Question

Possible Duplicate:
What is the reason behind “non-static method cannot be referenced from a static context”?
Cannot make a static reference to the non-static method
cannot make a static reference to the non-static field

I am not able to understand what is wrong with my code.

class Two {
    public static void main(String[] args) {
        int x = 0;

        System.out.println("x = " + x);
        x = fxn(x);
        System.out.println("x = " + x);
    }

    int fxn(int y) {
        y = 5;
        return y;
    }
}

Exception in thread “main” java.lang.Error: Unresolved compilation problem:
Cannot make a static reference to the non-static method fxn(int) from the type Two

Answer 1

Since the main method is static and the fxn() method is not, you can’t call the method without first creating a Two object. So either you change the method to:

public static int fxn(int y) {
    y = 5;
    return y;
}

or change the code in main to:

Two two = new Two();
x = two.fxn(x);

Read more on static here in the Java Tutorials.