是否有安全的方法对 Java的类型物体适用组合功能?
• 设法采用“Number-generic”方法,在收集中采用过滤器。
唯一的通用做法是只采用抽象的<代码>Number类别界定的方法,这样,如果通过“安全”一词,你不会失去精确性,那么就没有了,因为Number规定的所有方法都警告他们可能四舍五入或打下结果(floatValue(和,杜布尔Value(,但只有四舍五入)。
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