Sorting an ArrayList of String arrays using compareTo() method

I am new to java.

I'm trying to sort an ArrayList of String arrays using String.compareTo().

I have compiled the code so that the output is:

Causality,is,a,relationship

It,is,also,called,causation

It,is,about,a,cause,and,its,affect

Now I want to sort that code (lexicographically) so the output is:

Causality,a,is,relationship

It,also,called,causation,is

It,a,about,affect,and,cause,is,its

However I am generating some crazy output.

My code is below.

Any help would be appreciated.

I have worked on this probably very simple problem for hours and I am ready to destroy my computer. Thanks

public class Wk5Q5 {

    void process1 () {

        String s1 = "Causality is a relationship";
        String s2 = "It is also called causation";
        String s3 = "It is about a cause and its affect";


        ArrayList<String[]> list = new ArrayList<String[]>();


        String[] arr1 = s1.split(" ");
        list.add(arr1);
        String[] arr2 = s2.split(" ");
        list.add(arr2);
        String[] arr3 = s3.split(" ");
        list.add(arr3);

        /**
         * previously sorted the arraylist of string arrays so that
         * each word is separated by commas
         */
        for(int i = 0; i < list.size(); i++){
            for (int j = 0; j < list.get(i).length; j++){
                String t = list.get(i)[j];

                if (j > 0){
                    t = ", " + t;   
                }
                System.out.print(t);
                //System.out.println(list.get(i)[j]);

            }
            System.out.println();
        }

        /**
         * my attempt at sorting each string in each list 
         */
        for(int z = 0; z < list.size(); z++){
            for(int i = 0; i < list.get(z).length; i++){
                String x = list.get(z)[i];
                for (int j = i+1; j < list.get(z).length; j++){
                    String y = list.get(z)[j];
                    if(y.compareTo(x) < 0) {
                        String temp = list.get(z)[i];
                        x = list.get(z)[j];
                        y = temp;
                    }
                    System.out.print(x);
                }

            }
        }
    }