Blog

There are many ways to reverse String in Java. We can reverse a String using factory inbuilt method, loop iteration etc.

Program to Reverse a String using loop

class ReverseString {
  public static void main(String args[]) {
    String main = "proedu";

    String rev = "";

    int length = main.length();

    for (int i = length - 1; i >= 0; i--){
      rev = rev + main.charAt(i);
}
    System.out.println("Reverse of the string is : " + rev);
  }
}

Output

Reverse of the string: udeorp

Program to Reverse a String using Factory  inbuilt method

Using StringBuffer().reverse() method

class ReverseString {
  
  public static void main(String args[]) {
    
    StringBuffer sb = new StringBuffer("proedu");
    System.out.println("Reverse of the string is :" + sb.reverse());
  }
}

Output

Reverse of the string is :udeorp

Using StringBuilder.reverse() method

class ReverseString {
  
  public static void main(String args[]) {
    
    StringBuilder sb = new StringBuilder("proedu");
    System.out.println("Reverse of the string is :" + sb.reverse());
  }
}

Output

Reverse of the string is :udeorp

Program to Reverse a String using Recursion

class ReverseString {

  public static String reverse(String originalStr) {
    if (originalStr.length() == 0){
      return " ";
    }
    return originalStr.charAt(originalStr.length() - 1) + reverse(originalStr.substring(0, originalStr.length() - 1));
  }

  public static void main(String[] args) {

    String strValue = "proedu java";
    System.out.println("Reverse of the string is :: " + reverse(strValue));

  }
}

Output

Reverse of the string is :: avaj udeorp