JDK1.8新特性---初更新

jdk1.8新特新：已上传最新代码和文档doc: 文档和代码都提交至git git clone: https://github.com/cz12345/Daily-learning.git 切换至:jdk1.8newFeature分支即可,(git checkout -b jdk1.8newFeature origin/jdk1.8newFeature) 代码和word后续还会继续更新，有不对的地

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