Hinweis Nr. 1 "Zählen und Anzeigen doppelter Werte in einem Array" [Java]

public static void main(String[] args) {

    String [] array = {"y","x","x","y","z","y","x","y","z","z"};
    List<String> list = new ArrayList<>(Arrays.asList(array));
    TreeSet<String> ts = new TreeSet<>(list);

    for(String s : ts) {
        int count = 0;
        for(String ss : list) {
            if(s.equals(ss)) {
                count++;
            }
        }
        System.out.println(s + " " + count);
    }
}

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