我注意到人们倾向于进口<代码>javax.swing。 JFrame und javax.swing.*, import java.math.BigInteger und javamath.*. 进口整个包裹是否有任何下降,而不是具体进口,或者是否有任何进口的进口?
通常,单类进口更可取,因为单类进口很容易估算出哪类进口。 随着现代的民主选举,它非常容易。 因此,它常常被视为一种好风格。 包装和单类进口之间没有差别。
只有一个点 我对一揽子进口产品的理解是,如果在一揽子方案中增加这些类别,它们会造成问题,从而造成模糊。 同jdk 1.1在java.awt包裹中仅包含一个清单类别,jdk1.2在java.util包中引入另一个清单类别。
无。
这似乎还重复了。 问题。
You might notice a slower compilation time when you do wildcard import, this is because all classes would be loaded by the compiler at compile time. But it has no effect to the runtime performance.
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