First and last character reverse in word

public class charswapp {

public static void main(String[] args) {
// TODO Auto-generated method stub

String s="pavan";

char[] chArray=s.toCharArray();

for(int i=0;i < chArray.length;i++){
char temp=chArray[0];
chArray[0]=chArray[chArray.length-1];
chArray[chArray.length-1]=temp;
System.out.print(chArray[i]);
}

}

}