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// key1import java.util.HashMap;import java.lang.*; public class KeyVal { protected HashMap keyValMap; public KeyVal() { keyValMap = new HashMap(); keyValMap.put(
