If a class has one or more private constructors and no public constructors, other classes (except nested classes) cannot create instances of this class.

如果类具有一个或多个私有构造函数而没有公共构造函数，则其他类(除嵌套类外)无法创建该类的实例。

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If a class has one or more private constructors and no public constructors, other classes (except nested classes) cannot create instances of this class.

如果类具有一个或多个私有构造函数而没有公共构造函数，则其他类(除嵌套类外)无法创建该类的实例。

youdao