我有一个名为login
的按钮,带有if
和else
,不知怎的,当if
是时它仍然运行false 而不是 else
语句,并且当我没有在 JTextField
中放置任何信息并单击登录按钮
时,它仍然运行,没有显示错误
这是代码:
public static void main(String [] args){
JFrame frame = new JFrame();
frame.setTitle("User Log In");
frame.setSize(500,300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
//Labeling
JLabel title = new JLabel("Please Log In");
frame.add(title);
JLabel user = new JLabel("UserName:");
frame.add(user);
JLabel pass = new JLabel("Password:");
frame.add(pass);
// Set the location on the frame
title.setBounds(200, -25, 120, 145);
user.setBounds(150,50,100,50);
pass.setBounds(150,90,100,50);
//Input Border
JTextField userField = new JTextField();
frame.add(userField);
userField.setBounds(250,65,80,20);
JPasswordField passField = new JPasswordField();
frame.add(passField);
passField.setBounds(250,105,80,20);
//Button
JButton but1 = new JButton("LOGIN");
frame.add(but1);
but1.addActionListener(new Action());
but1.setBounds(200,150,100,20);
}
static class Action implements ActionListener{
public void actionPerformed (ActionEvent e){
int password = 1234;
if (password == 1234){
JFrame frame = new JFrame();
frame.setVisible(true);
frame.setSize(500,300);
JLabel label = new JLabel("Welcome To My Game");
frame.setLocationRelativeTo(null);
JPanel panel = new JPanel();
frame.add(panel);
panel.add(label);
}
else {
JOptionPane.showMessageDialog(null, "Incorrect Password Try Again");
}
}
}
最佳答案
int password = 1234;
if (password == 1234){
因为密码是1234,而且永远都是这样。因此,其他情况永远不会发生。 您实际上并没有检查用户输入。
关于java - 需要登录项目的帮助(JAVA),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40228756/