使用JAVA打开图片。(面板可以随着图片的不同,调整不同的大小去展示图片)
JAVA代码:
public class ShowPic {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
JFrame frame = new ImageViewerFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}
class ImageViewerFrame extends JFrame{
public ImageViewerFrame(){
setTitle("ImageViewer");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
label = new JLabel();
add(label);
chooser = new JFileChooser();
JMenuBar menubar = new JMenuBar();
setJMenuBar(menubar);
JMenu menu = new JMenu("File");
menubar.add(menu);
JMenuItem openItem = new JMenuItem("Open");
menu.add(openItem);
JMenuItem exitItem = new JMenuItem("Close");
menu.add(exitItem);
this.setLocation(screen.width/2-this.getWidth()/2,screen.height/2-this.getHeight()/2);
openItem.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
int result = chooser.showOpenDialog(null);
if(result == JFileChooser.APPROVE_OPTION){
String name = chooser.getSelectedFile().getPath();
File picture = new File(name);
BufferedImage sourceImg = null;
try {
sourceImg = ImageIO.read(new FileInputStream(picture));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
setSize(sourceImg.getWidth(),sourceImg.getHeight());
setLocation(screen.width/2-sourceImg.getWidth()/2,screen.height/2-sourceImg.getHeight()/2);
label.setIcon(new ImageIcon(name));
}
}
});
exitItem.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
System.exit(0);
}
});
}
Toolkit tool = Toolkit.getDefaultToolkit();
Dimension screen = tool.getScreenSize();
private JLabel label;
private JFileChooser chooser;
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULT_HEIGHT = 400;
}
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