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java 向上或向下取整Math

2011-12-17 20:52:47| 分类： java基础总结 | 标签： |举报 |字号大中小订阅

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向上取整用Math.ceil(double a)

向下取整用Math.floor(double a)

举例：

double a=35;
  double b=20;
  double c = a/b;
  System.out.println("c===>"+c);   //1.75
  System.out.println("c===>"+Math.ceil(c)); //2.0
  System.out.println(Math.floor(c)); //1.0

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