Demonstrate the HashMap class, and an Iterator
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
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*/
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
/**
* Demonstrate the HashMap class, and an Iterator.
*
* @see HashTableDemo, for the older Hashtable.
*/
public class MapEntrySetDemo {
public static void main(String[] argv) {
// Construct and load the hash. This simulates loading a
// database or reading from a file, or wherever the data is.
Map map = new HashMap();
// The hash maps from company name to address.
// In real life this might map to an Address object...
map.put("Adobe", "Mountain View, CA");
map.put("IBM", "White Plains, NY");
map.put("Learning Tree", "Los Angeles, CA");
map.put("Microsoft", "Redmond, WA");
map.put("Netscape", "Mountain View, CA");
map.put("O'Reilly", "Sebastopol, CA");
map.put("Sun", "Mountain View, CA");
// List the entries using entrySet()
Set entries = map.entrySet();
Iterator it = entries.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
System.out.println(entry.getKey() + "-->" + entry.getValue());
}
}
}
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