第202題

Given:
NumberNames nn = new NumberNames();
nn.put("one", 1);
System.out.println(nn.getNames());
Place the code into position to create a class that maps from Strings to integer values. The result of execution must be [one]. Some options may be used more than once.


答案：

參考：12-5-1 HashMap

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泛型使用不可以用基本型態, 所以 int 要放入 Integer.