Explanation
1304
0
import java.util.*;
public class Strings {
public static void main(String args[]) {
StringBuilder sb = new StringBuilder("HelloWorld");
for(int i=0; i
int front = i;
int back = sb.length() - i - 1;
char frontChar = sb.charAt(front);
char backChar = sb.charAt(back);
sb.setCharAt(front, backChar);
sb.setCharAt(back, frontChar);
}
System.out.println(sb);
}
}