From the above statements, you can make out that the order of elements will change depending on the class used for creating an instance of the list.įor Example, for a list with stack class, the order is Last In, First Out (LIFO).

Hence you can declare and create instances of the list in any one of the following ways:Īs shown above, you can create a list with any of the above classes and then initialize these lists with values. We have already stated that List is an interface and is implemented by classes like ArrayList, Stack, Vector and LinkedList.

To include the functionality of the list interface in your program, you will have to import the package java.util.* that contain list interface and other classes definitions as follows: import java.util.* Create & Declare List Hence, when you have to implement list Interface, you can implement any of the above list type class depending on the requirements. Stack, LinkedList, ArrayList, and Vector. Thus there are four types of lists in Java i.e. The classes LinkedList, Stack, Vector, ArrayList, and CopyOnWriteArrayList are all the implementation classes of List interface that are frequently used by programmers. The class AbstractList provides the skeletal implementation of the List interface. Java List Class DiagramĪs shown in the above class diagram, the Java list interface extends from the Collection interface of java.util package which in turn extends from the Iterable interface of the java.util package. Given below is a class diagram of the Java List interface. This is the standard interface that inherits the Collection interface of Java.

The Java List interface is a sub-type of the Java Collection interface.

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