|
/*
{three=four, two=three, four=five, one=two}
4
three : four
two : three
four : five
one : two
three : four
two : three
four : five
one : two
*/
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class MainClass {
public static void main(String args[]) throws Exception {
Hashtable hash = new Hashtable(89);
hash.put("one", "two");
hash.put("two", "three");
hash.put("three", "four");
hash.put("four", "five");
System.out.println(hash);
System.out.println(hash.size());
Enumeration e = hash.keys();
while (e.hasMoreElements()) {
String key = (String) e.nextElement();
System.out.println(key + " : " + hash.get(key));
}
Set set = hash.entrySet();
Iterator it = set.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
System.out.println(entry.getKey() + " : " + entry.getValue());
}
}
}
|
