Reverse word in Java

I would go a different way as i assume, OP is new to logic programming(from his/her question pattern).

Here we are traversing through the length of a word and backtracking them while printing i mean reversing. Have a look at it.

String str = "java";
String revStr = reverseWordByWord(str);

 public String reverseWordByWord(String str){
        int strLeng = str.length()-1;
        String reverse = "", temp = "";

        for(int i = 0; i <= strLeng; i++){
            temp += str.charAt(i);
            if((str.charAt(i) == ' ') || (i == strLeng)){
                for(int j = temp.length()-1; j >= 0; j--){
                    reverse += temp.charAt(j);
                    if((j == 0) && (i != strLeng))
                        reverse += " ";
                }
                temp = "";
            }
        }
        return reverse;
    }