ThreadLocal结构图

根据提供的引用内容，ThreadLocal的结构图如下所示：

ThreadLocal
    - ThreadLocalMap threadLocals
        - Entry[] table
            - Entry
                - ThreadLocal key
                - Object value
        - int size
        - int threshold
        - void setThreshold(int len)
        - Entry[] getTable()
        - void set(Object key, Object value)
        - void remove(Object key)
        - void resize()
        - Entry getEntry(ThreadLocal key)
        - void createEntry(ThreadLocal key, Object value)
    - ThreadLocalMap inheritableThreadLocals
        - Entry[] table
            - Entry
                - ThreadLocal key
                - Object value
        - int size
        - int threshold
        - void setThreshold(int len)
        - Entry[] getTable()
        - void set(Object key, Object value)
        - void remove(Object key)
        - void resize()
        - Entry getEntry(ThreadLocal key)
        - void createEntry(ThreadLocal key, Object value)

其中，ThreadLocalMap是ThreadLocal的内部类，用于存储线程本地变量。ThreadLocalMap中包含一个Entry数组，每个Entry包含一个ThreadLocal对象和一个Object对象，用于存储线程本地变量的值。ThreadLocalMap还包含size、threshold等属性，用于控制数组的大小和扩容。ThreadLocalMap中的set、get、remove等方法用于操作线程本地变量。