?? ch10ex15.java
字號(hào):
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
class List extends JFrame{
private JList images;
private JTextField show;
private JLabel label;
private String names[]={"圖片1.gif","圖片2.gif","圖片3.gif","圖片4.gif","圖片5.gif","圖片6.gif","圖片7.gif","圖片8.gif"};
private ImageIcon icon[]={new ImageIcon(names[0]),new ImageIcon(names[1]),new ImageIcon(names[2]),new ImageIcon(names[3]),new ImageIcon(names[4]),new ImageIcon(names[5]),new ImageIcon(names[6]),new ImageIcon(names[7])};
public List(){
setTitle("列表框顯示圖片文件");
setSize(200,300);
Container cp=getContentPane();
cp.setLayout(new BorderLayout());
images=new JList(names);
show=new JTextField(10);
images.setVisibleRowCount(4);
images.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
JPanel jp1=new JPanel();
jp1.setLayout(new GridLayout(0,2));
jp1.add(new JScrollPane(images));
cp.add(jp1,BorderLayout.NORTH);
label=new JLabel(icon[0]);
cp.add(label,BorderLayout.CENTER);
cp.add(show,BorderLayout.SOUTH);
images.addListSelectionListener(new ImageSelection());
addWindowListener(new WindowDestroyer());
}
class ImageSelection implements ListSelectionListener{
public void valueChanged(ListSelectionEvent evt){
Object value=images.getSelectedValue();
show.setText(value.toString());
label.setIcon(icon[images.getSelectedIndex()]);
}
}
}
class WindowDestroyer extends WindowAdapter{
public void windowClosing(WindowEvent e){
System.exit(0);
}
}
public class ch10ex15{
public static void main(String args[]) {
List win=new List();
win.setVisible(true);
}
}
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