BlueJ Program On Changing Case Of Letters

In this BlueJ program, user will enter a sentence and the sentence will be displayed after converting every alternate character to uppercase and immediate next character in lowercase                                                                                                                    

import java.io.*;

class CaseChange

{

 BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

 String s1,s2="";

 char ch;

 int i,len,x=0;

  public void takeName() throws Exception

 {

  System.out.println("Enter Name:");

  s1=br.readLine();

  System.out.println("Original Name="+s1);

  len=s1.length();

  for(i=0;i< len;i++)

  {

  ch=s1.charAt(i);

  if(x%2==0 && Character.isLetter(ch))

  ch=Character.toUpperCase(ch);

else  if(x%2==1 && Character.isLetter(ch))

  ch=Character.toLowerCase(ch);

  x++;

s2=s2+ch;

}

 System.out.println("Modified Name="+s2);

    }

    public static void main(String args[]) throws Exception

    {

    CaseChange ob=new CaseChange ();

    ob.takeName();

    }

    }

Sample input and output of the program

Input:  Nasim Akhtar

Output:    NaSiM aKhTeR     

Related Post: BlueJ Programs on String/Sentence