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Feb 22nd, 2018
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java的`泛型`又被称为`约束`
以前不太明白为什么这么称呼,在实际的封装项目通用方法的过程中,发现`约束`这个称呼,真的是一语道尽`泛型`的妙用:
有时会在类上面声明泛型,然而在类上面声明的泛型不是约束类本身的。而是通过约束这个类,达到约束类里面各个属性和函数的目的,使类里面的属性的类型能
由外部加以控制,函数参数的参数类型能够从外部加以控制
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