

import Logic.ProgramAdder;
import Logic.Programs;
import WindowBuilder.WindowBuilder;

public class Main {

    public static void main(String[] args) {
        Main start = new Main();
        start.Start();
    }
    public void Start(){
        WindowBuilder wb = new WindowBuilder();
        wb.Launch();
        ProgramAdder.ProgramList();
        DisplayPrograms();
        wb.ChangeTitle();
        wb.Refresh();
    }
    public static void DisplayPrograms(){
        for (Programs p : ProgramAdder.programs) {
               System.out.print(p.ProgramName);
               System.out.println(p.ProgramPath);
        } 
    }

}

Answer 1

我最近在Swing中开发了一个简单的GUI来从它运行python脚本。如果出现了同样的问题(在JFrame上，标签应该在执行python脚本时告诉用户)，请尝试：

要显示标签：

    Label.setVisible(true);
    Label.paintImmediately(x, y, width, height);

要隐藏标签：

    Label.setVisible(false);

更新：

使用此选项更改文本，而标签是不可见的。

    Label.setText(String text);