62,634
社区成员




import java.awt.FlowLayout;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Vector;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JTextField;
public class JComboBoxDemo extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
private JTextField jtf = null;
private JComboBox jcb = null;
private Vector<String> vdata = new Vector<String>();
private Vector<String> v2 = null;
public JComboBoxDemo() {
this.setLayout(new FlowLayout());
jtf = new JTextField(10);
jtf.addKeyListener(new MyAdapter());
this.add(jtf);
vdata.add("1");
vdata.add("32e");
vdata.add("22");
vdata.add("123");
v2 = new Vector<String>(vdata);
jcb = new JComboBox(vdata);
jcb.setSelectedIndex(0);
jcb.setEditable(true);
this.add(jcb);
this.setTitle("Demo");
this.setSize(600, 450);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
new JComboBoxDemo();
}
class MyAdapter implements KeyListener {
@Override
public void keyPressed(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
String value = JComboBoxDemo.this.jtf.getText().trim();
JComboBoxDemo.this.jcb.removeAllItems();
for (String item : JComboBoxDemo.this.v2) {
if (item.startsWith(value)) {
JComboBoxDemo.this.jcb.addItem(item);
}
}
JComboBoxDemo.this.jcb.validate();
}
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
}
}
}