ArrayList class Example 1

ArrayList Class Example 2

Import java.util.ArrayList;

public class ArrayListDemo2 {

Into

public static void Main (string[] args) {

arraylist<integer> A1 = new arraylist<integer> (); To create an empty ArrayList object

for (int i=0; i<10;i++) {

Integer a2 = new Integer (i);//Create a wrapper object of an integral type

A1.add (A2); Put this object into the ArrayList

}

Take out

System.out.println ("Elements in the array");

for (int i=0;i<a1.size (); i++) {

Integer a3 = (integer) (A1.get (i));//Get the element indexed as I in ArrayList

SYSTEM.OUT.PRINTLN (A3);

}

System.out.println ("------------");

A1.clear (); Empty

System.out.println ("The case after the array is emptied");

System.out.println ("The length of the array is" +a1.size ());

if (A1.isempty ()) {//Determine if empty

SYSTEM.OUT.PRINTLN ("Array is now empty");

}else{

SYSTEM.OUT.PRINTLN ("Array is now not empty");

}

}

}

This article is from the "Basic Java Primer Notes" blog, declined reprint!

ArrayList class Example 1