Reverse the ordering of words in a string

Question

I have this string s1 = \"My name is X Y Z\" and I want to reverse the order of the words so that s1 = \"Z Y X is name My\".

I can do it u

Answer 1

public class manip{

public static char[] rev(char[] a,int left,int right) {
    char temp;
    for (int i=0;i<(right - left)/2;i++)    {
        temp = a[i + left];
        a[i + left] = a[right -i -1];
        a[right -i -1] = temp;
    }

    return a;
}
public static void main(String[] args) throws IOException {

    String s= "i think this works";
    char[] str = s.toCharArray();       
    int i=0;
    rev(str,i,s.length());
    int j=0;
    while(j < str.length) {
        if (str[j] != ' ' && j != str.length -1) {
            j++;
        } else
        {
            if (j == (str.length -1))   {
                j++;
            }
            rev(str,i,j);
            i=j+1;
            j=i;
        }
    }
    System.out.println(str);
}