How to get access to variables from other class

Question

So I would like to use the variable "kierunek" from this class

public class Snake extends JPanel implements ActionListener{
char kierunek = 'D';

to this class

import pl.java.Snake.*;

public class MyKeyListener extends KeyAdapter {

importing shows "Unused import statement", I tried to find soulution, but there is nothing helping me

score 1 · Accepted Answer · answered Jun 28 '22 at 16:56

With Java you will have to either have to create a public Getter Method, or make the variable itself public.

As a object oriented Language Java differentiates between different access modifiers. More on that here: What is the difference between public, protected, package-private and private in Java?

Usually one should use Getter and Setter as accessors for the variables in order to avoid creating Problems.

score 0 · Answer 2 · answered Jun 28 '22 at 17:13

"Unused import statement" Means that you haven't used your imported class yet.

It triggers for any class, like for example, good old scanner

import java.util.Scanner;

You will get the same warning until you use said class it. In this case, by creating a Scanner object:

Scanner input = new Scanner(System.in);

Also, do you have both of your classes inside the same package? If so, you don't have to import it, you can just call it.

(Like Daniel said, I recommend using setters and getters when interacting with your class attributes so you can keep them private)

2 Answers2