Program to perform string reverse operation

/* Program to perform string reverse operation */

class P15A
{
    public static void main(String args[ ])
    {
        String str1 = "HOTJAVA";
        StringBuffer str2 = new StringBuffer();       
        int i,j,len = str1.length();
       
        System.out.println("Original String is : "+str1);
        str2.setLength(len);       
        for(i=len-1,j=0;i>=0;i--,j++)
            str2.setCharAt(j, str1.charAt(i));

        System.out.println("Reverse String is : "+str2);
    }
}