collaction

public class Tester {

    public static void main(String[] args) {

        ArrayList<String> arrList = new ArrayList();

        arrList.add("java");
        arrList.add("android");
        arrList.add("ab");
        arrList.add("ab");
        arrList.add("ac");



        System.out.println(arrList);

        ArrayList<Person> personList = new ArrayList();

        personList.add(new Person(3, "SHALTY"));
        personList.add(new Person(2, "AVI"));
        personList.add(new Person(2, "AVI"));
        personList.add(new Person(1, "AVI"));

        System.out.println(personList);

        System.out.println(personList.get(0));
        Collections.sort(arrList);


        Collections.sort(personList);
        System.out.println("==========================");
        System.out.println(arrList);
        System.out.println("==========================");
        Collections.sort(arrList,Collections.reverseOrder());
        System.out.println("==========================");
        System.out.println(arrList);
        System.out.println("==========================");


        System.out.println(personList);
    }

}