Java ArrayList allows duplicate and null values. Java ArrayList is an ordered collection. It maintains the insertion order of the elements. You cannot create an ArrayList of primitive types like int, char etc. You need to use boxed types like Integer, Cha

The ArrayList class extends AbstractList and implements the List interface. ArrayList supports dynamic arrays that can grow as needed. Standard Java arrays are of a fixed length. After arrays are created, they cannot grow or shrink, which means that you m

Java ArrayList. The ArrayList class is a resizable array, which can be found in the java.util package.. The difference between a built-in array and an ArrayList in Java, is that the size of an array cannot be modified (if you want to add or remove element