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) {
    ArrayList<Integer> arrlist = new ArrayList<Integer>(5);

    // use add() method to add elements in the list
    arrlist.add(20);/*from  www.  j av  a 2 s  . c  om*/
    arrlist.add(30);
    arrlist.add(10);
    arrlist.add(50);

    System.out.println(arrlist);

    // finding size of this list
    int retval = arrlist.size();
    System.out.println("List consists of " + retval + " elements");

    arrlist.clear();
    retval = arrlist.size();
    System.out.println("list consists of " + retval + " elements");
}

From source file:Main.java

public static void main(String[] args) {

    ArrayList<String> arrlist = new ArrayList<String>(5);

    arrlist.add("G");
    arrlist.add("E");
    arrlist.add("F");
    arrlist.add("M");
    arrlist.add("E");
    arrlist.add("from java2s.com");

    System.out.println("Size of list: " + arrlist.size());

    System.out.println(arrlist);/*from  ww w  .  ja va  2s. com*/

    // Retrieving the index of last occurrence of element "E"
    int retval = arrlist.lastIndexOf("E");
    System.out.println("The last occurrence of E is at index " + retval);

}

From source file:Main.java

public static void main(String[] args) {

    ArrayList<String> arrlist = new ArrayList<String>(5);

    arrlist.add("G");
    arrlist.add("E");
    arrlist.add("F");
    arrlist.add("M");
    arrlist.add("E");
    arrlist.add("from java2s.com");

    System.out.println("Size of list: " + arrlist.size());

    System.out.println(arrlist);/*from www  .j a  v  a2 s  .co  m*/

    // Removes first occurrence of "E"
    boolean value = arrlist.remove("E");

    System.out.println("Now, Size of list: " + arrlist.size());

    System.out.println("Value = " + arrlist);
}

From source file:Main.java

public static void main(String args[]) {

    ArrayList<String> arrList = new ArrayList<>(Arrays.asList("a", "a", "a", "from java2s.com"));

    // Trim the arraylist
    arrList.trimToSize();/*from ww w.j a va  2  s. c om*/

    System.out.println(arrList);
}

From source file:Main.java

public static void main(String args[]) {
    ArrayList<Integer> arrlist = new ArrayList<Integer>(5);

    arrlist.add(1);/*from   ww w .  j a  va2s.c o m*/
    arrlist.add(2);
    arrlist.add(4);

    System.out.println(arrlist);

    ArrayList<Integer> arrlist2 = new ArrayList<Integer>(5);
    arrlist2.add(2);
    arrlist2.add(3);
    arrlist2.add(3);
    arrlist2.add(3);

    System.out.println(arrlist2);

    // inserting all elements
    arrlist.addAll(arrlist2);

    System.out.println(arrlist);

}

From source file:Main.java

public static void main(String args[]) {
    ArrayList<Integer> arrlist = new ArrayList<Integer>(5);

    arrlist.add(1);//from   w ww. j a  v a2  s. com
    arrlist.add(2);
    arrlist.add(4);

    System.out.println(arrlist);

    ArrayList<Integer> arrlist2 = new ArrayList<Integer>(5);

    arrlist2.add(25);
    arrlist2.add(30);
    arrlist2.add(31);
    arrlist2.add(35);

    System.out.println(arrlist2);

    // inserting all elements of list2 at third position
    arrlist.addAll(2, arrlist2);

    System.out.println(arrlist);

}

From source file:Main.java

public static void main(String args[]) {
    ArrayList<Integer> arrlist = new ArrayList<Integer>(5);

    arrlist.add(1);/*from  ww w  . j  a  v  a  2 s.c  o  m*/
    arrlist.add(2);
    arrlist.add(3);
    arrlist.add(4);
    arrlist.add(5);

    System.out.println(arrlist);

    List<Integer> arrlist2 = arrlist.subList(2, 4);

    System.out.println(arrlist2);

}

From source file:MainClass.java

public static void main(String[] a) {
    List list = new ArrayList(10);
    Object anObject = "A";
    list.add("N");
    Collections.fill(list, anObject);
    System.out.println(list);/*from  w  w  w  .ja  v  a 2  s  .  c om*/
    System.out.println(list.size());
}

From source file:Main.java

public static void main(String[] args) {

    ArrayList<Integer> arrlist = new ArrayList<Integer>(5);

    arrlist.add(20);/*w  w  w  . ja v  a  2 s  .  c  om*/
    arrlist.add(40);
    arrlist.add(10);
    arrlist.add(15);
    arrlist.add(25);

    Object[] ob = arrlist.toArray();

    System.out.println(Arrays.toString(ob));

}

From source file:Main.java

public static void main(String[] args) {
    List<String> data = new ArrayList<String>(Arrays.asList(new String[] { "a", "b", "c", "d", "f", "g" }));
    System.out.println(data);//from   w w w .  j a  va2s  .  c o  m
    removeWithoutUsingRemoveMethod(data, 2);
    System.out.println(data);
}