How the HashMap class is internally implemented, its initial capacity and re-sizing and its behavior in a multi-threaded scenario.
Java Miscellaneous Tips
Java Map: How to Get Sorted Keys
The LinkedHashMap class implements the Map interface and preserves the order in which the keys are inserted into it.
Java Map: Preserve Insertion Order
The LinkedHashMap class implements the Map interface and preserves the order in which the keys are inserted into it.
Java Double: Parse String with Comma
Parsing strings into Double values can be tricky sometimes. We show in this post some common scenarios and how to deal with them.