JDK8 Map新函数merge()的学习理解
自己用JDK8也有蛮久了。里面加了些什么东西我都没好好去了解,今天学了点皮毛。记录一下:Map里的新函数,源码如下:/** * If the specified key is not already associated with a value or is * associated with null, associates it with the given non-null value. * Otherwise, replaces the associated value with t
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2020-11-06 14:53:01 ·
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