Hi, I have experienced a strange behavour with ArrayList and HashMap. My ArrayList contains a number of HashMap objects. ArrayList list = new ArrayList(); HashMap map = new HashMap(3); for(int i=0;i <10;i++){ map.put(key1,value1); map.put(key2,value2); map.put(key3,value3); list.add(map); map.clear() } As a result of this code, the List object contains 10 null HashMap objects. If I remove map.clear(), and change the code to following, it works fine: for(int i=0;i <10;i++){ map = new HashMap(3); map.put(key1,value1); map.put(key2,value2); map.put(   More>>

			

			ArrayList list = new ArrayList();
			

			HashMap map = new HashMap(3);
			

			

			for(int i=0;i
			<10;i++){
			

			map.put(key1,value1);
			

			map.put(key2,value2);
			

			map.put(key3,value3);
			

			

			list.add(map);
			

			

			map.clear()
			

			}
			

		

			

			for(int i=0;i
			<10;i++){
			

			map = new HashMap(3);
			

			map.put(key1,value1);
			

			map.put(key2,value2);
			

			map.put(key3,value3);
			

			

			list.add(map);
			

			

			//map.clear();
			

			map = null;
			

			}