Abstract Class

package Lec49;

public class Client {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Stack_Interface_use cs = new Stack_Interface_use();
		cs.display();
		cs.push();
		System.out.println(StackI.val);

	}

}


package Lec49;

public abstract class BankAccount {

	public  abstract boolean payment() ;

	public  int accountbalnec() {
		return 1000;
	}
	
}

package Lec49;

public  abstract class Abstract_Demo {

	public abstract int fun();

	public void fun1() {

	}
	
	
	
}


package Lec49;

public class AbstractClient {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Abstract_Demo ab = new  Abstract_Demo();
		ab.fun();
		ab.fun1();
	}

}