ArrayList
=========
Methods:
========
1) add():
========
-> can use to add an element to the array list at the end (appending).
Syntax:
	ArrayListObject.add(element);

-> add() can also use to add element at the specified position of an arraylist (Insertion).
Syntax:
	ArrayListObject.add(position, element);
-> if the specified index is immediate to the given size of arraylist:
	insertion is possible.
-> if the specified index is exceeding the size of an arraylist:
	insertion is not possible.

2) size():
=========
==> to get the total number of elements of an arraylist (length of the arraylist), we can use size() method.
Syntax:
	ArrayListObject.size();

3) remove():
===========
==> based on the index/position to remove an element from an arraylist, we can use "remove()".
Syntax:
	ArrayListObject.remove(position);
-> remove() can accept an index which must be from the defined range of index from an arraylist.

4) addAll():
===========
-> can use to add more than one element to the array list object.
Syntax:
	ArrayListObject.addAll(Another-Object);

package io.arraylist;

import java.util.ArrayList;

public class ArrayListMainClass {

	public static void main(String[] args) {
		ArrayList<String> cars = new ArrayList<>();
		
		// adding elements into car object
		cars.add("Volvo");
		cars.add("BMW");
		cars.add("Ford");
		
		ArrayList<String> brands = new ArrayList<>();
		
		brands.add("Amazon");
		brands.add("Samsung");
		brands.add("Facebook");
		
		System.out.println("Cars = "+cars);
		System.out.println("Brands = "+brands);
		
		brands.addAll(cars);
		
		System.out.println("Brands = "+brands);
	}
}
===========================================================
5) clear():
==========
-> can use to remove all elements from on ArrayList Object.
Syntax:
	ArrayListObject.clear();

package io.arraylist;

import java.util.ArrayList;

public class ArrayListMainClass {

	public static void main(String[] args) {
		ArrayList<String> cars = new ArrayList<>();
		
		// adding elements into car object
		cars.add("Volvo");
		cars.add("BMW");
		cars.add("Ford");
		
		System.out.println("Cars = "+cars);
		
//		cars.remove(0);
		cars.clear();
		
		System.out.println(cars);
	}
}
==============================================================
6) contains():
==============
-> to check the membership of the specified element in the given arraylist, we can use:
	contains() method.
Syntax:
	ArrayListObject.contains(element);

returns:
	true ==> if the specified element is in the given arraylist object.
	false ==> otherwise.

package io.arraylist;

import java.util.ArrayList;

public class ArrayListMainClass {

	public static void main(String[] args) {
		ArrayList<String> cars = new ArrayList<>();
		
		// adding elements into car object
		cars.add("Volvo");
		cars.add("BMW");
		cars.add("Ford");
		
		System.out.println("Cars = "+cars);
		
		System.out.println(cars.contains("Apple"));
		System.out.println(cars.contains("BMW"));
	}
}
==============================================================
isEmpty():
=========
-> to check whether the arraylist object is empty or not, we can use "isEmpty()" method.
return:
	true ==> if it is empty
	false ==> otherwise

package io.arraylist;

import java.util.ArrayList;

public class ArrayListMainClass {

	public static void main(String[] args) {
		ArrayList<String> cars = new ArrayList<>();
		
		// adding elements into car object
		cars.add("Volvo");
		cars.add("BMW");
		cars.add("Ford");
		
		System.out.println("Cars = "+cars);
		
		System.out.println(cars.isEmpty());
	}
}
=============================================
iterator():
==========
-> iterator() can use to create an iterator object.
-> the iterator object can use to traverse on arraylist object element by element.
-> at the time of object creation, the iterator object can point to before the 0th element of an arraylist by default.
-> Syntax for the iterator object creation:
	Iterator<Type> iterator-object-name = arraylist-object.iterator();
-> to check whether the next position is with element or not, we can use "hasNext()"
hasNext() return:
	true ==> next position with an element
	false ==> next position without an element 
-> if the next position is with an element, we need to change the position of the iterator object, we can use "next()".

package io.arraylist;

import java.util.ArrayList;
import java.util.Iterator;

public class ArrayListObjects {

	public static void main(String[] args) {
		// Creating of integer array list
		
		ArrayList<Integer> lst = new ArrayList<>();
		
		lst.add(100);
		lst.add(200);
		lst.add(300);
		lst.add(400);
		lst.add(500);
		
		System.out.println("The Given Array List Object = "+lst);
		
		Iterator<Integer> it = lst.iterator();
		
		while(it.hasNext()) {
			Integer i = it.next();
			System.out.println(i);
		}
	}

}

======================================================
for each loop:
=============

package io.arraylist;

import java.util.ArrayList;
import java.util.Iterator;

public class ArrayListObjects {

	public static void main(String[] args) {
		// Creating of integer array list
		
		ArrayList<Integer> lst = new ArrayList<>();
		
		lst.add(100);
		lst.add(200);
		lst.add(300);
		lst.add(400);
		lst.add(500);
		
		System.out.println("The Given Array List Object = ");
		
		for(Integer i:lst) {
			System.out.println(i);
		}
		
		
	}

}