Java – Write hashmap to a csv file

I have a hashmap with a String key and String value. It contains a large number of keys and their respective values. For example: key | value abc | aabbcc def | ddeeff I would like to write this …

HashMap value auto increment

when I was coding, one question occurred to me, which is if the value part(Integer) in the HashMap is able to auto-increment in the following scenario? Map dictionary = new …

Does HashMap.clear() resize inner hash table to the original size?

What happens to the HashMap after this code execution? HashMap m = new HashMap(); for (int i = 0; i < 1024 * 1024; i++) m.put(i, i); m.clear(); After 1M puts the inner hash table will grow …