Category: Category: Java SE 6

Description: HashSet class is a concrete implementation of Set interface. It creates a collection that uses a hash table […]

The associated package for HashMap and TreeMap classes: java.util.HashMap java.util.TreeMap Common constructors of the HashMap and TreeMap classes: Constructors […]

Description: A LinkedList is a collection that's similar to an array list. However, the LinkedList class doesn't use an […]

Description: An ArrayList is a collection that's imilar to an array, but can change its capacity as elements are […]

The syntax for specifying the type of elements in a collection: CollectionClass<Type> collectionName = new CollectionClass<Type>(); Example 1: A […]

The collection framework: Collection Set HashSet more info here List ArrayList more info here LinkedList more info here Map […]

How arrays and collections are similar. Both can store multile occurrences of objects. Some collection types (such as ArrayList) […]

You can only use the sort method of the Arrays class to sort arrays of objects when the classes […]

There are two ways to define an array: type[] arrayName; type arrayName[]; How to initialize: arrayName = new type[length]; […]

An enumeration is a set of related constants that define a type. The constants are defined with the int […]