fix: 图片链接

Author: wardseptember

docs/B树和B+树详解.md

@@ -5,14 +5,14 @@
 LinkedHashSet是一个能记录插入顺序的hashset，继承自HashSet，主要调用HashSet下面这个构造方法。
 
 ```java
-    HashSet(int initialCapacity, float loadFactor, boolean dummy) {
-        map = new LinkedHashMap<>(initialCapacity, loadFactor);
-    }
+HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+map = new LinkedHashMap<>(initialCapacity, loadFactor);
+}
 ```
 
 LinkedHashSet使用LinkedHashMap实现的，LinkedHashMap又继承自HashMap，如果你看过我写的[LinkedHashMap源码分析](https://wardseptember.gitee.io/mynotes/#/docs/Java%E9%9B%86%E5%90%88%E5%8C%85/LinkedHashMap%E6%BA%90%E7%A0%81%E5%88%86%E6%9E%90)和[HashSet源码分析](https://wardseptember.gitee.io/mynotes/#/docs/Java%E9%9B%86%E5%90%88%E5%8C%85/HashSet%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90)，理解LinkedHashSet就非常容易了。
 
-<div align="center"> <img src="../../imgs/20201206181926.png" width="600"/> </div><br>
+<div align="center"> <img src="https://raw.githubusercontent.com/wardseptember/notes/master/imgs/20201206181926.png" width="600"/> </div><br>
 
 LinkedHashSet是基于双向链表和HashMap实现的，HashMap的key就是LinkedHashSet就是不重复的集合，HashMap的Value指向同一个Object实例。
 
@@ -22,42 +22,42 @@ LinkedHashSet是基于双向链表和HashMap实现的，HashMap的key就是Linke
 
 ```java
 public class LinkedHashSet<E>
-    extends HashSet<E>
-    implements Set<E>, Cloneable, java.io.Serializable {
+extends HashSet<E>
+implements Set<E>, Cloneable, java.io.Serializable {
 
-    private static final long serialVersionUID = -2851667679971038690L;
+private static final long serialVersionUID = -2851667679971038690L;
 
-    public LinkedHashSet(int initialCapacity, float loadFactor) {
-        super(initialCapacity, loadFactor, true);
-    }
+public LinkedHashSet(int initialCapacity, float loadFactor) {
+super(initialCapacity, loadFactor, true);
+}
 
-    public LinkedHashSet(int initialCapacity) {
-        super(initialCapacity, .75f, true);
-    }
+public LinkedHashSet(int initialCapacity) {
+super(initialCapacity, .75f, true);
+}
 
-    public LinkedHashSet() {
-        super(16, .75f, true);
-    }
+public LinkedHashSet() {
+super(16, .75f, true);
+}
 
-    public LinkedHashSet(Collection<? extends E> c) {
-        super(Math.max(2*c.size(), 11), .75f, true);
-        addAll(c);
-    }
+public LinkedHashSet(Collection<? extends E> c) {
+super(Math.max(2*c.size(), 11), .75f, true);
+addAll(c);
+}
 
 
-    @Override
-    public Spliterator<E> spliterator() {
-        return Spliterators.spliterator(this, Spliterator.DISTINCT | Spliterator.ORDERED);
-    }
+@Override
+public Spliterator<E> spliterator() {
+return Spliterators.spliterator(this, Spliterator.DISTINCT | Spliterator.ORDERED);
+}
 }
 ```
 
 LinkedHashSet的构造方法都调用了HashSet同一个构造方法，
 
 ```java
-    HashSet(int initialCapacity, float loadFactor, boolean dummy) {
-        map = new LinkedHashMap<>(initialCapacity, loadFactor);
-    }
+HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+map = new LinkedHashMap<>(initialCapacity, loadFactor);
+}
 ```
 
 LinkedHashSet是基于LinkedHashMap实现的，就是调用HashMap，看一下他的add方法吧
@@ -67,9 +67,9 @@ LinkedHashSet是基于LinkedHashMap实现的，就是调用HashMap，看一下
 他的add方法就是hashset的add方法
 
 ```java
-    public boolean add(E e) {
-        return map.put(e, PRESENT)==null;
-    }
+public boolean add(E e) {
+return map.put(e, PRESENT)==null;
+}
 ```
 
-LinkedHashMap没有覆写put方法，所以还是调用HashMap的put方法，HashMap的put方法又调用了putVal方法，putVal新增结点调用了newNode方法，LinkedHashMap覆写了newNode方法，在newNode方法中实现了链表功能。
+LinkedHashMap没有覆写put方法，所以还是调用HashMap的put方法，HashMap的put方法又调用了putVal方法，putVal新增结点调用了newNode方法，LinkedHashMap覆写了newNode方法，在newNode方法中实现了链表功能。