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()

Source Link

Document

Constructs an empty list with an initial capacity of ten.

Usage

From source file:Main.java

public static void main(String[] args) {
    List<String> list = new ArrayList<String>();
    list.add("A");
    list.add("B");
    list.add("C");
    list.add("D");

    Object[] array = list.toArray();
    for (int i = 0; i < array.length; i++) {
        System.out.println(array[i].toString());
    }/*w w w .j av a 2s  .  co m*/
}

From source file:Main.java

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

    System.out.println("Initial size of al: " + al.size());

    al.add("C");/*w  w w. j a  v  a2s.  c  om*/
    al.add("A");
    al.add("E");
    al.add("B");
    al.add("D");
    al.add("F");
    al.add(1, "java2s.com");

    System.out.println("Size of al after additions: " + al.size());

    System.out.println("Contents of al: " + al);

    al.remove("F");
    al.remove(2);

    System.out.println("Size of al after deletions: " + al.size());
    System.out.println("Contents of al: " + al);
}

From source file:MainClass.java

public static void main(String[] a) {

    List list = new ArrayList();
    list.add("A");

    List list2 = ((List) ((ArrayList) list).clone());

    System.out.println(list);/*from  w w  w .j  av  a 2  s  . co  m*/
    System.out.println(list2);

    list.clear();

    System.out.println(list);
    System.out.println(list2);
}

From source file:ArrayListToArray.java

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

    al.add(1);/*ww  w  .ja  v  a  2 s.  c o m*/
    al.add(2);
    al.add(3);
    al.add(4);

    System.out.println("Contents of al: " + al);

    Integer ia[] = new Integer[al.size()];
    ia = al.toArray(ia);

    int sum = 0;

    for (int i : ia)
        sum += i;

    System.out.println("Sum is: " + sum);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    List list = new ArrayList();

    Object[] objectArray = list.toArray();
    MyClass[] array = (MyClass[]) list.toArray(new MyClass[list.size()]);

}

From source file:Main.java

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

    int total = ids.size(); // total will be zero

    System.out.println("ArrayList size is  " + total);
    System.out.println("ArrayList elements are   " + ids);

    ids.add(new Integer(10)); // Adding an Integer object.
    ids.add(20); // Autoboxing
    ids.add(30); // Autoboxing

    total = ids.size(); // total will be 3

    System.out.println("ArrayList size is  " + total);
    System.out.println("ArrayList elements are   " + ids);

    ids.clear();//from  w w  w  .j  a v a  2 s .c  o m

    total = ids.size(); // total will be 0
    System.out.println("ArrayList size is  " + total);
    System.out.println("ArrayList elements are   " + ids);
}

From source file:Main.java

public static void main(String[] a) {

    List<String> list = new ArrayList<String>();
    list.add("A");

    List list2 = ((List) ((ArrayList) list).clone());

    System.out.println(list);/*  ww  w.j  a va2 s.c  om*/
    System.out.println(list2);

    list.clear();

    System.out.println(list);
    System.out.println(list2);
}

From source file:OldStyle.java

public static void main(String args[]) {
    ArrayList list = new ArrayList();

    list.add("one");
    list.add("two");
    list.add("three");
    list.add("four");

    Iterator itr = list.iterator();
    while (itr.hasNext()) {
        String str = (String) itr.next(); // explicit cast needed here.

        System.out.println(str + " is " + str.length() + " chars long.");
    }//from  w w  w.  j  a  v  a  2 s  .c  o  m
}

From source file:Main.java

public static void main(String[] args) {
    List<String> list = new ArrayList<String>();
    list.add("notepad.exe");

    ProcessBuilder pb = new ProcessBuilder(list);

    List<String> list2 = new ArrayList<String>();
    list2.add("text.txt");

    // set the command list
    pb.command(list2);//from   ww w  .  j  av a 2  s.  c o m

    System.out.println(pb.command());
}

From source file:MainClass.java

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

    List list = new ArrayList();
    list.add("A");
    list.add("B");
    list.add("C");

    System.out.println(list.get(2));

}