abstruct class SuperClass{

abstruct void display();

}

public class SubClassA extends SuperClass{

public void display(){

System.out.println("SubClassA ");

}

}

public class SubClassB extends SuperClass{

public void display(){

System.out.println("SubClassB ");

}

}

public class PolyTester{

public static void main(String[] argc){

SuperClass sa = new SubClassA();

SuperClass sb = new SubClassB();

SuperClass[] sc = {sa,sb};

for(int i=0; i