Monday, 23 May 2011

Reverse a string and sorting in alphabetical order using java

   /**
      * read a string and reverse it and then write in alphabetical order.
     */
     import java.io.*;
     import java.util.*;

     class ReverseAlphabetical {

           String reverse(String str) {
               String rStr = new StringBuffer(str).reverse().toString();
               return rStr;
           }


           String alphaOrder(String str){
               char[] charArray = str.toCharArray();
               Arrays.sort(charArray);
               String aString = new String(charArray);
                return aString ;
           }

           public static void main(String[] args) throws IOException {
              System.out.print("Enter the String : ");
             BufferedReader br =new BufferedReader(new InputStreamReader(System.in));
              String inputString = br.readLine();
              System.out.println("String before reverse : " + inputString);
              ReverseAlphabetical obj = new ReverseAlphabetical();
              String reverseString = obj.reverse(inputString);
              String alphaString = obj.alphaOrder(inputString);
              System.out.println("String after reverse : " + reverseString);
              System.out.println("String in alphabetical order : " + alphaString);
           }
      }
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