Develop a program to draw any 2 of the following shapes: a) Cone b) Cylinder c) Cube

a. Cone

import java.applet.*;

import java.awt.*;

public class Cone extends Applet

{

public void paint(Graphics g)

{

g.drawOval(80,280,320,100);

g.drawLine(240,50,82,320);

g.drawLine(240,50,398,320);

g.drawLine(240,330,398,330);

g.drawLine(240,50,240,330);

g.drawString("Radius",260,360);

g.drawString("Height",246,255);

g.drawString("Slant Height",340,210);

g.drawString("Cone",220,420);

}

</applet>

b. Cylinder

import java.applet.*;

import java.awt.*;

public class Cylinder extends Applet

{

public void paint(Graphics g)

{

g.drawString("Cylinder",80,50);

g.drawOval(50,60,100,50);

g.drawLine(50,80,50,200);

g.drawLine(150,80,150,200);

g.drawOval(50,180,100,50);

}

<applet code="Cylinder.class"

width=300 height=300>

</applet>

c. Cube

import java.applet.*;

import java.awt.*;

public class Cube extends Applet

{

public void paint(Graphics g)

{

g.drawString("Cube",95,110);

g.drawRect(80,10,50,50);

g.drawRect(95,25,50,50);

g.drawLine(80,10,95,25);

g.drawLine(130,10,145,25);

g.drawLine(80,60,95,75);

g.drawLine(130,60,145,75);

}

</applet>

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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