public interface Shape
{
public int area();
}
public class Square implements Shape
{
int a;
public int area()
{
int area = a*a;
System.out.println("Area of an square is "+area);
}
public static void main(String args[]){
a = 50;
Shape s = new Square();
s.area();
}
}
{
public int area();
}
public class Square implements Shape
{
int a;
public int area()
{
int area = a*a;
System.out.println("Area of an square is "+area);
}
public static void main(String args[]){
a = 50;
Shape s = new Square();
s.area();
}
}
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