A value retrieved from a type-specific collection does not need to be casted : Map « Collections Data Structure « Java

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Java » Collections Data Structure » Map

A value retrieved from a type-specific collection does not need to be casted


   

import java.net.MalformedURLException;

import java.net.URL;

import java.util.HashMap;

import java.util.Map;



public class Main {

  public static void main(String[] argv) {



    Map<String, URL> urlMap = new HashMap<String, URL>();

    try {

      urlMap.put("java", new URL("http://www.java2java.com"));

    } catch (MalformedURLException e) {

    }

    String s = urlMap.get("java").getHost();

  }

}

Related examples in the same category

1.	Creating and storing arrays in a map
2.	Sort based on the values
3.	Get a key from value with an HashMap
4.	Retrieve environment variables (JDK1.5)
5.	Creating a Type-Specific Map: creates a map whose keys are Integer objects and values are String objects.
6.	A map declared to hold objects of a type T can also hold objects that extend from T
7.	Map techniques.
8.	Create an array containing the keys in a map
9.	Create an array containing the values in a map
10.	Creating a Hash Table
11.	Creating a Map That Retains Order-of-Insertion
12.	Automatically Removing an Unreferenced Element from a Hash Table
13.	Creating a Type-Specific Map [5.0]
14.	Use Iterator to loop through the HashMap class
15.	Create type specific collections
16.	Convert Properties into Map
17.	A java.util.Map implementation using reference values
18.	Utility method that return a String representation of a map. The elements will be represented as "key = value"
19.	Utility method that return a String representation of a map. The elements will be represented as "key = value" (tab)

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