CODEWITHSUNDEEP
java
Anonymous
Anonymous

Reputation: 59

Why does this error state "int cannot be dereferenced" for the if statement?

I have looked up several other problems that are similar to mine in Stack Overflow, but none of them help with my issue. So basically, my issue is that the program won't execute because it says "int cannot be dereferenced" for the if statement. How do I solve this issue?

Well I tried to move around the curly brackets, and I tried different methods of .length(), but nothing worked.

private void generateButtonActionPerformed(java.awt.event.ActionEvent evt) {
    int username, password, random;
    username = Integer.parseInt(usernameTextField.getText());
    password = Integer.parseInt(passwordTextField.getText());

    if (password.length() != 7) {
    }
}

I am using the GUI in NetBeans. The variable username and password are for text fields, and as you can see in the code I converted any inputted data for "username" and "password" to numeric values. So for the issue, I expect the if statement to display the length of the variable "password", but it instead shows an error stating, "int cannot be dereferenced"?

Upvotes: 0

Views: 317

Answers (4)

Youcef LAIDANI
Youcef LAIDANI

Reputation: 59988

You have a problem here :

if (password.length() != 7){

int doesn't have length() method, not like String, if you want to check the length of the password field then you can use :

if (passwordTextField.getText().length() != 7) {

Or if you are using the password as an int, and you need to check the length of the int then use :

if (String.valueOf(password).length() != 7) {

Upvotes: 1

Harshal Parekh
Harshal Parekh

Reputation: 6017

The primitive datatype int does not have a method length() nor does its wrapper class have such a method.

You can check the length before parsing it into an integer like:

int username, password, random;

String userName = usernameTextField.getText();
String pass = passwordTextField.getText();

if (userName.length() != 7) {
    // do something
}
if (pass.length() != 7) {
    // do something
}

username = Integer.parseInt(userName);
password = Integer.parseInt(pass);

Hope this helps. Good luck.

Upvotes: 1

rajeshnair
rajeshnair

Reputation: 1673

The compiler error is exactly correct

You have declared password as int and int does not have length method

I think what you want to do is 

private void generateButtonActionPerformed(java.awt.event.ActionEvent evt) {                                               
    String username,password,random;
    username = usernameTextField.getText();
    password = passwordTextField.getText();

    if (password.length() != 7){
    }                                              
}

Upvotes: 1

user9643348
user9643348

Reputation:

The function length() is for Strings, if you want to get the digits of a number you should do like below:

int length = String.valueOf(password).length();

Upvotes: 1

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