This commit provides a new feature to compare elements of commonly used objects of same types like Map, HashMap, LinkedHashMap, ConcurrentHashMap, Hashtable ...

A colleague of mine recently ran into an issue that I have not run into myself, but found to be interesting and, in my opinion, worth blogging about here. During some distributed Java development, my ...

如果HashMap的键(key)是自定义的对象，那么需要按规则定义它的equals()和hashCode()方法。 class Dog { String color; Dog(String c) { color = c ...

While the Hashtable was part of the initial Java release over two decades ago, the HashMap is the correct key-value store to use today. One key HashMap vs. Hashtable difference is the fact that the ...