Monday 10 July 2017

Write a program to reverse a string using recursive algorithm.


Description:
Write a program to reverse a string using recursive methods.
You should not use any string reverse methods to do this.

Code:
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package com.govindsblog.algos;
 
public class StringRecursiveReversal {
 
    String reverse = "";
     
    public String reverseString(String str){
         
        if(str.length() == 1){
            return str;
        } else {
            reverse += str.charAt(str.length()-1)
                    +reverseString(str.substring(0,str.length()-1));
            return reverse;
        }
    }
     
    public static void main(String a[]){
        StringRecursiveReversal srr = new StringRecursiveReversal();
        System.out.println("Result: "+srr.reverseString("govindsblog"));
    }
}

Output:
Result: golbsdnivog

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