I got it to work, but need to understand fully how this works.

public class Solution { // class Solution

    public static void main(String[] args) { // static method Solution.main()

        Solution obj = new Solution(); // object creation
        obj.method2(); // normal method call from an object
        method1(); // this is a 'static' call because no object is associated with it
        // because no object is used method1 MUST be static or code wont compile
    }

    public static void method1() { // static method Solution.method1()

    }

    public void method2() { // non static method Solution.method2()

    }
}