问题描述
这段代码的反面是什么 --> password.getpassword().length == 0
就像检查它是否填满而不是空。
JButton confirm = new JButton("Sign Up");
confirm.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
UserInfo a = new UserInfo();
/*here is my problem I want it to Check if someone inputted a password so I can
proceed to open the second frame */
if(!firstname.getText().trim().isEmpty() && !lastname.getText().trim().isEmpty() && password.getpassword().length == 0 && pass2.getpassword().length == 0
&& !address.getText().trim().isEmpty() )
a.frame2.setVisible(true);
frame.dispose();
if(firstname.getText().trim().isEmpty()) {
missingfirst.setText("Please Add Your First Name.");
}
if(lastname.getText().trim().isEmpty()) {
missinglast.setText("Please Add Your Last Name.");
}
if(password.getpassword().length == 0) {
missingpass.setText("Please Add A Password.");
}
if(pass2.getpassword().length == 0) {
missingrepass.setText("Please Re-Type Your Password.");
}
if(address.getText().trim().isEmpty()) {
missingadd.setText("Please Enter An Address.");
}
else if (!(password.getpassword().equals(pass2.getpassword()))) {
missingrepass.setText("Password Doesn't Match.");
}
}
}
解决方法
使用 password.getPassword().length > 0
或 !password.getPassword().isEmpty()
检查。
我认为在这里您应该验证输入的密码是否为您要求的正确格式,而不是检查是否已填写。