How to declare class for library like function

Question

Hey guys I want to declare class Math and define method subtrction so that i can use it in other class like
package p1
public class Math
Math( ){}
int Subtration ( int a, int b)
return (a-b)
package p2
import p1.*;
Public Class Test
Test()
int somenumber=Math.Subtration(3,4);
For some reason I cannot see any methods inside Math class. when i type
somenumber = Math. it show me only one option and that is 'class' instead of mathods inside Math. any thoughts?
thx

Answer 1

Yes I am aware of Math class in java. The question is
how do i declare a class and call it's method in some
other class with out declaring an object of that
class.
Like I can just call Math.sqrt(4) with out
specifically declaring Math as an object. I want to
declare my own class which has some methods I wish to
call in some other class.MyClass.someMethod(). Just make sure that the methos is actually declared static. I suggest looking up the static keyword to find out what it means.