test_login.rar_java 登录界面

/** * @(#)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(); } }