JDK1.8新特性---初更新

jdk1.8新特新：已上傳最新代碼和文檔doc: 文檔和代碼都提交至git git clone: https://github.com/cz12345/Daily-learning.git 切換至:jdk1.8newFeature分支即可,(git checkout -b jdk1.8newFeature origin/jdk1.8newFeature) 代碼和word後續還會繼續更新，有不對的地

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