why we use static function in java code example

Example 1: do i have to use static methods in java main

Use a static method 
when you want to be able to access the method 
without an instance of the class

Example 2: Static method in java

We can declare a method as static by adding keyword “static” before method name.
Let’s see example on static method in java.

public class StaticMethodExample
{
   static void print()
   {
      System.out.println("in static method.");
   }
   public static void main(String[] args)
   {
      StaticMethodExample.print();
   }
}