Add Article 4 for Effective Java #5
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yanglbme
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Jul 1, 2019
docs/effective-java.md
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| 如上，由于显示的构造器是私有的，则不会在类的外部被实例化。 AssertionError 不是必须的，但是这样写，可以避免在类的内部调用构造器。它保证该类在任何情况下都不会被实例化。 | ||
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| `注意`这种用法也有副作用，它使得一个类不能被子类化。因为所有的构造器都必须显式或隐式地调用超类（superclass）构造器，在上面这种情况下，子类就没有可访问的超类构造器去调用了。 |
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中文词建议用中文(加粗)的方式，英文词才用 English
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| `注意`这种用法也有副作用，它使得一个类不能被子类化。因为所有的构造器都必须显式或隐式地调用超类（superclass）构造器，在上面这种情况下，子类就没有可访问的超类构造器去调用了。 | |
| **注意**这种用法也有副作用，它使得一个类不能被子类化。因为所有的构造器都必须显式或隐式地调用超类（superclass）构造器，在上面这种情况下，子类就没有可访问的超类构造器去调用了。 |
yanglbme
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Jul 1, 2019
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Add Article 4 for Effective Java