Which method is looked first by Compiler , Static or instance method when ClassName.method() is used?

Question

I want to get proper understanding why below compilation error? As per my understanding If i use Test.xyz() then compiler look for only static method not for instance method

Answer 1

You have no return type here:

public static xyz(Integer i) {
}

This should be void, if there is nothing to return:

public static void xyz(Integer i) {
}

And also, you need to make the first method static too:

public static void xyz(int i) {
}

So it can be called out of the static main method. It is not possible to call non-static methods out of static methods. More detailed explanation on this: calling non-static method in static method in Java