用JAVA做一个登陆窗口要输入账号和密码密码输错3次就提示被锁定要有退出按钮
这个是用java se 做的 代码不复杂，就是 MyEclipse自动生成了一些页面布局的代码，对程序没什么影响，如果你不喜欢或者嫌复杂稍微改一下就可以了，因为大半夜了，布局我也不可能给你手写去，挺麻烦的。见谅。怎么还要用云盘呀 干脆再给你贴上来吧。就是布局那块 有点乱。
import javax.swing.JOptionPane;
public class Login extends javax.swing.JFrame {
int flag = 3;
private java.awt.Button button1;
private java.awt.Button button2;
private javax.swing.JPasswordField jPasswordField1;
private java.awt.Label label1;
private java.awt.Label label2;
private java.awt.TextField textField1;
/** Creates new form Login */
public Login() {
flag=3;
initComponents();
this.setVisible(true);
button1.setEnabled(true);
}
//这个方法里的代码是 工具自动生成的窗体布局代码。直接用就可以，如果你不喜欢你就自己稍微修改一下就可以。直接运行一点问题没有。
private void initComponents() {
label1 = new java.awt.Label();
textField1 = new java.awt.TextField();
label2 = new java.awt.Label();
jPasswordField1 = new javax.swing.JPasswordField();
button1 = new java.awt.Button();
button2 = new java.awt.Button();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
label1.setName("");
label1.setText("\u7528\u6237\u540d\uff1a");
textField1.setName("user");
label2.setText("\u5bc6\u7801\uff1a");
jPasswordField1.setName("password");
button1.setLabel("\u767b\u5f55");
button1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
button1ActionPerformed(evt);
}
});
button2.setLabel("\u9000\u51fa");
button2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
button2ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(
getContentPane());
getContentPane().setLayout(layout);
layout
.setHorizontalGroup(layout
.createParallelGroup(
javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(
layout
.createSequentialGroup()
.addGroup(
layout
.createParallelGroup(
javax.swing.GroupLayout.Alignment.LEADING,
false)
.addGroup(
layout
.createSequentialGroup()
.addGap(
63,
63,
63)
.addGroup(
layout
.createParallelGroup(
javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(
label1,
javax.swing.GroupLayout.PREFERRED_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(
label2,
javax.swing.GroupLayout.PREFERRED_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(
40,
40,
40)
.addGroup(
layout
.createParallelGroup(
javax.swing.GroupLayout.Alignment.LEADING,
false)
.addComponent(
jPasswordField1)
.addComponent(
textField1,
javax.swing.GroupLayout.DEFAULT_SIZE,
90,
Short.MAX_VALUE)))
.addGroup(
layout
.createSequentialGroup()
.addGap(
114,
114,
114)
.addComponent(
button1,
javax.swing.GroupLayout.PREFERRED_SIZE,
53,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(
29,
29,
29)
.addComponent(
button2,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
Short.MAX_VALUE)))
.addContainerGap(155, Short.MAX_VALUE)));
layout
.setVerticalGroup(layout
.createParallelGroup(
javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(
layout
.createSequentialGroup()
.addGap(82, 82, 82)
.addGroup(
layout
.createParallelGroup(
javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(
textField1,
javax.swing.GroupLayout.PREFERRED_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(
label1,
javax.swing.GroupLayout.PREFERRED_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(26, 26, 26)
.addGroup(
layout
.createParallelGroup(
javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(
label2,
javax.swing.GroupLayout.PREFERRED_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(
jPasswordField1,
javax.swing.GroupLayout.PREFERRED_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(38, 38, 38)
.addGroup(
layout
.createParallelGroup(
javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(
button1,
javax.swing.GroupLayout.PREFERRED_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(
button2,
javax.swing.GroupLayout.PREFERRED_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(84, Short.MAX_VALUE)));
button1.getAccessibleContext().setAccessibleName("");
pack();
}// </editor-fold>
private void button2ActionPerformed(java.awt.event.ActionEvent evt) {
System.exit(0);
}
@SuppressWarnings("deprecation")
private void button1ActionPerformed(java.awt.event.ActionEvent evt) {
String user = textField1.getText();
String pass = jPasswordField1.getText();
System.out.println(user);
System.out.println(pass);
if ("admin".equals(user) && pass.equals(pass)) {
JOptionPane.showMessageDialog(null, "登录成功");
this.setVisible(false);
} else {
flag--;
JOptionPane.showMessageDialog(null, "登录失败，还有"+flag+"次机会");
}
if (flag <= 0) {
button1.setEnabled(false);
}
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Login().setVisible(true);
}
});
}
}
