AshrafAli_007.txt

// Q. 1>
package PracticalTest1;
abstract class Account
{
	abstract void calcInt();
}
class Saving extends Account
{
	void calcInt() {
		System.out.println("In Saving");
	}
}
class Current extends Account
{
	void calcInt() {
		System.out.println("In Current");
	}
}
class RD extends Account
{
	void calcInt() {
		System.out.println("In RD");
	}
}

public class AcDemo {
	static void perform(Account ref)
	{	
		ref.calcInt();

	}
	public static void main(String []args) {
		perform(new Saving());
		System.out.println("Done");
}
}

Q.2>

package PracticalTest1;

public class NumberPattern {
	public static void main(String []args) 
	{
		for (int i=1; i<=4; i++)
		{
			for(int k=1; k<=i; k++)
			{
			   System.out.print(k);
			}
			System.out.println();				
			}
		}
	}