在調整窗口大小時調整面板中設置的圖標的大小JLabel

我對調整具有設置圖標的JLabel大小有一定的疑問。在調整窗口大小時調整面板中設置的圖標的大小JLabel

我的解決方案是通過調用ActionListener接口的actionperformed（）方法來創建一個調整標籤大小的Timer。

有沒有更好的解決方案？

package examples; 

import images.MyImage; 

import java.awt.BorderLayout; 
import java.awt.Color; 
import java.awt.Graphics; 
import java.awt.GridBagLayout; 
import java.awt.Image; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.image.BufferedImage; 

import javax.swing.Box; 
import javax.swing.ImageIcon; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.Timer; 

public class examples2 { 

    private static JFrame frame = new JFrame(); 
    private static JPanel panel = new JPanel(new BorderLayout()); 

    private static class ButtonHandler implements ActionListener { 

     @Override 
     public void actionPerformed(ActionEvent e) { 
      Image image = resizeImage(MyImage.IMAGE_BLUE_BLACKGROUND, 
        panel.getWidth(), panel.getHeight()); 
      label.setIcon(new ImageIcon(image)); 

     } 

    } 

    private static ActionListener buttonhandler = new ButtonHandler(); 
    private static Timer timer = new Timer(100, buttonhandler); 

    private static JLabel label = new JLabel(new ImageIcon(resizeImage(
      MyImage.IMAGE_BLUE_BLACKGROUND, 1600, 100))); 

    public static void main(String[] args) { 

     JPanel northPanel = new JPanel(new BorderLayout()); 
     JLabel text = new JLabel("Hakan Kiyar"); 

     frame.setLayout(new BorderLayout()); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.getContentPane().add(northPanel, BorderLayout.NORTH); 
     frame.getContentPane().add(new JButton(), BorderLayout.CENTER); 
     frame.setVisible(true); 

     northPanel.add(Box.createVerticalStrut(10), BorderLayout.NORTH); 
     northPanel.add(Box.createHorizontalStrut(10), BorderLayout.WEST); 
     northPanel.add(Box.createHorizontalStrut(10), BorderLayout.EAST); 
     northPanel.add(Box.createVerticalStrut(10), BorderLayout.SOUTH); 
     northPanel.add(panel, BorderLayout.CENTER); 

     text.setForeground(Color.YELLOW); 

     label.setLayout(new GridBagLayout()); 
     label.add(text); 

     panel.add(label); 

     frame.setSize(364, 300); 

     timer.start(); 

    } 

    public static Image resizeImage(Image oldImage, int width, int height) { 

     Image newImage = new BufferedImage(width, height, 
       BufferedImage.TYPE_INT_ARGB); 

     Graphics g = newImage.getGraphics(); 

     g.drawImage(oldImage, 0, 0, null); 
     g.dispose(); 

     return newImage; 
    } 
}

來源

2014-12-07 user3133542