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6 年
笔记《Thinking in Java》第5章 初始化与清理.md
如果没有构造方法,则实行默认的构造方法。如果自己创建了有参的构造方法,那么默认的无参构造方法就失效了。需要的话要自己创建。 构造方法是没有返回值的(跟返回void不一样)。不过在构造方法里还是可以单独的使用return来表示程序结束。 构造方法只能 ...
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