. ├── week1/ │ ├── Main.java # Main program with word counting logic ├── week2/ │ ├── Four.java # No abstractions or library functions │ ├── Five.java # Decomposed in procedural abstractions │ ├── Six ...
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Map接口使用要点
2、 Map接口存储的是键值对，无法直接通过Iterator或foreach进行遍历输出，需先转换为相应的集合视图才能迭代访问其中的元素。
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