Jtabbedpane使用多个类 [英] Jtabbedpane using multiple classes

问题描述

我是相当新的java和创建一个windowbuilder程序。我想知道是否是可能的，当使用Jtabbedpane和在程序窗口中的选项卡之间切换，如果我可以使用actionlistener从一个单独的类获取内容。例如，我有一个程序有两个选项卡和两个类，第一个选项卡将有一个类的代码和第二个类的第二个选项卡。

I'm fairly new to java and am creating a windowbuilder program. I am wondering if it is possible when using Jtabbedpane and switching between the tabs in the program window if i can use an actionlistener to get the contents from a separate class. For example, i have a program with two tabs and two classes, the first tab will have the code from one class and the second tab from the second class.

谢谢

推荐答案

如果你想把创建GUI的代码分成多个类，你可以使用这个aproach：

If you want to separate your code which creates GUI, to multiple classes, you could use this aproach:

这将是你的主类，它将包含 JTabbedPane ：

This would be your main class which will contain JTabbedPane:

import javax.swing.JFrame;
import javax.swing.JTabbedPane;
import javax.swing.SwingUtilities;

public class Main {
    JFrame frame = new JFrame();
    JTabbedPane tabbedPane = new JTabbedPane();
    FirstPanel fp = new FirstPanel();
    SecondPanel sp = new SecondPanel();

    public Main() {
        tabbedPane.add("First", fp);
        tabbedPane.add("Second", sp);
        frame.getContentPane().add(tabbedPane);
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        frame.setSize(640, 480);
        // frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new Main();
            }
        });
    }

}

扩展 JPanel 或其他类型的容器：

This would be your second class which extends JPanel or some other type of container:

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;

import javax.swing.JPanel;

public class FirstPanel extends JPanel{

    public void paintComponent(Graphics g){
        g.setColor(Color.BLACK);
        g.setFont(new Font("Verdana",Font.BOLD,16));
        g.drawString("Hello there", 20, 20);
    }
}

第三类的示例也扩展 JPanel ：

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class SecondPanel extends JPanel{
    JButton button = new JButton("Click me!");

    public SecondPanel() {
        button.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                JOptionPane.showMessageDialog(null, "You just clicked button");
            }
        });
        add(button);
    }

    public void paintComponent(Graphics g){
        g.setColor(Color.BLACK);
        g.setFont(new Font("Verdana",Font.BOLD,16));
        g.drawString("Hello there again!", 20, 20);
    }
}

屏幕截图：

>

EDIT：

此外，与 JPanel 明智地在该类中创建一个方法，该方法返回自定义的 JPanel 。这种方式，你的类继承开放继承。

Also, instead of extending classes with JPanel, it would be wise to create just a method in that class which returns customized JPanel. This way your class stays "opened" for inheritance.

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