String>books;publicLibrary(){books=newLinkedHashMap<>();}publicvoidaddBook(Stringtitle,Stringauthor){books.put(title,author);}publicvoidcompareBooks(Stringtitle1,Stringtitle2){if(books.containsKey(title1)&&books.containsKey(title2)){intpos1=getInsertionOrder(title1);intpos2=getInsertionOrder...
false for insertion-order. * true表示最近最少使用次序，false
* 双向链表的头节点*/privatetransientEntry<K,V>header;/*** The iteration ordering method for this linked hash map: true * for access-order, false for insertion-order. * true表示最近最少使用次序,false表示插入顺序*/privatefinalbooleanaccessOrder; LinkedHashMap一共提供了五个构造方法: //构造方法1...
Note that insertion order is not affected if a key is re-inserted into the map. (A key k is reinserted into a map m if m.put(k, v) is invoked when m.containsKey(k) would return true immediately prior to the invocation.) This implementation spares its clients from the unspecified, ...
访问顺序(access order)。非常实用,可以使用这种顺序实现LRU(Least Recently Used)缓存 插入顺序(insertion orde)。同一key的多次插入,并不会影响其顺序 源码分析 首先打开Eclipse的outline面版看看LinkedHashMap里面有那些成员 LinkedHashMap结构 可以看到,由于LinkedHashMap继承自HashMap,所以大部分的方法都是根据key的有...
interface, with predictable iteration order. This implementation differs from HashMap in that it maintains adoubly-linked listrunning through all of its entries. This linked list defines the iteration ordering, which is normally the order in which keys were inserted into the map (insertion-order)....
This linked list defines the encounter order (the order of iteration), which is normally the order in which keys were inserted into the map (insertion-order). The least recently inserted entry (the eldest) is first, and the youngest entry is last. Note that encounter order is not affected...
afterNodeInsertion(evict); // 注释11 LinkedHashMap 中重写此方法, LRU用来删除头结点的方法, return null; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26.
* for access-order, <tt>false</tt> for insertion-order. * * @serial */privatefinalbooleanaccessOrder;//true表示按照访问顺序迭代,false时表示按照插入顺序 成员方法定义 从下图我们可以看出,LinkedHashMap中并增加没有额外方法。也就是说,LinkedHashMap与HashMap在操作上大致相同,只是在实现细节上略有不同罢...
Map.Entry<K,V>eldest){returnfalse;}创建节点由于afterNodeInsertion()方法并没有把新节点插入到双链表...