Savitribai Phule Pune University T.Y.B.B.A.(C.A.) Core Java Practical Slip 20 Answers

 

Slip 20 A) Write a java program using AWT to create a Frame with title “TYBBACA”, background color RED. If user clicks on close button then frame should close.

Answer :

 import javax.swing.*;

import java.awt.*;

 

class Slip20A {

    public static void main(String args[]) {

        JFrame frame = new JFrame("TYBBACA");

        frame.setSize(400, 400);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.getContentPane().setBackground(Color.RED);

        frame.setVisible(true);

    }

}

Output :

 

Slip 20 B) Construct a Linked List containing name: CPP, Java, Python and PHP. Then extend your java program to do the following:

i. Display the contents of the List using an Iterator

ii. Display the contents of the List in reverse order using a List Iterator.

Answer :

import java.util.*;

    public class Slip20B{

        public static void main (String args[]){

            LinkedList al = new LinkedList<>();

            al.add("CPP");

            al.add("JAVA");

            al.add("Python");

            al.add("PHP");

            System.out.println("Display content using Iterator...");

            Iterator il=al.iterator();

            while(il.hasNext()){

                System.out.println(il.next());

            }

            System.out.println("Display Content Revverse Using ListIterator");

            ListIterator li1=al.listIterator();

            while(li1.hasNext()){

                li1.next();

            }

            while(li1.hasPrevious()){

                System.out.println("" + li1.previous());

            }

        }

    }

Output :