1) Implementation: HashMap implements Map interface and HashSet implements Set interface. 2) Duplicates: HashSet does’t allow duplicate values. HashMap store key, value pairs and it does not allow ...

You can use this collection if you are going to store data as not null keys with associate not null values, if you look internal structure of Hashtable then you will see, instance of Hashtable ...

We see the opentsdb process occasionally spinning CPU in user time, logs from querying the api/stats/threads HTTP interface show a thread resizing a HashMap at these times. We do not have a reproducer ...

Project Coin provides numerous “small language enhancements” as a subset of the new JDK 7 features. I recently blogged on Project Coin‘s switching on Strings and in this post I write about the new ...