How to Reverse the String in Java

Step-by-Step Guide

1. 1

   Step 1: Use the reverse method of the StringBuffer class in the JDK.

   The code snippet for reverse method is as follows: public String reverse(String str) { if ((null == str) || (str.length() <= 1)) { return str; } return new StringBuffer(str).reverse().toString(); } , Reversal using StringBuufer is also an option. public String reverse(String str) { if ((null == str) || (str.length() <= 1)) { return str; } StringBuffer reverse = new StringBuffer(str.length()); for (int i = str.length()
   - 1; i >= 0; i--) { reverse.append(str.charAt(i)); } return reverse.toString(); } } , public String reverse(String str) { if ((null == str) || (str.length() <= 1)) { return str; } return reverse(str.substring(1)) + str.charAt(0); } ,
2. 2

   Step 2: Appending to a StringBuffer: StringBuffer is an apt choice to create and manipulate dynamic string information.

3. 3

   Step 3: A recursive function can also be used to reverse a string.

4. 4

   Step 4: CharArray can be used to reverse as follows: public String reverse(String str) { if ((null == str) || (str.length() <= 1)) { return str; } char[] chars = str.toCharArray(); int length = chars.length - 1; for (int i = 0; i < length; i++) { char tempVar = chars; chars= chars; chars= tempVar; } return new String(chars); }

Detailed Guide

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