dcsimg
Login | Register   
LinkedIn
Google+
Twitter
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.


Tip of the Day
Language: Java
Expertise: Intermediate
Mar 20, 2001

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


Returning Keywords From a Map


A Hashmap is often used to store Keyword-Value pairs. The keywords are strings, so it is convenient to return a list of the keywords as an array of Strings. Fortunately, there is an easy way to do this! In the following code, the getKeywords() method extracts the keywords as a Set, and then converts them to an array of Strings.
 
// The following code will print:
//  key2
//  key1
import java.util.HashMap;
import java.lang.*;
 
public class KeyVal {
  protected HashMap keyValMap;
 
  public KeyVal() {
    keyValMap = new HashMap();
    keyValMap.put(
Robert Patterson
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date