abstract class Demo{
         public Demo(){
                 this.print();
         }        
        public abstract void print();
 };
 
class DemoImpt extends Demo{        
        private int x = 10;        
           public DemoImpt(int x){
                    this.x = x;
            }
            public void print(){
                    System.out.println("x=" + this.x );
            }
 }
 
public class CaseDemo{
         public static void  main(String args[]){
                 new DemoImpt(100);
         }
 }