JPanel和JButton，无法说明如何布局2个简单按钮 [英] JPanel and JButton, cannot figure how to layout 2 simple buttons

问题描述

我从JPanel开始，我试图将2个简单的按钮放在框架上，我能够放置按钮，但不能将它们定位，这是我的代码:

i am starting with JPanel and i am trying to put 2 simple buttons on a frame, i was able to put the buttons but not position them, here is my code:

JFrame frame = new JFrame();
frame.setSize(500,500);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);       

JButton but = new JButton("text");
JButton but2 = new JButton("list");

JPanel panel= new JPanel(new GridLayout(1, 2));
panel.setSize(100, 100);
panel.add(but);
panel.add(but2);    

frame.add(panel);
frame.setVisible(true);

这是我想要的草图:

推荐答案

查找布局填充和边框以解决此问题.

Look to layout padding and borders to solve this.

import java.awt.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;

class TwoButtonLayout {

    public static void main(String[] args) {
        Runnable r = new Runnable() {

            @Override
            public void run() {
                // adjust numbers to need..
                JPanel panel = new JPanel(new GridLayout(1, 2, 40, 40));
                // adjust numbers to need..
                panel.setBorder(new EmptyBorder(20,30,20,30));
                panel.setBackground(Color.WHITE);

                JButton but = new JButton("text");
                JButton but2 = new JButton("list");

                panel.add(but);
                panel.add(but2);

                JOptionPane.showMessageDialog(null, panel);
            }
        };
        // Swing GUIs should be created and updated on the EDT
        // http://docs.oracle.com/javase/tutorial/uiswing/concurrency
        SwingUtilities.invokeLater(r);
    }
}

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