Example usage for java.util ArrayList size

Introduction

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

Prototype

int size

To view the source code for java.util ArrayList size.

Click Source Link

Document

The size of the ArrayList (the number of elements it contains).

Usage

From source file:Main.java

public static void main(String[] args) {

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

    arrayList.add("1");
    arrayList.add("2");
    arrayList.add("3");

    System.out.println(arrayList.size());

    arrayList.clear();/*from   www  .  j a v  a  2s  .  c  om*/

    System.out.println(arrayList.size());

}

From source file:Main.java

public static void main(String[] args) {

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

    arrlist.add(15);//w w  w .ja va2s.  com
    arrlist.add(2);
    arrlist.add(2);
    arrlist.add(2);

    int retval = arrlist.size();
    System.out.println("Size of list = " + retval);
}

From source file:SearchTest.java

public static void main(String args[]) {
    String simpsons[] = { "Bart", "Hugo", "Lisa", "Marge", "Homer", "Maggie", "Roy" };

    // Convert to list
    ArrayList list = new ArrayList(Arrays.asList(simpsons));

    // Ensure list sorted
    Collections.sort(list);//from w  ww. ja  v a 2  s.  co  m
    System.out.println("Sorted list: [length: " + list.size() + "]");
    System.out.println(list);

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

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

    // Insert
    int newIndex = -index - 1;
    list.add(newIndex, "Jimbo Jones");
    System.out.println("With Jimbo Jones added: [length: " + list.size() + "]");
    System.out.println(list);
}

From source file:MainClass.java

public static void main(String[] args) {
    ArrayList myList = new ArrayList(5);
    for (int i = 0; i < 5; i++) {
        myList.add(new Integer(i));
    }/* w  ww  .  ja v a  2s.  com*/
    System.out.println("List contains " + myList.size() + " elements");

    Integer int2 = new Integer(2);
    System.out.println("List contains Integer(2): " + myList.contains(int2));
    System.out.println("Integer(2) is at index " + myList.indexOf(int2));

    myList.set(2, new Integer(99));
    System.out.println("Get element at index 2: " + myList.get(2));

    myList.ensureCapacity(15);
    for (int i = 10; i < 15; i++) {
        myList.add(new Integer(i));
    }

    myList.subList(10, 15).clear();
    myList.trimToSize();

    System.out.println(myList);
}

From source file:Main.java

public static void main(String[] args) {

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

    arrlist.add(20);//from   ww  w  .  j  ava2  s  .co m
    arrlist.add(15);
    arrlist.add(30);
    arrlist.add(45);

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

    arrlist.remove(2);

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

}

From source file:fitmon.DietAPI.java

public static void main(String[] args) throws InvalidKeyException, NoSuchAlgorithmException,
        ParserConfigurationException, SAXException, IOException {
    DietAPI obj = new DietAPI();
    ArrayList<Food> foodList = new ArrayList<Food>();
    ArrayList<ArrayList<Food>> listOfFoodList = obj.searchFood("apple");
    for (int i = 0; i < listOfFoodList.size(); i++) {
        for (int j = 0; j < listOfFoodList.get(i).size(); j++) {
            foodList.add(listOfFoodList.get(i).get(j));
        }//from  www .j a  va 2  s .  c om
    }

}

From source file:Main.java

public static void main(String[] args) {
    ArrayList<String> al = new ArrayList<String>();
    al.add("Java");
    al.add("SQL");
    al.add("Data");

    System.out.println("ArrayList:" + al);
    String[] s1 = new String[al.size()];

    String[] s2 = al.toArray(s1);

    System.out.println("s1 == s2:" + (s1 == s2));
    System.out.println("s1:" + Arrays.toString(s1));
    System.out.println("s2:" + Arrays.toString(s2));

    s1 = new String[1];
    s1[0] = "hello"; // Store hello in first element

    s2 = al.toArray(s1);/*  ww w  . j  a  v a 2s  .  c o  m*/

    System.out.println("s1 == s2:" + (s1 == s2));
    System.out.println("s1:" + Arrays.toString(s1));
    System.out.println("s2:" + Arrays.toString(s2));
}

From source file:ArrayListToArray.java

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

    al.add(1);/*w  w w  .  ja v a2  s.  co 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:MainClass.java

public static void main(String args[]) {

    ArrayList<Integer> al = new ArrayList<Integer>();

    al.add(1);/*from   w w  w . j  a  v a2 s  .co 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:MainClass.java

public static void main(String[] args) {
    // Build a vector of words to be sorted
    ArrayList list = new ArrayList();
    list.add("m");
    list.add("c2");
    list.add("e");
    list.add("c1");

    Collator collate = Collator.getInstance();

    CollationKey[] keys = new CollationKey[list.size()];

    for (int k = 0; k < list.size(); k++)
        keys[k] = collate.getCollationKey((String) list.get(k));

    Arrays.sort(keys);//from  w  ww.  j a  v  a 2  s.com

    for (int l = 0; l < keys.length; l++) {
        System.out.println(keys[l].getSourceString());
    }
}