Java8Optional类
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Java8中新判空方法之Optional类的使用详解
目录认识OptionalOptional对象创建Optional.get()方法(返回对象的值)Optional.isPresent()方法(判读是否为空)Optional.ifPresent()方法(判读是否为空并返回函数)Optional.filter()方法(过滤对象)Optional.flatMap()方[详细]
2022-12-30 10:39 分类:开发 What's wrong with my multidimensional - array declaration? C#
private int[, ,] table = new int[4 , 5 , 5]{ {{0,6,2,6,4},{2,2,4,2,8},{4,4,8,4,6},{6,6,2,6,4},{8,8,6,8,2}},[详细]
2022-12-18 08:37 分类:问答