Write output of program.

Code:

</applet>

import java.applet.Applet;

import java.awt.*;

public class SetBackgroundColorExample extends Applet

{

public void paint(Graphics g)

{

*Set background color of an applet using

*void SetBackground(Color c)method

setBackground(Color.red);

}

Comments

Program to calculate the room area and volume to illustrate the concept of single inheritance.

CODE: class Roomarea { protected double l, b; Roomarea(double len, double br) { l=len; b=br; } void putdata() { System.out.println("Area of Room: "+(l*b)); } } class Roomvol extends Roomarea { double h; Roomvol(double len, double br, double he) { super(len, br); h=he; } void putdata() { super.putdata(); System.out.println("Volume of Room: "+(l*b*h)); } } public class EXP18Q4 { public static void main(String[] args) { Roomvol r1 = new Roomvol(10, 20, 10); r1.putdata(); } }

Define an exception called ‘NotMatchexception’ that is thrown when a string is not equal to ‘India’. Write a java program that uses this exception.

Code: import java.util.Scanner; class NotMatchException extends Exception { public NotMatchException (String str) { System.out.println(str); } } public class StringExc { public static void main(String[] args) { Scanner scan = new Scanner(System.in); System.out.print("Enter the string : "); String input = scan.nextLine(); try { if(input.equalsIgnoreCase("India")) System.out.println("String matched !!!"); else throw new NotMatchException ("String not matched !!!"); } catch (NotMatchException s) { System.out.println(s); } } } Output:

Develop a program using control loops in applets.

Code: import java.awt.*; import java.applet.*; public class Control extends Applet { public void paint(Graphics g) { for(int i=1;i<=4;i++) { if(i%2==0) { g.fillOval(90,i*50+10,50,50); g.setColor(Color.black); } else { g.fillOval(90,i*50+10,50,50); g.setColor(Color.red); } } } } /* <applet code=Control width=300 height=300> </applet> */ Output:

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