Taking notes in class is not writing down everything the teacher has said, but recording the key points of the teacher's words after comprehension.
上课做笔记并不是把老师说的话全都记下来，而是在理解后记下老师所说的要点。
If you're just writing a single class to test your intuition about an API and you will throw it away immediately after running it once, then you don't have to put it in a package.
如果您在编写一个只使用一次就丢掉的类——比如测试一个API的类——则无需将它放到包中。
If you're just writing a single class to test your intuition about an API and you will throw it away immediately after running it once, then you don't have to put it in a package.
如果您在编写一个只使用一次就丢掉的类——比如测试一个API的类——则无需将它放到包中。
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