How LinkedHashSet Works Internally in Java | Java Hungry

How LinkedHashSet Works Internally in Java | Java Hungry
What is Initial capacity  and load factor?

The capacity is the number of buckets(used to store key and value) in the Hash table , and the initial capacity is simply the capacity at the time  Hash table is created.

The load factor is a measure of how full the Hash table is allowed to get before its capacity is automatically increased.
http://692088846.iteye.com/blog/2076452

     Set是通过Map来支持的，Set接口里的所有方法，都委托给内部的Map去实现。

http://zhouyunan2010.iteye.com/blog/1236220

1. /** 
2.  * LinkedHashSet实际上是基于LinkedHashMap的基础上实现的， 
3.  * LinkedHashSet继承自HashSet，在HashSet中有一构造方法 
4.  * HashSet(int initialCapacity, float loadFactor, boolean dummy)  
5.  * 第三个参数dummy为true时new出了一个LinkedHashMap实例，以Set中的 
6.  * 元素为键，以一个Object的虚假的对象为值，所以HashSet中的元素不可能重复。 
7.  * 以下构造函数dummy都为true 
8.  */  
9. public class LinkedHashSet<E>  
10. extends HashSet<E>  
11. implements Set<E>, Cloneable, java.io.Serializable {  
12.   
13. private static final long serialVersionUID = -2851667679971038690L;  
14.   
15.   
16. public LinkedHashSet(int initialCapacity, float loadFactor) {  
17.     super(initialCapacity, loadFactor, true);  
18. }  
19.   
20.   
21. public LinkedHashSet(int initialCapacity) {  
22.     super(initialCapacity, .75f, true);  
23. }  
24.   
25.   
26. public LinkedHashSet() {  
27.     super(16, .75f, true);  
28. }  
29.   
30.   
31. public LinkedHashSet(Collection<? extends E> c) {  
32.     super(Math.max(2*c.size(), 11), .75f, true);  
33.     addAll(c);  
34. }  
35. } 

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