ArrayList

package collectionImpl;

import java.util.ArrayList;
import java.util.Arrays;

public class MyArrayList 
{
	private Object[] MyArray;
	private int actSize=0;
	
    public MyArrayList(){
        MyArray = new Object[10];
    }
    public Object get(int index)
    {
    	if(index<actSize)
    		return MyArray[index];
    	else
    		throw new ArrayIndexOutOfBoundsException();
    }
    public void add(Object ob)
    {
    	if(MyArray.length-actSize<=5)
    	{
    		increaseListSize();
    	}
    	MyArray[actSize++]=ob;
    }
    public Object remove(int index)
    {
    	if(index<actSize)
    	{
            Object ob=MyArray[index];
            MyArray[index]=null;
            int temp=index;
            while(index<actSize)
            {
            	MyArray[temp]=MyArray[temp+1];
            	MyArray[temp+1]=null;
            	temp++;
            }
            actSize--;
            return ob;
    	}
    	else
    		throw new ArrayIndexOutOfBoundsException();
    }
    private void increaseListSize() 
    {
		MyArray=Arrays.copyOf(MyArray,MyArray.length * 2);
		System.out.println("New ArrayList lenghth:"+MyArray.length);
	}
    public int Size()
    {
    	return actSize;
    }
    
	public static void main(String[] args) 
	{
        ArrayList<Integer> mal=new ArrayList<Integer>();
        mal.add(4);
        mal.add(6);
        mal.add(8);
        mal.add(10);
        mal.add(12);
        mal.add(14);
        for(int i=0;i<mal.size();i++)
        {
        	System.out.println(mal.get(i)+" ");
        }
        
        mal.add(16);
        
        System.out.println("Element at index 4:"+mal.get(4));
        System.out.println("List size:"+mal.size());
        System.out.println("Removing element at index 3: "+mal.remove(3));
        
        System.out.println("DIsplaying the final List:");
        for(int i=0;i<mal.size();i++)
        {
        	System.out.println(mal.get(i)+" ");
        }
	}

}