ConcurrentHashMap在惠普Unix上的问题

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Vector;
import java.util.concurrent.ConcurrentHashMap;

public class Main {

	static ConcurrentHashMap table = new ConcurrentHashMap();
	
	public static void main(String[] args) throws InterruptedException {
		
		table.put("1", "1");
		System.out.println("loading success");
		
		new Thread() {
			@Override
			public void run() {
				try {
					sleep(500);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
				table.remove("1");
			}
		}.start();
		
		
		for(Iterator it=table.entrySet().iterator();it.hasNext();) {
			Thread.sleep(2000);	
			System.out.println("hahahah");
			Map.Entry entry=(Map.Entry)it.next();
			System.out.println(entry.getKey());
			System.out.println(entry.getValue());
			table.remove(entry.getKey());
		}
		
		System.out.println("main thread compleat");
		
	}
	
}

以上这段代码在惠普UNIX上面的结果比较特殊，是：
BimsInt2[/]#java Main
loading success
hahahah
1
null
main thread compleat

但是在windows、solaris和linux上面的结果是：
loading success
hahahah
1
1
main thread compleat


另：java里面的new java.util.Date()在惠普UNIX上面也比较特殊，具体不细说了。