Functions: Class, Instance and Constructor

testparent.java

public class testparent { public static void main(String[] args) { parent.hello();                     // 3. class function parent p1 = new parent();           // 1. constructor function p1.display();                       // 2. instance function parent p2 = new parent("ALICE");    // 1. overload constructor function p2.display();                       // 2. instance function p1.display();                       // 2. instance function } }

parent.java => super class

public class parent {   // Data Members -------------------------------------------------------------- String name;          // 1. instance variable go to each instance created static int total = 0; // 2. class variable shared by all // Function Members -------------------------------------------------------- // 1. Constructor Functions      //------------------------- parent()                //parent p1 = new parent(); has same name { name = " "; total++; } ------------------------------------------------------------------ parent(String n)        //parent p2 = new parent("some string"); w/arguments {                     //this is an overload construction function name = n; total ++; }      // 2. Instance Function      //--------------------- public void display() { System.out.printf("TOTAL %d NAME: %s \n", total, name ); }      // 3. Class Function      //--------------------- static public void hello() { System.out.printf("HELLO.Welcome.\n");        } }