// $Id: hash2.java,v 1.3 2001/05/31 20:37:44 doug Exp $ // http://www.bagley.org/~doug/shootout/ import java.util.*; class Val { int val; Val(int init) { val = init; } } public class hash2 { public static void main(String args[]) { int n = Integer.parseInt(args[0]); HashMap hash1 = new HashMap(10000); HashMap hash2 = new HashMap(n); for(int i = 0; i < 10000; i++) hash1.put("foo_" + Integer.toString(i, 10), new Val(i)); for(int i = 0; i < n; i++) { Iterator it = hash1.entrySet().iterator(); while(it.hasNext()) { Map.Entry h1 = (Map.Entry)it.next(); String key = (String)h1.getKey(); int v1 = ((Val)h1.getValue()).val; if (hash2.containsKey(key)) ((Val)hash2.get(key)).val += v1; else hash2.put(key, new Val(v1)); } } System.out.print(((Val)hash1.get("foo_1")).val + " " + ((Val)hash1.get("foo_9999")).val + " " + ((Val)hash2.get("foo_1")).val + " " + ((Val)hash2.get("foo_9999")).val + "\n"); } }