Capacity expansion mechanism of map

Catalog

1. Expansion calculation method  ：

 2. How to view the capacity after expansion （ Need to use reflection mechanism ）

 3. Output the capacity after print expansion , Regular pattern

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1. Expansion calculation method  ：

 2. How to view the capacity after expansion （ Need to use reflection mechanism ）

 3. Output the capacity after print expansion , Regular pattern

 Whenever the original capacity is reached 0.75 It's going to expand , That is to say ：
16*0.75=12
 If the memory used reaches 12 It will expand to 32