Example usage for java.util ArrayList ArrayList

Introduction

In this page you can find the example usage for java.util ArrayList ArrayList.

Prototype

public ArrayList(Collection<? extends E> c)

Source Link

Document

Constructs a list containing the elements of the specified collection, in the order they are returned by the collection's iterator.

Usage

From source file:Main.java

public static void main(String args[]) {
    // create an array of string objs
    String init[] = { "One", "Two", "Three", "One", "Two", "Three", "from java2s.com" };

    // create one list
    List<String> list = new ArrayList<String>(Arrays.asList(init));

    System.out.println("List value before: " + list);

    // create singleton list
    list = Collections.singletonList("One");

    System.out.println("List value after: " + list);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {

    List stuff = Arrays.asList(new String[] { "a", "b" });

    List list = new ArrayList(stuff);
    list = Collections.unmodifiableList(list);

    try {//w ww  .j  a v  a  2  s  .  c o  m
        list.set(0, "new value");
    } catch (UnsupportedOperationException e) {
        System.out.println(e.getMessage());
    }

}

From source file:Main.java

public static void main(String[] args) {
    List<String> yearList = new ArrayList<>(25);
    yearList.add("042015");
    yearList.add("052015");
    yearList.add("062015");
    yearList.add("072015");
    yearList.add("082015");
    yearList.add("092015");
    yearList.add("102010");
    yearList.add("112010");
    yearList.add("122010");
    yearList.add("012015");
    yearList.add("022015");
    yearList.add("032015");

    Collections.sort(yearList, new Comparator<String>() {
        private DateFormat format = new SimpleDateFormat("MMyyyy");

        @Override//from  ww  w.ja va2  s . c o  m
        public int compare(String o1, String o2) {
            int result = 0;
            try {
                Date d1 = format.parse(o1);
                try {
                    Date d2 = format.parse(o2);
                    result = d1.compareTo(d2);
                } catch (ParseException ex) {
                    result = -1;
                }
            } catch (ParseException ex) {
                result = 1;
            }
            return result;
        }
    });
    System.out.println(yearList);
}

From source file:MainClass.java

public static void main(String args[]) {
    String orig[] = { "1st", "2nd", "3rd", "4th", "5th", "1st", "2nd", "3rd", "4th", "5th" };
    String act[] = { "2nd", "3rd", "6th" };
    List origList = new ArrayList(Arrays.asList(orig));
    List actList = Arrays.asList(act);

    System.out.println(origList.retainAll(actList));
    System.out.println(origList);
}

From source file:Main.java

public static void main(String[] args) {
    Random random = new Random();
    Set<Integer> set = new HashSet<Integer>();
    while (set.size() < 5) {
        set.add(random.nextInt());//from  w ww  .j ava  2 s.  com
    }
    List<Integer> result = new ArrayList<Integer>(set);
    System.out.println(result);
}

From source file:Main.java

public static void main(String[] args) {
    Set<String> allZones = ZoneId.getAvailableZoneIds();
    List<String> zoneList = new ArrayList<String>(allZones);
    Collections.sort(zoneList);/*from   w  ww.j av  a 2  s.co  m*/

    LocalDateTime dt = LocalDateTime.now();
    for (String s : zoneList) {
        ZoneId zone = ZoneId.of(s);
        ZonedDateTime zdt = dt.atZone(zone);
        ZoneOffset offset = zdt.getOffset();
        String out = String.format("%35s %10s%n", zone, offset);
        System.out.println(out);
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {

    List stuff = Arrays.asList(new String[] { "a", "b" });

    List list = new ArrayList(stuff);
    list = Collections.unmodifiableList(list);

    try {/*from   w  ww  .  ja v a 2 s  .  c o m*/
        list.set(0, "new value");
    } catch (UnsupportedOperationException e) {

    }

    Set set = new HashSet(stuff);
    set = Collections.unmodifiableSet(set);

    Map map = new HashMap();
    map = Collections.unmodifiableMap(map);
}

From source file:MainClass.java

public static void main(String args[]) {
    String simpsons[] = { "B", "H", "L", "M", "H", "M", "R" };

    List list = new ArrayList(Arrays.asList(simpsons));

    // Ensure list sorted
    Collections.sort(list);// w ww. ja va  2  s .  com
    System.out.println("Sorted list: [length: " + list.size() + "]");
    System.out.println(list);

    // Search for element in list
    int index = Collections.binarySearch(list, "M");
    System.out.println("Found M @ " + index);

    // Search for element not in list
    index = Collections.binarySearch(list, "J");
    System.out.println("Didn't find J @ " + index);

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    List stuff = Arrays.asList(new String[] { "a", "b" });

    List list = new ArrayList(stuff);
    List list2 = new LinkedList(list);

    Set set = new HashSet(stuff);
    Set set2 = new TreeSet(set);

    Map map = new HashMap();
    Map map2 = new TreeMap(map);
}

From source file:Main.java

public static void main(String args[]) {

    Hashtable<String, String> h = new Hashtable<String, String>();
    h.put("a", "b");
    h.put("c", "d");
    h.put("e", "f");

    for (String str : h.keySet()) {
        System.out.println(str);/*from w ww.ja v  a  2  s  . c  om*/
    }
    List<String> v = new ArrayList<String>(h.keySet());
    Collections.sort(v);

    for (String str : v) {
        System.out.println(str + " " + (String) h.get(str));
    }
}