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Tip of the Day
Language: Java
Expertise: Intermediate
Mar 19, 2001



Application Security Testing: An Integral Part of DevOps

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();
Robert Patterson
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