JavaProgramming/StringBuilders/ReverseString.java at main · PrityKumari14/JavaProgramming · GitHub

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//Reverse a String (using StringBuilder class)

package StringBuilders;

import java.util.*;

public class ReverseString {

public static void main(String[] args) {

StringBuilder sb = new StringBuilder("hello");

System.out.println("The original string is :" + sb);

for(int i=0; i<sb.length()/2; i++){

int front = i;

int back = sb.length()-1-i; // 5-1-0 = 4

char frontChar = sb.charAt(front);

char backChar = sb.charAt(back);

sb.setCharAt(front, backChar);

sb.setCharAt(back, frontChar);

}

System.out.print("Reverse string is : ");

System.out.print(sb);

}

//output

The original string is :hello

Reverse string is : olleh

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