loop within java.util.AbstractMap.putAll(..)

Hi,

I did like what you did, its working fine,

HashMap hm = new HashMap();

hm.put("1","a");

hm.put("2","b");

hm.put("3","c");

TreeMap tm= new TreeMap(hm);

System.out.println("Map: " + tm.get("1"));

rgds

Dhinakar

dhinakaran_apeca at 2007-7-15 1:15:15 >

Well, your execution stops within the Map's putAll method*, but, are you sure it's the Map causing the endless loop or maybe your code loops endlessly that calls the putAll again and again. I'd advice to check the calling code rather than the Map's code.

*If you are using Java 1.5.0_8, line 314 is outside the loop in putAll().

stefan.schulza at 2007-7-15 1:15:15 >

> So, when I saw the code below, I suspected that if

> something is wrong in the map, then it may shake the

> iterator and "while (i.hasNext())" may always get

> true ?

Wonder, what that should be. The Iterator implementation of HashMap is fail-fast, i.e, if the map is modified while iterating, an exception is thrown. What is the context in that you call the putAll(). If there is any loop, check this one first.

stefan.schulza at 2007-7-15 1:15:15 >

> The problem that I raise here is that it happens

> randomly, in the case where the hashmap used to

> construct the treemap has been updated through

> several threads.

If you properly synchronized, that won't be a problem. If you didn't, it might.

Or it might be that the map contains itslef or portions of itself.

Or it might be that your compare/compareTo is bogus.

jverda at 2007-7-15 1:15:15 >