数字（数学）操作类 Math Random 类 ，大数字操作类

时间：2022-12-21 22:53:32

Math 提供了大量的数学操作方法

Math类中所有的方法都是static 方法

aaarticlea/png;base64,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" alt="" />

重点看这个操作，四舍五入

System.out.println(Math.round(-16.5)) ;　　　　　　-16

System.out.println(Math.round(16.5)) ;　　　　   　17

大于等于0.5进位。

Random类

取得随机数的类 java.util 包

aaarticlea/png;base64,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*z7x+0p+OeMcjKzgNvNhdnp31vcKnOyFt/jqtecfwlnOMzjpouGQADSC73YD0IVUAqALqQRAF1IJgC6kEgBdSCUAupBKAHQhlQDoQioB0IVUAqALqQRAF1IJgC6kEgBdSCUAupBKAHQhlQDoQioB0KVuKj0PWq7Bc/6j92nH+fuxPQ+c7rORnO561dg3ZOdYngetVqszfa/U86nvJ6DUXqlkZoozcY43i96nHaEb59JpGFSd4Kdiv+UqiUMqAbsdlko151kl0cloXfr4V92PfzcqtSeVgFKHppJ1ICwcOp2WeyRlT8v0pGIB5P9duLQwW7PZPh2EZ4YdCgVePiKTGiUdBkMSfminj1BPCd0K79t9n3aD4g5aR53LefdZvPmRcxWEPc7ccVKpM30Xpl/xAbdnafDaK3921ErTfC4Fg8g6DfoPwigcaHBqrEN5UC2/QWkqZT+w81AsA4MTs3cstCh5Ebv5UktSCSqcMpXEULI/++ICqDyV0h/5QRFJAa+ZG3xmBIPBwEqrMIl2r6SKUiQIjp23ZfAcWwiG140UlmFlKP8DOTdfaAnocNIVXDYVnMWHNavk6b4jlezCR4w9uSZyW+Vz833ayUIu+4tU0FXc3wlqn2qplF+4PJXski68D3Yk+kdiN186F1DhiLvdVWuleGdJkuxKJW+bpbw2idVKWaPBdNoxdUO62xNsMJUNyBO58DFqpfDxo3c3ww0uc2TnDntscwz4JCf6ZkA8D2LNvD2dXakU3/oJSwxhk7soFJyyYUfxJY5Ievv+Xo1X8pSVluKK2LpQPlSTZs7iMzwSey9SS/aVoMKJvkUZ/oKOfNtQeuaWN5XqAXkPpSREYg/1hGKrQoz63PWRv9PVapnt+UOfwVm3L+3Rrk/ti+96BifeGZ7BQRP+ixMAupBKAHQhlQDoQioB0IVUAqALqQRAF1IJgC6kEgBdSCUAupBKAHQhlQDoQioB0IVUAqALqQRAF1IJgC6kEgBdSCUAujScSq/9u95V9me2auCC22W7uOJRrvsx6fb6L0caXvIx6XrD6111l5vtsn2S+5MP/uj9mw6133B8AU2m0mv/rvh4bebDq+5yc+prBtPv4OueZpJ44/zaqfQVbjgUazCV/M/ra/9uONma1+HvVXNwONm6p9tzoDvrd82JQT/h9PP7yX6lZ5/77bLdXU5G7kG75+6sX0yScNgfk+5wMp+lp7fnH8mL9br6zdku23ez/igcW+mbFd+ROPhoKlX4h4jdt0gqKb3hUKzJWulj0u2JvzZXo+wztJkPr0avpnH2WXyZ+Ysad71gPspCP2W/uq1YdDvMPtDpdd2e0w99ekXnYNbyY9LtWZfuxYbhE1Ip6HznmxXfkTj4yHhi78j5h4jet521kqYbDsUa3+3Of5VdOYWS/brir9ywWayfYNdGGJZ03eJ1/tMksWapfdBc+mPSNWOwX9tjk5Ss4Kq/WfEdiYOXJ630jnZM7+C+fZUbDsU+7xncdtnOPjf2Fri1XvM+zZUmqtSPafAyuwo+qauRaR+fJO7MXI3CiW3mQ5OpFLzZne9IHrw4hnzw4T9E+VW+yg2HYg2m0sssX2hksk+b+Kt+z1ppRz+b+fDKndhl2yLaayWx2Ane0fFrpdL79lVuOBT7tGdw9udmx3ZG9mEt2hef9eCXqrQXY08qbxvCng/xPfV62xzNpNKuN1uUosfbV0rPKr9vX+WGQ7FP/L6S/aEJnvJIBzfzYf54ZRnZfhKfFoU1l7VPXPJwyl8yVH4kVDJJ3sY3l/dP4Y2pn0riTRPekTj4cPen2C/f/Qyu7L5pu+H4gvhud9OevkupBCBHKjVsPX5cfPYYANVIJQC6kEoAdCGVAOhCKgHQhVQCoAupBEAXUgmALqQSAF1IJQC6kEoAdCGVAOjyf93EeFtXEi4UAAAAAElFTkSuQmCC" alt="" />

