Reference Array

First we will have to create the any class, Here Student Class

class Student

 {

      private int y;

      private String x;

 Student(String s,int r)

 {

x=s;

y=r;

 }

     public void SetRollNo(int x)

       {

            y = x;

  }

public void SetName(String v)

       {

           x = v;

       }

public String  GetName(){

                      return x;

                    }

     public int GetRollNo(){

                     return y;

                     }

 

     }

In the following case array is directly initialized

class RefArrayDemo

{

public static void main(String args[])

{

//reference array std[] is created which contains the address of attributes of Student class.....

//by using new keyword object is created............

Student std[]={new Student("VIKESH",1240),

  new Student("VED PRAKASH",1243),

  new Student("ABBHISHEK",1260)

 };//here in this case reference array is directly initialized

   for(int i=0;i<std.length;i++)

{

String s = std[i].GetName();//by using that reference array we can access the GetName() method

int r =std[i].GetRollNo();//by using that reference array we can access the GetRollNo() method

System.out.println(s +"\t"+r);

}

}

}

In the following case array is initialized by user

import java.util.*;

class RefArrayDemo1

{

public static void main(String args[])

{

Student std[]= new Student[5];

Scanner scan = new Scanner(System.in);

//enter the different value of x and y

for(int i=0;i<std.length;i++)

{

   System.out.println("ENTER THE VALUE OF X:");

String s =scan.next();

System.out.println("ENTER THE VALUE OF Y:");

int n = scan.nextInt();

std[i] = new Student(s,n);  //the reference array std[] holds the different addresses of objects 

}

for(int i=0;i<std.length;i++)

{

String s = std[i].GetName();  //calling of method defined in the given class

int n = std[i].GetRollNo();

System.out.println("X: "+s+"\t"+"Y:"+n);

}

}

}