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   ► KBProgrammingJavaStandard JavaLanguage Det...   Print This     
  From the March 2009 Issue of Prestwood eMag
 
Java Language Details:
Java Associative Array (HashMap())
 
Posted 12 years ago on 11/4/2008 and updated 1/20/2009
Java Code Snippet:
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KB101515

General Info: Associative Array

A set of unique keys linked to a set of values. Each unique key is associated with a value. Think of it as a two column table. MyArray['CA'] = 'California' MyArray['AR'] = 'Arizona'

Languages Focus: Associative Array

Associative arrays are also known as a dictionary or a hash table in other languages.

Java Associative Array

An associative array links a set of keys to a set of values. In Java, associative arrays are implemented as Maps.

This will print "Arizona."

Syntax Example:
import java.util.*;

public class Maps
{
    public static void main(String[] args)
    {
        Map states = new HashMap();
       
        states.put("CA", "California");
        states.put("FL", "Florida");
        states.put("AZ", "Arizona");

        System.out.println(states.get("AZ"));
    }
}


About Associative Array
A set of unique keys linked to a set of values. Each unique key is associated with a value. Think of it as a two column table. MyArray['CA'] = 'California' MyArray['AR'] = 'Arizona'

More Info

Definition:  Associative Array
Code:  Associative Arrays in Java (a Map)

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