The Java implementation reads the expression from the file and saves the calculation results to another file

Filename	Size	Update
实验1-5
实验1-5\experiment_5
实验1-5\experiment_5\.idea
实验1-5\experiment_5\.idea\inspectionProfiles
实验1-5\experiment_5\.idea\inspectionProfiles\Project_Default.xml	258	2017-12-08
实验1-5\experiment_5\.idea\misc.xml	273	2017-12-08
实验1-5\experiment_5\.idea\modules.xml	264	2017-12-08
实验1-5\experiment_5\.idea\workspace.xml	18450	2017-12-08
实验1-5\experiment_5\experiment_5.iml	423	2017-12-08
实验1-5\experiment_5\out
实验1-5\experiment_5\out\production
实验1-5\experiment_5\out\production\experiment_5
实验1-5\experiment_5\out\production\experiment_5\Calculate.class	5813	2017-12-08
实验1-5\experiment_5\out\production\experiment_5\CalcuStrategy.class	1588	2017-12-08
实验1-5\experiment_5\src
实验1-5\experiment_5\src\exp_5.java	10359	2017-12-08
实验1-5\王晶-20151120285-实验1-5.docx	49609	2017-12-02

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