Inner classes in Java - Non static variable error

Question

Im still new to java and i tried to create a inner class and call the method inside main. But theres a compilation error saying \"Non static variable - This cannot be refere

Answer 1

An inner class needs a reference to an instance of the outer class in order to be constructed. If your class doesn't logically need that, then use the static modifer to make it "just a nested class":

public static class Class2 {
    public void newMethod(){
        System.out.println("Second class");
    }
}

EDIT: To create an instance of Class2 as an inner class, you could use something like:

Class1 outer = new Class1();
Class2 myObject = outer.new Class2();

Or more briefly:

Class2 myObject = new Class1().new Class2();

... but unless you really want a reference to an enclosing instance, it's much simpler to make the class just a nested class.