JAVA J2SE SWING AWT 登录界面 输入用户名和密码 登录器
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
/**
* @author greatwqs
* @date 2009年10月19日
*/
public class loginFrame extends JFrame {
public loginFrame() {
super("管理系统登陆");
this.setBounds(280, 280, 300, 200);
setLayout(new BorderLayout());
// 设置登陆界面的宽度和高度
JPanel p1 = new JPanel();
p1.setLayout(new GridLayout(2, 2));
p1.add(userL);
p1.add(user);
p1.add(passwordL);
p1.add(password);
p1.setSize(150, 100);
JPanel p2 = new JPanel();
p2.add(ok);
p2.add(cancel);
add("North", p1);
add("Center", p2);
add("South", cue);
// 到此为止,登陆的界面基本结束!下面的是为里面的按钮设置具体的事件监听器
cancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});// 设置登陆时的取消按钮,按这个按钮就退出所有的程序
ok.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if ((user.getText()).equals("team")
&& String.valueOf((password.getPassword())).equals(
"team")) {
result = true;
// hidFun();
JOptionPane.showMessageDialog(null, "你好:你登陆成功,进入系统!");
} else {
// cue.setText("你输入的密码错误!");
JOptionPane.showMessageDialog(null, "你好:你输入的密码错误,请重新输入!");
}
}
}
);// 设置ok键的事件监听器,并验证用户名和密码,密码输入错误时提示"您输入的密码错误!"
}
public boolean isLogin() {
return result;
}
/**
* 设置本界面隐藏..
*
*/
private void hidFun() {
this.setVisible(false);
}
private JLabel userL = new JLabel("用户名");
private JLabel passwordL = new JLabel("密码");
private JLabel cue = new JLabel();
private JTextField user = new JTextField("team");
private JPasswordField password = new JPasswordField();
private JButton ok = new JButton("确定");
private JButton cancel = new JButton("退出");
private boolean result = false;
/**
* 主函数.....
*
* @param wqs
*/
public static void main(String[] wqs) {
loginFrame oop = new loginFrame();
oop.setVisible(true);
oop.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class NULLLayoutDemo extends JFrame implements ActionListener {
private JLabel lbUser = new JLabel();
private JLabel info = new JLabel();
private JLabel lbPassword = new JLabel();
private JButton btnLog = new JButton();/* 该行有错误什么问题呀 */
private Container container = getContentPane();
private JTextField jtextfield_1 = new JTextField(10);
private JPasswordField jtextfield_2 = new JPasswordField(10);
public NULLLayoutDemo() {
super("登陆器");
this.setSize(350, 200);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
NULLLayoutDemo frame = new NULLLayoutDemo();
frame.setLayout();
frame.setVisible(true);
}
public void setLayout() {
container.setLayout(null);
lbUser.setText("用户名");
container.add(lbUser);
container.add(jtextfield_1); // 增加输入用户名的文本框
jtextfield_1.setBounds(80, 26, 120, 26);// 设置用户名的文本框位置
lbUser.setBounds(16, 26, 42, 16);
lbPassword.setText("密码");
container.add(lbPassword);
lbPassword.setBounds(16, 56, 40, 16);
btnLog.setText("登陆");
jtextfield_2.setEchoChar('$');
container.add(jtextfield_2);// 设置密码的文本框位置
jtextfield_2.setBounds(80, 56, 120, 26);// 增加输入密码的文本框
container.add(btnLog);
btnLog.addActionListener(this);
btnLog.setBounds(125, 101, 73, 25);
info.setBounds(0, 130, 300, 35); // 设置信息的标签
info.setText("用户名是：name 密码是：password");
container.add(info);
/*
* public void ceshi(){ if() }
*/
}
public void actionPerformed(ActionEvent e) {
String name = jtextfield_1.getText(); // 取得用户名文本框的信息
String password = jtextfield_2.getText();// 取得密码文本框的信息
// 判断是否符合条件
if ("name".equals(name) && "password".equals(password)) {
JOptionPane.showMessageDialog(this, "恭喜你！输入正确", "通过",
JOptionPane.INFORMATION_MESSAGE, null);
} else {
JOptionPane.showMessageDialog(this, "你的输入错误", "错误",
JOptionPane.INFORMATION_MESSAGE, null);
}
}
}