方法里面怎么才能判断文本输入框失去焦点?
FocusListener
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Demo extends JFrame implements FocusListener{
private JTextField jtfDemo1,jtfDemo2;
public Demo(){
jtfDemo1=new JTextField();
jtfDemo2=new JTextField();
jtfDemo2.addFocusListener(this);
getContentPane().add(jtfDemo1,BorderLayout.NORTH);
getContentPane().add(jtfDemo2,BorderLayout.SOUTH);
setSize(100,100);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void focusGained(FocusEvent e){
}
public void focusLost(FocusEvent e){
System.out.println("失去焦点");
}
public static void main(String[] args){
new Demo();
}
}
谢谢版主
我想用内部类实现这样把我把我的代码发上来你帮我看下好吗?
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
class UserEnter extends JFrame
{
JLabel clewLabel = new JLabel("请输入用户名和密码");
JLabel nameLabel = new JLabel("姓名:");
JLabel pwdLabel = new JLabel("密码:");
JTextField nameText = new JTextField();
JTextField pwdText = new JTextField();
JButton okButton = new JButton("确定");
JButton resetButton = new JButton("重置");
public UserEnter()
{
Container vessel = this.getContentPane();
vessel.setLayout(null);
clewLabel.setBounds(80,20,120,25);
nameLabel.setBounds(30,65,60,25);
pwdLabel.setBounds(30,105,60,25);
nameText.setBounds(65,65,190,25);
pwdText.setBounds(65,105,190,25);
okButton.setBounds(30,160,70,25);
resetButton.setBounds(180,160,70,25);
vessel.add(clewLabel);
vessel.add(nameLabel);
vessel.add(pwdLabel);
vessel.add(nameText);
vessel.add(pwdText);
vessel.add(okButton);
vessel.add(resetButton);
okButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
e.getActionCommand();
System.out.println(e.getActionCommand());
new JPanel(); //当我点击这个按钮的时候怎么才能弹出一个新的面版
System.exit(0); //dispose在这怎么用?
}
});
resetButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
nameText.setText("");
pwdText.setText("");
}
});
//
// nameText.addFocusListener( new FocusListener(){ //当文本框失去焦点的时候我要调用Text文档做比较
// public void focusLost(FocusEvent e)
// {
//
// }
//
// });
this.setSize(300,230);
this.setVisible(true);
this.setTitle("用户登陆");
}
public static void main(String [] args)
{
new UserEnter();
}
}
[此贴子已经被作者于2007-1-2 13:54:41编辑过]