• This class is used to make an fixed sized as well as expandable array. 
• It allows to add any type of object.
• It is the implementation of the List interface

Example of Java Arraylist Declaration

import java.util.ArrayList;
import java.util.List;

public class List1 {
    public static void main(String[] args) {
        List list=new ArrayList();
        String names[]={"mac","john","alexender","rock","alex"};
        for (int i = 0; i < names.length; i++) {
        list.add(names[i]);
        }
        for (int i = 0; i < names.length; i++) {
        System.out.println((i+1)+" : "+list.get(i));
        }
    }
}
Output
1 : mac
2 : john
3 : alexender
4 : rock
5 : alex

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