我的問題是，單擊Browse按鈕后，它會(huì)顯示目錄中的所有文件供選擇，然后所選的圖像會(huì)正確顯示在GUI中。但是，當(dāng)我第二次單擊“瀏覽”按鈕時(shí)，它僅顯示舊圖像，而不顯示新圖像。請(qǐng)幫助我。package GUI;import java.awt.BorderLayout;import java.awt.EventQueue;import java.awt.Graphics2D;import javax.imageio.ImageIO;import javax.swing.ImageIcon;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.border.EmptyBorder;import javax.swing.JLabel;import javax.swing.JButton;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.util.logging.Level;import java.util.logging.Logger;import javax.swing.GroupLayout;import javax.swing.GroupLayout.Alignment;@SuppressWarnings("serial")public class MainAppFrame extends JFrame {    private JPanel contentPane;    File targetFile;    BufferedImage targetImg;    public JPanel panel,panel_1;    private static final int baseSize = 128;    private static final String basePath =![enter image description here][1]            "C:\\Documents and Settings\\Administrator\\Desktop\\Images";    /**     * Launch the application.     */    public static void main(String[] args) {        EventQueue.invokeLater(new Runnable() {            public void run() {                try {                    MainAppFrame frame = new MainAppFrame();                    frame.setVisible(true);                    frame.setResizable(false);                } catch (Exception e) {                    e.printStackTrace();                }            }        });    }    /**     * Create the frame.     */    public MainAppFrame() {        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        setBounds(100, 100, 550, 400);        contentPane = new JPanel();        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));        setContentPane(contentPane);        contentPane.setLayout(new BorderLayout(0, 0));