In Java, LinkedHashMap is an implementation of linkedlist from the interface Map. It is similar to HashMap, where an extra feature is included that maintains the order of elements that are being inserted into it
[b]1、通过Entry 遍历Map[/b] java中这种以键值对存在的方式被称为Map.Entry。Map.entrySet()返回的是一个key-value 集合,这是一种非常高效的遍历方式。 for(Entry entry: map.entrySet()) { // get key K key = entry.getKey(); // get value V value = entry.getValue(); } 1. 2. 3. 4....
Java文档写道: HashMap类和Hashtable类几乎相同,不同之处在于HashMap是不同步的,也允许接受null键和null值。 5. LinkedHashMap LinkedHashMap is a subclass of HashMap. That means it inherits the features of HashMap. In addition, the linked list preserves the insertion-order. Let’s replace the Has...
but I decided against it in favor of String to keep the program simple. Since almost every Java developer knows aboutString, it makes the application much more acceptable, and the focus remains only on Java 8 features.