This program is suppose to sort the the Strings from long to small. What am I doing wrong ?

/*
    Try this 5-1

    Demonstrate the bubble sort.
*/

class Bubble {

    public static void main(String[] args) {
        String sentences[] =
                {"1There is the so called first sentence. ",
                        "2There is the second sentence",
                        "3There is a third sentence",
                        "4many sentences,",
                        "5Lots of sentences,"};

        int a, b;
        String t; //exchange
        int size = sentences.length;
        System.out.print(size);

        // This is the bubble sort
        for (a = 1; a < size; a++) {
            for (b = size - 1; b > a; b--) {
                if (sentences[b - 1].length() >  sentences[b].length()){ // if out of order
                    // Exchange elements
                    t = sentences[b - 1];
                    sentences[b - 1] = sentences[b];
                    sentences[b] = t;
                    for (String y : sentences){

                        System.out.print(y + "\n");



                    }
                    System.out.println();
                }
            }
        }



       }




    }