0
我有一個按鈕叫login
與if
和else
不知它仍運行時的if
是假的,而不是else
發言,並當我不把任何信息的JTextField
並點擊它仍運行login button
,顯示沒有錯誤需要得到幫助的登錄項目(JAVA)
這裏是代碼:
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");
}
}
}
我改變它,但它給了我在錯誤的if語句這一點,給了我 – Nestor85
局部變量密碼錯誤可能尚未初始化 – Nestor85