Java tutorial
import java.util.Enumeration; import java.util.Hashtable; class HTDemo { public static void main(String args[]) { Hashtable<String, Double> balance = new Hashtable<String, Double>(); Enumeration<String> names; String str; double bal; balance.put("A", 3434.34); balance.put("B", 123.22); balance.put("C", 1378.00); balance.put("D", 99.22); balance.put("E", -19.08); names = balance.keys(); while (names.hasMoreElements()) { str = names.nextElement(); System.out.println(str + ": " + balance.get(str)); } bal = balance.get("A"); balance.put("A", bal + 1000); System.out.println("A's new balance: " + balance.get("A")); } }