5. Performance Considerations Just likeHashMap,LinkedHashMapperforms the basicMapoperations of add, remove and contains in constant-time, as long as the hash function is well-dimensioned. It also accepts a null key as well as null values. However, thisconstant-time performance ofLinkedHashMapis ...
HashMap is implemented as a hash table, and there is no ordering on keys or values. TreeMap is implemented based on red-black tree structure, and it is ordered by the key. LinkedHashMap preserves the insertion order Hashtable is synchronized, in contrast to HashMap. This gives us the re...
36 private void linkNodeLast(LinkedHashMap.Entry<K,V> p) { 37 LinkedHashMap.Entry<K,V> last = tail; 38 tail = p; 39 //如果last == null,说明此前链表为空,则头结点应为 p 40 if (last == null) 41 head = p; 42 else { 43 //更新结点间的引用 44 p.before = last...
Performance is likely to be just slightly below that of ComcurrentHashMap, due to the added expense of maintaining the linked list, with one exception: Iteration over the collection-views of a ConcurrentLinkedHashMap requires time proportional to the size of the map, regardless of its capacity....
add LinkedHashMap Jun 20, 2018 1 package java.util; 2 3 import java.util.function.Consumer; 4 import java.util.function.BiConsumer; 5 import java.util.function.BiFunction; 6 import java.io.IOException; 7 8 public class LinkedHashMap<K,V> 9 extends HashMap<K,V> 10 implem...
LinkedHashMap.Entry<K,V> last = tail; tail = p; //如果last == null,说明此前链表为空,则头结点应为 p if (last == null) head = p; else { //更新结点间的引用 p.before = last; last.after = p; } } //将结点 src 替换为 dst private void transferLinks(Linked...