test_login.java

登录界面 JAVA做的 请指教 Javailable 初学者

/**
 * @(#)test_login.java
 *
 *
 * @author 
 * @version 1.00 2008/12/29
 */
import java.awt.FlowLayout; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 

import java.io.File; 
import java.io.FileWriter; 

import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JOptionPane; 
import javax.swing.JPasswordField; 
import javax.swing.JTextField; 

//用java做个登陆界面输入的用户名和密码输出到纪事本 

public class test_login extends JFrame 
{ 

static String name; 
static String pass; 

public void write2txt() 
{ 
try 
{ 

File f1 = new File ("c:\\temp\\java1.txt"); 
f1.createNewFile(); 
FileWriter f=new FileWriter(f1); 

f.write(name+" "+pass); 
f.write(13); 
f.write(10); 

f.close(); 

} 
catch(Exception e) 
{ 
System.out.println(e.toString()); 
} 
} 



public void create() 
{ 
JFrame fra = new JFrame("这里是窗口"); 
fra.setLayout(new FlowLayout()); //布局管理器 

JTextField j1 = new JTextField("用户名：",5); j1.setEnabled(false); 
JTextField j2 = new JTextField("密码：",5); j2.setEnabled(false); 
final JTextField j3 = new JTextField("",16); 
final JTextField j4 = new JPasswordField("",16); 

JButton b1 = new JButton("确定"); 
JButton b2 = new JButton("取消"); 

class Listener_ok implements ActionListener 
{//“确定按钮监听类” 
public void actionPerformed(ActionEvent e) 
{ 
name = j3.getText(); 
pass = j4.getText(); 
if (name.compareTo("")==0||pass.compareTo("")==0) 
{//用户名密码不为空 
JOptionPane.showMessageDialog(null,"用户名或密码为空，请重新输入","错误", JOptionPane.PLAIN_MESSAGE); 
} 
else 
{//这里开始写盘 
System.out.println("写盘"); 
write2txt(); 
} 
} 
} 
b1.addActionListener(new Listener_ok()); 

class Listener_cancel implements ActionListener 
{//“取消”按钮监听类 
public void actionPerformed(ActionEvent e) 
{ 
System.exit(1); 
} 
} 
b2.addActionListener(new Listener_cancel()); 


fra.add(j1); 
fra.add(j3); 
fra.add(j2); 
fra.add(j4); 
fra.add(b1); 
fra.add(b2); 
fra.setSize(300,150); 
fra.setVisible(true); 

} 


static public void main(String args[]) 
{ 
test_login w1 = new test_login(); 
w1.create(); 
} 
}