java开发常用工具类大全，程序员必备工具

[{"title":"（ 59 个子文件 100KB ） java开发常用工具类大全，程序员必备工具","children":[{"title":"Java工具类包","children":[{"title":"util","children":[{"title":"collection","children":[{"title":"CollectionUtil.java <span style='color:#111;'> 1.23KB </span>","children":null,"spread":false},{"title":"CollectionSort.java <span style='color:#111;'> 2.91KB </span>","children":null,"spread":false}],"spread":true},{"title":"CharsetUtil.java <span style='color:#111;'> 7.97KB </span>","children":null,"spread":false},{"title":"StringUtil.java <span style='color:#111;'> 23.09KB </span>","children":null,"spread":false},{"title":"Reflection.java <span style='color:#111;'> 4.53KB </span>","children":null,"spread":false},{"title":"RandomUtil.java <span style='color:#111;'> 4.55KB </span>","children":null,"spread":false},{"title":"JFreeChartUtil.java <span style='color:#111;'> 9.23KB </span>","children":null,"spread":false},{"title":"CE.java <span style='color:#111;'> 3.16KB 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