JFileChooser_2

package com.han; import java.awt.Dimension; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.io.File; import javax.swing.ImageIcon; import javax.swing.JFileChooser; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.SwingConstants; import javax.swing.filechooser.FileNameExtensionFilter; public class JFileChooser_2 extends JFrame { /** * */ private static final long serialVersionUID = -5653812191066673849L; static Dimension dimension; static JFileChooser_2 frame; public JFileChooser_2() { // TODO Auto-generated constructor stub final JLabel label = new JLabel("<双击选择图片>", SwingConstants.CENTER); getContentPane().add(label); dimension = getContentPane().getPreferredSize(); // System.out.println(dimension.width + "\t" + dimension.height); label.addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent e) { if (e.getClickCount() == 2) { JFileChooser fileChooser = new JFileChooser(); FileNameExtensionFilter filter = new FileNameExtensionFilter( "图像文件（JPG）", "JPG", "JPEG"); FileNameExtensionFilter filter2 = new FileNameExtensionFilter( "图像文件（JPG/PNG）", "JPG", "JPEG", "PNG"); FileNameExtensionFilter filter3 = new FileNameExtensionFilter( "图像文件（JPG/PNG/GIF）", "JPG", "JPEG", "PNG", "GIF"); fileChooser.addChoosableFileFilter(filter); fileChooser.addChoosableFileFilter(filter2); fileChooser.addChoosableFileFilter(filter3); // Sets the current file filter. fileChooser.setFileFilter(filter2); //fileChooser.setAcceptAllFileFilterUsed(false); int i = fileChooser.showOpenDialog(getContentPane()); if (i == JFileChooser.APPROVE_OPTION) { File file = fileChooser.getSelectedFile(); label.setIcon(new ImageIcon(file.getAbsolutePath())); dimension = getContentPane().getPreferredSize(); // we have to consider the title bar's height and the two border sides dimension = new Dimension(dimension.width + 50, dimension.height + 50); frame.setSize(dimension); } } } }); } /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub frame = new JFileChooser_2(); frame.setTitle("选择照片对话框"); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // we have to consider the title bar's height dimension = new Dimension(dimension.width + 50, dimension.height + 50); frame.setSize(dimension); } }