Click here to watch in Youtube :
https://www.youtube.com/watch?v=q1yPqx3HB4o&list=UUhwKlOVR041tngjerWxVccw

Click the below Image to Enlarge

Java Tutorial : Java Class Methods or Static Methods

public class ClassMethodTest
{

    public static void main(String[] args)
    {
        ClassMethodTest.display("Hello");

        ClassMethodTest classMethodTest = new ClassMethodTest();

        /*
         * You can also refer to static methods with an object reference like
         * below. but this is discouraged because it does not make it clear that
         * they are class methods.
         */
        classMethodTest.display("Peter");
    }

    /*
     * Static methods, which have the static modifier in their declarations,
     * should be invoked with the class name, without the need for creating an
     * instance of the class.
     */
    public static void display(String str)
    {
        System.out.println(str);
    }

}