Data Hiding

If a subclass is having a data member with same name as superclass data member then inside subclass, subclass data member hides superclass data member.
class Sample{
 int a = 5;
}
class SubSample extends Sample{
 int a = 6;
 void display(){
  System.out.println("\n a="+a);
 }
}
class InheritanaceDemo14{
 public static void main(String[] args){
   SubSample s = new SubSample();
   s.display();
   System.out.println("\n s.a="+s.a);
 }
}
output:
a = 6
s.a = 6