密码域控件的简单应用

应用场景：用户注册，密码输入
功能界面：



窗口界面设计部分代码：

public class JPasswordFieldTest extends JFrame {

/**
*
*/
private static final long serialVersionUID = 8633179606754193326L;
private JPanel contentPane;
private JPasswordField passwordField1;
private JPasswordField passwordField2;

/**
* Launch the application.
*/
public static void main(String[] args) {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (Throwable e) {
e.printStackTrace();
}
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
JPasswordFieldTest frame = new JPasswordFieldTest();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}

/**
* Create the frame.
*/
public JPasswordFieldTest() {
setTitle("\u5BC6\u7801\u57DF\u63A7\u4EF6\u7B80\u5355\u5E94\u7528");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 200);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(new GridLayout(3, 1, 5, 5));

JPanel passwordPanel1 = new JPanel();
contentPane.add(passwordPanel1);

JLabel label1 = new JLabel("\u8F93\u5165\u5BC6\u7801\uFF1A");
label1.setFont(new Font("微软雅黑", Font.PLAIN, 16));
passwordPanel1.add(label1);

passwordField1 = new JPasswordField();
passwordField1.setFont(new Font("微软雅黑", Font.PLAIN, 16));
passwordField1.setColumns(20);
passwordPanel1.add(passwordField1);

JPanel passwordPanel2 = new JPanel();
contentPane.add(passwordPanel2);

JLabel label2 = new JLabel("\u786E\u8BA4\u5BC6\u7801\uFF1A");
label2.setFont(new Font("微软雅黑", Font.PLAIN, 16));
passwordPanel2.add(label2);

passwordField2 = new JPasswordField();
passwordField2.setFont(new Font("微软雅黑", Font.PLAIN, 16));
passwordField2.setColumns(20);
passwordPanel2.add(passwordField2);

JPanel buttonPanel = new JPanel();
contentPane.add(buttonPanel);

JButton submitButton = new JButton("\u63D0\u4EA4");
submitButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_submitButton_actionPerformed(e);
}
});
submitButton.setFont(new Font("微软雅黑", Font.PLAIN, 18));
buttonPanel.add(submitButton);
}

判断部分代码：

protected void do_submitButton_actionPerformed(ActionEvent e) {
char[] password1 = passwordField1.getPassword();
char[] password2 = passwordField2.getPassword();
if (password1.length < 6) {
JOptionPane.showMessageDialog(this, "密码长度小于6位", "", JOptionPane.WARNING_MESSAGE);
} else if (!Arrays.equals(password1, password2)) {
JOptionPane.showMessageDialog(this, "两次密码不同", "", JOptionPane.WARNING_MESSAGE);
} else {
JOptionPane.showMessageDialog(this, "两次密码相同", "", JOptionPane.INFORMATION_MESSAGE);
}
}

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