Skip to main content

Develop a program to accept a Password from the user and throw “Authentication Failure” exception if the password is incorrect

import java.util.*;
class Test
{
  public static void main(String args[])
  {
    try
    {
      System.out.println("Enter Password: ");
      Scanner obj=new Scanner(System.in);
      String pass= obj.nextLine();
      if(!pass.equals("1234"))
         System.out.println("Authentication Failure");
      else
         System.out.println("Welcome....!!");
     }
     catch (Exception e)
     {
       System.out.println("");
     }
     finally
     {
       System.out.println("Thank You.........!!!!!");
     }
   }
}

Comments

Popular posts from this blog

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: