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Tutorials in the section

Java: Collections Class  
This page discusses - Java: Collections Class.

Map Iteration  
No direct iteration over Maps -- Get Set of keys or key-value pairs from Mapt.

Java: Maps  
Map implemented by HashMap and TreeMap.

Java: Sets  
Sets are collections that allow only one object with a given value in them..

Old and New Vector Methods  
The Vector class was updated to implement the List interface..

Java Notes: Vectors  
To Create a Vector.

ArrayList (non-generic)  
An ArrayList can be traversed using either iterators or indexes..

ArrayList  
An ArrayList has methods for inserting, deleting, and searching..

Comparators  
The primary use of comparators is to pass them to something that does sorting, either one of the explicit sort methods, or to a data structure than implicitly sorts..

Iterators  
Iterator is a replacement for the Enumeration class which was used before collections were added to Java..

Collections Class  
The java.util.Collections class contains static utility methods for manipulating collections..

Collection Interface  
The Collection interface is the parent of the List and Set interfaces, but not Map..

Set<E> interface  
The java.util.Set<E> interface is a subinterface of Collection<E>..

Programming - WordFrequency modifications  
The purpose of these exercises is to get practice with using some of the basic data structures..

Java: Map Iteration  
No direct iteration over Maps -- Get Set of keys or key-value pairs from Mapt.

Java: Maps  
Key-value pairs are stored in maps..

Example - WordFrequency  
This program reads files of words and lists their frequencies..

Java Notes: Vectors  
Vectors can hold only Objects and not primitive types (eg, int)..

Simple Linked Lists  
A simple singly-linked list. This shows the basics..

Simple Linked List Exercise 1  
Simple Linked List Exercise 1.

ArrayList  
An ArrayList automatically expands as data is added..

ArrayList<E>  
An ArrayList automatically expands as data is added..

Collections Exercise 2a - State Capital Output  
The solution to mapping from a state code (eg, "MI", "NY", ...) to its capital city ("Lansing", "Albany", ...) is to use a HashMap..

Collections Exercise 4 - Word Translator  
The user will enter a word and the program will produce a list of "translations"..

Collections Exercise 4 - Word Translator (Generics)  
For passing over the elements of a data structure, consider only Iterator and for loop..

Collections Exercise 3 - Points  
For passing over the elements of a data structure, consider only Iterator and for loop..

Collections Exercise 2 - State Capitals  
For the purposes of this exercise, the only data structures that need to be considered are: array, ArrayList, LinkedList, HashSet, TreeSet, HashMap, and TreeMap..

Collections Exercise 1 - Unique Components  
For the purposes of this exercise, the only data structures that need to be considered are: array, ArrayList, LinkedList, HashSet, TreeSet, HashMap, and TreeMap..

Collections (Data Structure Library)  
Predefined Libraries.

Java 5 Features  
To resources on new Collections features.

Iterators  
The List and Set collections provide iterators..

Java Notes: Generics  
You generally won't define generic classes and methods yourself, but you do have to understand how and why they are used..

Alternative Data Structures  
These packages address several shortcomings of the Java Collections data structures..

Java Notes: Downcasting  
There are a lot of things to like about Java Collections, but there are some weak aspects too..

Comparators  
The primary use of comparators is to pass them to something that does sorting, either one of the explicit sort methods, or to a data structure than implicitly sorts (eg, TreeSet or TreeMap)..

Class or Interface  
Declare variables as class or interface type?.

Collection Interface  
The Collection interface is the parent of the List and Set interfaces, but not Map..

Collections Overview  
Summary of Collections interfaces.

Java Data Structures  
The overall term for Java's data structure facilities is Collections, a term is is an alternative to the more common Data Structures..

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