java Math类

 

package com.oracle.demo01;
//Math类
public class DemoMath {
    public static void main(String[] args) {
        //取绝对值
        System.out.println(Math.abs(-6.6));
        //向上取整
        System.out.println(Math.ceil(12.1));
        //向下取整
        System.out.println(Math.floor(12.9));
        //取两数最大值
        System.out.println(Math.max(12, 5));
        //取两数最小值
        System.out.println(Math.min(12, 5));
        //次幂
        System.out.println(Math.pow(2, 10));
        //随机小数
        System.out.println(Math.random());
        //四舍五入
        System.out.println(Math.round(5.6));
    }
}

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