inheritance problem

[ajithsasi kumar]

import java.io.*;
 
class A
{
public String name[]=new String[3];
int i;
 
public void read1()
{
BufferedReader b=new BufferedReader(new 
 
InputStreamReader(System.in));
try
{
for(i=0;i<3;i++)
{
System.out.print("Enter NAME OF STUDENT :");
name[i]=b.readLine();
}
}
 
catch(IOException e)
{
System.out.println("Error");
}
//System.out.println(name[0]);
//System.out.println(name[1]);
//System.out.println(name[2]);
 
}

}
 
public class B extends A
{
int i;

public void display()
{
 
for(i=0;i<3;i++)
{
System.out.println(name[i]);
}

}
 
public static void main(String args[])
{

A a=new A();
B b=new B();
a.read1();
b.display();

}
}

the names are displayed as null in the display method of the main class. Why it is not possible to get the values. Sir Help me...

[Sandeep Mukherji]

Make a slight change:

    
public class B extends A {
int i;
A a;
B(A a){
this.a = a; // referance of A is to be taken
}
public void display() {
for (i = 0; i < 3; i++) {
System.out.println(a.name[i]);
}
}
 
public static void main(String args[]) {
A a = new A();
B b = new B(a); // referance of a passed
a.read1();
b.display();
}
}

You were using the overrided version of the name in class B. You had to take the name of the Class A only.

[Seetharaman Venkatasamy]

Thanks Sandeep

[Sandeep Mukherji]

I said:

You were using the overrided version of the name in class B

Actually you were hiding the field 'name' in your class B. Pardon me for saying 'Overriding'.

[ajithsasi kumar]

Thank You 'Sandeep Mukherji' for your reply