Java Program to reverse a given String with preserving the position of space.

You can reverse the contents of a given String using leaving the spaces using the reverse() method of the StringBuffer class.

Example

public class Test {
   public static void main(String args[]) {
      String str = "hi welcome to Tutorialspoint";
      String strArray[] = str.split(" ");
      StringBuffer sb= new StringBuffer(str);
      sb.reverse();
      for(int i=0 ; i<str.length(); i++){
      if(str.charAt(i)== ' '){
         sb.insert(i, " ");
      }
   }
   sb.append("");
   System.out.println(sb);
}

Output

tn iopslai ro tuT ot emoclew ih