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51CTO
3 年
Arrays.asList()得到的是真的ArrayList?操作修改集合大坑
使用工具类 Arrays.asList() 把数组转换成集合时,不能使用其修改集合相关的方法,它的 add / remove / clear 方法会抛出 UnsupportedOperationException 异常。 一、前言 今天在看阿里Java规范的时候看到一条规范,经常使用,却一直没有注意的一条! 相信大家应该踩过这个坑 ...
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