package forExam;

public class Exam {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println(reverseString("  hello     world in java"));
    }

    public static String reverseString(String str)
    {
        String res = "";
        String tempstr = "";
        for(int i = 0; i < str.length() ; i++)
        {
            if(str.charAt(i) == ' ')
            {
                if(tempstr != ""){
                    res = tempstr + " "+ res;
                    tempstr = "";
                }
            }
            else
            {
                tempstr = tempstr + str.charAt(i);
                if(i == str.length()-1)
                {
                    res = tempstr + " "+ res;
                }
            }
        }
        return res;
    }
}