Program to throw a user-defined exception "String Mismatch Exception", if two strings are not equal (ignore the case)

This is a simple program in which we have two checked two strings for equality. If they are equal then print "String matched !!!" otherwise throw user-defined exception. The euqlasIgnoreCase( ) method of java.lang.String class is used to compare two strings by ignoring case considerations.

PROGRAM
import java.util.Scanner;

class StringMismatchException extends Exception {
 
 public StringMismatchException(String str) {
  
  System.out.println(str);
 }
}
public class StringExcDemo {

 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("Hello"))
    System.out.println("String matched !!!");
   else
    throw new StringMismatchException("String not matched ???");
  }
  catch (StringMismatchException s) {
   System.out.println(s);
  }
 }

}
OUTPUT 1 
C:\>javac StringExcDemo.java
C:\>java StringExcDemo
Enter the string :: Hello
Strings matched !!!
OUTPUT 2 
C:\>javac StringExcDemo.java
C:\>java StringExcDemo
Enter the string :: HELLO
String matched !!!
OUTPUT 3 
C:\>javac StringExcDemo.java
C:\>java StringExcDemo
Enter the string :: Hi
Strings mismatch ???
exception.StringMismatchException

Popular posts from this blog

Program to define a class 'employee' with data members as empid, name and salary. Accept data for 5 objects using Array of objects and print it.

This program demonstrates you the array of objects.  Array of object  is the collection of objects of the same class. The given syntax will define an array of reference therefore assign object to individual reference in the array to declare the array of object. The syntax to define array of object is: <class-name> <array-name> [size]; For example, the following statement will define an array of object having size 6 references to the class  Box . Box b[6]; For creating an array of objects (allocating memory) you have to write down the following statements for (int i=0; i<6; i++) { b[i] = new Box(); // Assigning object to individual reference in the array. } PROGRAM import java.util.Scanner; public class Employee { int empid; String name; float salary; public void getInput() { Scanner in = new Scanner(System.in); System.out.print("Enter the empid :: "); empid = in.nextInt(); System.out.print("Enter the name :: ");
Read more

Define a class Student with four data members such as name, roll no.,sub1, and sub2. Define appropriate methods to initialize and display the values of data members. Also calculate total marks and percentage scored by student.

In this program, first we first create a class  Student  which have data members  name, roll_no, sub1, sub2  and one method to read data here  getdata( )  method and show the result here  show( )  method. We have used  java.io.BufferedReader  class to read data from keyboard at runtime. Then we have created an object of Student class in  StudentDemo  class and called the methods of Student class. When you compile the code using  javac StudentDemo.java  command two .class files will be created which are  Student.class  and  StudentDemo.class , this has the advantage that you can reuse your .class file somewhere in other projects without compiling the code again. You can create as many classes as you want but writing many classes in a single file is not recommended as it makes code difficult to read rather you can create single file for every class. You can also group classes in packages for easily managing your code. PROGRAM import java.lang.*; import java.io.*; class Student
Read more