JAVA GUI:有人可以帮我检查为什么我的按钮不响应被单击吗?

问题描述 投票:0回答:1

我是JAVA GUI的新手,我刚刚开始学习,我开始编写此简单的身份验证框,而且我不确定为什么我的“ fogotpassword”按钮没有在“ else if(event.getSource() == forgotpassword)”中的方法。当我单击它时,什么也没有发生。其下的System.out.println(“ s”)无法打印。

非常感谢您的帮助:)。祝你有美好的一天。

public class miniProject extends JFrame
{
    private JTextField UsernameBox;
    private JPasswordField passwordField;
    private JButton forgotpassword;
    private JButton buttonLogin; 

public miniProject()
{
    super("Login Page");
    setLayout(new GridLayout(3, 2,5,10));
    setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);

    JLabel username = new JLabel("                          Username:");
    //username.setEditable(false);
    add(username);

    UsernameBox = new JTextField(10);
    add(UsernameBox);

    //item3.setEditable(false);
    JLabel passowrd = new JLabel("                          Password:");
    add(passowrd);

    passwordField = new JPasswordField(10);
    add(passwordField);

    buttonLogin = new JButton("Login");
    add(buttonLogin);

    forgotpassword = new JButton("Forgot My Password");
    add(forgotpassword);

    thehandler handler = new thehandler();
    UsernameBox.addActionListener(handler);
    passwordField.addActionListener(handler);
    buttonLogin.addActionListener(handler);
    forgotpassword.addActionListener(handler);
}

private class thehandler implements ActionListener
{
    int i =5;
    public void actionPerformed(ActionEvent event)
    {
        String string = "";
        if (event.getSource()== passwordField || event.getSource()== UsernameBox ||event.getSource()==buttonLogin)
        {
            String password="";
            if(passwordField.getPassword().length != 0 && UsernameBox.getText().length()!=0 )
            {
                for (char a :passwordField.getPassword())
                {
                    password +=a;
                }
                password = password.trim();
                if (password.equals("kyle") && UsernameBox.getText().equals("marcus"))
                {
                    string = String.format("Welcome Back!", event.getActionCommand());
                    JOptionPane.showMessageDialog(null, string);
                }
                else 
                {
                    string = String.format("Incorrect Password\n "+i+" more attempts remaining until your account is locked", event.getActionCommand());
                    JOptionPane.showMessageDialog(null, string);
                    i--;
                }
            }
            else if (event.getSource()==forgotpassword)
            {
                System.out.println("s");
                String input = JOptionPane.showInputDialog("Enter your email");
                if (input.length()!=0)
                {
                    JOptionPane.showInternalMessageDialog(null, "Check your email to reset password!", "Password Reset",JOptionPane.PLAIN_MESSAGE);
                }
            }
            else if (passwordField.getPassword().length == 0)
            {
                string = String.format("You didn't enter your password!",event.getActionCommand());
                JOptionPane.showMessageDialog(null, string);
            }
            else if (UsernameBox.getText().length()==0)
            {
                string = String.format("You didn't enter your username!",event.getActionCommand());
                JOptionPane.showMessageDialog(null, string);
            }
        }
    }
}

}

java swing user-interface awt
1个回答
1
投票

该代码似乎没有按预期方式工作,因为if方法第二行中的actionPerformed不包含检查条件(如果忘记密码按钮是事件源)。您必须将此检查添加到外部if或将else if (event.getSource()==forgotpassword)移到外部if之外。

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