Swing如何修改按鈕預設外觀？

下面的範例展示了如何在Java Swing應用程式中修改按鈕的預設外觀。

使用以下API -

• UIManager.setLookAndFeel() - 更改java應用程式的當前外觀。
• UIManager.getSystemLookAndFeelClassName() - 獲取當前作業系統的外觀。

範例

package com.yiibai.swingdemo;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class SwingTester {
   public static void main(String[] args) 
      throws ClassNotFoundException, InstantiationException
      , IllegalAccessException, UnsupportedLookAndFeelException {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
      createWindow();
   }

   private static void createWindow() {    
      JFrame frame = new JFrame("Swing修改按鈕預設樣式(tw511.com)");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      createUI(frame);
      frame.setSize(560, 200);      
      frame.setLocationRelativeTo(null);  
      frame.setVisible(true);
   }

   private static void createUI(final JFrame frame){  
      JPanel panel = new JPanel();
      LayoutManager layout = new FlowLayout();  
      panel.setLayout(layout);       

      JButton okButton = new JButton("確定");
      JButton cancelButton = new JButton("取消");
      cancelButton.setEnabled(false);
      JButton submitButton = new JButton("提交");

      okButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            JOptionPane.showMessageDialog(frame, "點選了確定按鈕");
         }
      });

      submitButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            JOptionPane.showMessageDialog(frame, "點選了提交按鈕");
         }
      });

      frame.getRootPane().setDefaultButton(submitButton);

      panel.add(okButton);
      panel.add(cancelButton);
      panel.add(submitButton);

      frame.getContentPane().add(panel, BorderLayout.CENTER);    
   }
}

執行上面範例程式碼，得到以下結果: