Question

Here is my class:

public class T {
    public  int num = 100;
    private int num2 = -1;

    //inner class
    public static class Inner {
        private int num2 = 250;

        public void method() {
            System.out.println(num2);//calls inner class num
            System.out.println(...);//should print class T num
            System.out.println(...);//should print class T num2
        }   
    }
}

How do I make second and third println to print num and num2 of class T?

Answer 1

You can’t – your Inner class is not an inner class, it is a static nested class. In other words it lives by itself without a reference to an instance of T.

If you remove the static part of your Inner declaration, it will be possible:

public class Inner {
    private int num2 = 250;

    public void method() {
        System.out.println(num2);//calls inner class num
        System.out.println(num);//should print class T num
        System.out.println(T.this.num2);//should print class T num2
    }   
}