Simple screenshot that explains the non-static invocation.

Here is the code:

 /*
 Instance invocation in the memory:

 */
 package kju.obj;

 import static kju.print.Printer.*;
 public class NonStaticInvoke {
     public static void main(String[] args) {
         Person p = new Person("lily");
         p.setName("lucy");
     }
 }

 class Person {
     public static final String country = "cn";
     private String name;
     public Person(String name) {
         this.name = name;
     }

     public static void showCountry() {
         println("country = " + country);
     }

     public void setName(String name) {
         this.name = name;
     }
 }

The figure below corresponds to the above code: