2、 Map接口存储的是键值对，无法直接通过Iterator或foreach进行遍历输出，需先转换为相应的集合视图才能迭代访问其中的元素。

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 ...

Google Guava has much to offer the Java developer working with J2SE 5, Java SE 6, or Java SE 7. The older the version of these being used, the more useful Guava can be. Although Java SE 7 brings ...

SkyBlock is one of the best Minecraft maps ever created. It inspired several Minecraft servers to include SkyBlock as an independent game mode and even make several new types of tweaks to it. The ...

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 ...