小何才露尖尖角

public class MathDemo {public static void main(String args[]){/*** abs求绝对值*/System.out.println(Math.abs(-10.4));//10.4System.out.println(Math.abs(10.1));//10.1/*** ceil天花板的意思，就是返回大的值，注意一些特殊值*/System.out.println(Math.ceil(-10.1));//-10.0System.out.println(Math.ceil(10.7));//11.0System.out.println(Math.ceil(-0.7));//-0.0System.out.println(Math.ceil(0.0));//0.0System.out.println(Math.ceil(-0.0));//-0.0/*** floor地板的意思，就是返回小的值*/System.out.println(Math.floor(-10.1));//-11.0System.out.println(Math.floor(10.7));//10.0System.out.println(Math.floor(-0.7));//-1.0System.out.println(Math.floor(0.0));//0.0System.out.println(Math.floor(-0.0));//-0.0/*** max 两个中返回大的值,min和它相反，就不举例了*/System.out.println(Math.max(-10.1, -10));//-10.0System.out.println(Math.max(10.7, 10));//10.7System.out.println(Math.max(0.0, -0.0));//0.0/*** random 取得一个大于或者等于0.0小于不等于1.0的随机数*/System.out.println(Math.random());//0.08417657924317234System.out.println(Math.random());//0.43527904004403717/*** rint 四舍五入，返回double值* 注意.5的时候会取偶数*/System.out.println(Math.rint(10.1));//10.0System.out.println(Math.rint(10.7));//11.0System.out.println(Math.rint(11.5));//12.0System.out.println(Math.rint(10.5));//10.0System.out.println(Math.rint(10.51));//11.0System.out.println(Math.rint(-10.5));//-10.0System.out.println(Math.rint(-11.5));//-12.0System.out.println(Math.rint(-10.51));//-11.0System.out.println(Math.rint(-10.6));//-11.0System.out.println(Math.rint(-10.2));//-10.0/*** round 四舍五入，float时返回int值，，double时返回long值*/System.out.println(Math.round(10.1));//10System.out.println(Math.round(10.7));//11System.out.println(Math.round(10.5));//11System.out.println(Math.round(10.51));//11System.out.println(Math.round(-10.5));//-10System.out.println(Math.round(-10.51));//-11System.out.println(Math.round(-10.6));//-11System.out.println(Math.round(-10.2));//-10}}

失败是成功之母