ramadani

public class CaseStudy {
    public void case1() {
        ArrayList<String> users = new ArrayList<String>(Arrays.asList("Asep Dadang Supriadi", "Akmal Fuady",
                "Yandi Fitriyanto"));
        ArrayList<String> usersNew = new ArrayList<String>(Arrays.asList("Ricky Andika Putra", "Ramadani"));

        users.addAll(usersNew);
    }
}

ramadani

public class CaseStudy {
    public void case2() {
        ArrayList<String> users = new ArrayList<String>(Arrays.asList("Asep Dadang Supriadi", "Akmal Fuady",
                "Yandi Fitriyanto"));
        ArrayList<String> usersNew = new ArrayList<String>(Arrays.asList("Ricky Andika Putra", "Ramadani"));

        usersNew.addAll(users);
    }
}

ramadani

public void case3() {
    ArrayList<String> users = new ArrayList<String>(Arrays.asList("Ricky Andika Putra", "Ramadani",
            "Asep Dadang Supriadi", "Akmal Fuady", "Yandi Fitriyanto"));

    users.remove(users.size() - 1);
}

ramadani

public void case4() {
    ArrayList<String> users = new ArrayList<String>(Arrays.asList("Ricky Andika Putra", "Ramadani",
            "Asep Dadang Supriadi", "Akmal Fuady", "Yandi Fitriyanto"));

    users.remove(0);
}

ramadani

public void case5() {
    ArrayList<String> inputOne = new ArrayList<String>(Arrays.asList("Ricky Andika Putra", "'Ramadani'",
            "Asep Dadang Supriadi", "Akmal Fuady", "Yandi Fitriyanto"));

    ArrayList<String> inputTwo = new ArrayList<String>(Arrays.asList("Ricky Andika Putra", "Yandi Fitriyanto",
            "Muhammad Sholeh", "Yadi Cahyadi"));

    ArrayList<String> results = new ArrayList<String>(inputOne);

    for (String name: inputTwo) {

ramadani

public void case6() {
    ArrayList<String> inputOne = new ArrayList<String>(Arrays.asList("Ricky Andika Putra", "'Ramadani'",
            "Asep Dadang Supriadi", "Akmal Fuady", "Yandi Fitriyanto"));

    ArrayList<String> inputTwo = new ArrayList<String>(Arrays.asList("Ricky Andika Putra", "Yandi Fitriyanto",
            "Muhammad Sholeh", "Yadi Cahyadi"));

    ArrayList<String> results = new ArrayList<String>();

    for (String name: inputOne) {

ramadani

public void case7() {
    ArrayList<String> inputOne = new ArrayList<String>(Arrays.asList("Ricky Andika Putra", "'Ramadani'",
            "Asep Dadang Supriadi", "Akmal Fuady", "Yandi Fitriyanto"));

    ArrayList<String> inputTwo = new ArrayList<String>(Arrays.asList("Ricky Andika Putra", "Yandi Fitriyanto",
            "Muhammad Sholeh", "Yadi Cahyadi"));

    ArrayList<String> results = new ArrayList<String>();

    for (String name: inputOne) {

ramadani

public void case8() {
    Map<String, String> users = new LinkedHashMap<String, String>();
    users.put("user1@example.com", "Adimas Lutfi Wicaksono");
    users.put("user2@example.com", "Salman Alfarisi");
    users.put("user3@example.com", "Muhammad Sholeh");
    users.put("user4@example.com", "Yadi Cahyadi");
    users.put("user5@example.com", "Maya Maulani");

    users.keySet();
}

ramadani

public void case9() {
    Map<String, String> users = new LinkedHashMap<String, String>();
    users.put("user1@example.com", "Adimas Lutfi Wicaksono");
    users.put("user2@example.com", "Salman Alfarisi");
    users.put("user3@example.com", "Muhammad Sholeh");
    users.put("user4@example.com", "Yadi Cahyadi");
    users.put("user5@example.com", "Maya Maulani");

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

ramadani

public void case10() {
    ArrayList<String> names = new ArrayList<String>(Arrays.asList("Adimas Lutfi Wicaksono", "Salman Alfarisi",
            "Adimas Lutfi Wicaksono", "Muhammad Sholeh", "Yadi Cahyadi", "Maya Maulani", "Maya Maulani"));

    HashSet<String> uniqueNames = new LinkedHashSet<String>(names);

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