what is the use of using static methods 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: how to call a static method in java

class scratch{
	public static hey(){
		System.out.println("Hey");
    }
	public static void main(String[] args){
		hey();
        //print Hey to the console
    }