How to Reverse String in Core Java

package com.javapractice;

public class ReverseString {

public static String reverseString(String str){

char[] ch=str.toCharArray();

for(int i=ch.length-1;i>=0;i--){

System.out.println(ch[i]);

//String str1=""+ch[i];

}

String str1=new String();

System.out.println(ch);

return str;

}

public static String reverseStringStringButtfer(String str){

StringBuffer bf=new StringBuffer(str);

bf.reverse();

System.out.println(bf);

return str;

}

public static void main(String[] args){

reverseString("javaiseasy");

reverseStringStringButtfer("selenium");

}

}