产生100之内的随机整数

Random rand = new Random() ;

        for(int x =  ; x <  ; x ++){

            System.out.println(rand.nextInt() ) ;

        }

大整数操作类

如果现在操作的数据值很大，想到double

System.out.println(Double.MAX_VALUE * Double.MAX_VALUE) ;

超过double 结果是Infinity
如果超过double当然不能用double保存，现在只有String来保存这个数字。
在java中考虑到了这类情况，专门有了

BigInterger 和 BigDecimal

aaarticlea/png;base64,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" alt="" />

BIgInteger构造方法

aaarticlea/png;base64,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" alt="" />

BigInteger bigA = new BigInteger("") ;

        BigInteger bigB = new BigInteger("");

        System.out.println(bigA.add(bigB)) ;

        System.out.println(bigA.subtract(bigB));

数字（数学）操作类 Math Random 类 ，大数字操作类的更多相关文章

  1. 猜数字游戏，判断输入的数字与系统产生的数字是否一致（Math&period;random&lpar;&rpar;与if嵌套循环）

    package com.summer.cn; import java.util.Scanner; public class Test041509 { /** * java 随机数 Math * Mat ...

  2. 使用内置对象Math&period;random实现猜数字游戏

    function getRandom(min,max){ return Math.floor(Math.random()*(max-min+1))+min;    //得到两个数之间的随机整数,包含实 ...

  3. 初识Java（Java数字处理类-大数字运算&rpar;

    一.大数字运算 在 Java 中提供了大数字的操作类,即 java.math.BigInteger 类与  java.math.BigDecimal 类.这两个类用于高精度计算,体重 BigInteg ...

  4. java大数字操作：BigInteger&comma;BigDecimal&lpar;浮点型&rpar;

    java大数字操作: BigInteger:大数字整型的 BigDecimal(浮点型):大数字小数的,也适用大的整数 BigInteger: String num1 = "10038182 ...

  5. 使用Math&period;random&lpar;&rpar;函数生成n到m间的随机数字

    使用js生成n到m间的随机数字,主要目的是为后期的js生成验证码做准备,Math.random()函数返回0和1之间的伪随机数 讲解: 本文讲解如何使用js生成n到m间的随机数字,主要目的是为后期的j ...

  6. Math&period;random取随机整数

    Math.random可以随机获取0-1的数字,今天用的需要给id随机赋值,小数不好控制,就只取整. 网上很多是 int i=(int)(Math.random()*100): 报错: 后找到 var ...

  7. 随机产生1-12的整数 ， 根据产生整数输出一下该月份的季节信息（Math&period;random&lpar;&rpar;和if语句的应用）

    package com.summer.cn; /** * @author Summer *随机产生1-12的整数 , 根据产生整数输出一下该月份的季节信息 */ public class Test04 ...

  8. 常用类--Date日期类，SimpleDateFormat日期格式类，Calendar日历类，Math数学工具类，Random随机数类

    Date日期类 Date表示特定的时间,精确到毫秒; 构造方法: public Data() public Date(long date) 常用方法: public long getTime() pu ...

  9. Date日期类&comma;Canlendar日历类&comma;Math类&comma;Random随机数学类

    Date日期类,SimpleDateFormat日期格式类 Date  表示特定的时间,精确到毫秒 常用方法 getTime() setTime() before() after() compareT ...

随机推荐

  1. JavaScript函数的概念

    函数是这样的一段代码,它只定义一次,但可能被执行或调用任意多次. JavaScript函数是参数化的:函数的定义会包含形参,这些参数在函数的整体中像局部变量一样工作.函数调用时会为形参提供实参的值.除 ...

  2. 试听笔记：javascript入门精通

    一.数据类型 1.原始类型:number.string.boolean.null.undefined 2.对象类型:Object (Function.Array.Date...) P.类型隐式转换:' ...

  3. &lbrack;think in java&rsqb;知识点学习

    java中 全部数值都有正负号,不存在无符号整数. java中的基本类型存储在堆栈中. 其它对象存储在堆中. java确保数组会被初始化,并且不能在它的范围之外被訪问. 下面代码在c和c++中是合法的 ...

  4. css案例学习之table tr th td ul li实现日历

    效果 代码 <html> <head> <title>Calendar</title> <style> <!-- .month { b ...

  5. yii 使用 mongodb 小工具 YiiMongoDbSuite

    YiiMongoDbSuite下载链接: http://www.yiiframework.com/extension/yiimongodbsuite/ 如果你的yii和mongodb它已经建立了一个良 ...

  6. docker 创建docker用户组，应用用户加入用户组

    在Linux系统下使用docker,为了避免每次输入命令都需要sudo,可以把用户加入docker用户组 创建docker用户组 sudo groupadd docker 普通用户加入docker用户 ...

  7. react-native-background-job——让你的react-native项目实现后台运行

    安排在您的应用处于后台时运行JavaScript的后台任务. 即使应用程序已关闭,任务也会运行,默认情况下,也会在重新启动后继续存在. 这个库依赖于React Native的HeadlessJS ,目 ...

  8. c&num;基础思维导图

  9. java 数组声明方法

    //数组 public class Test16{ public static void main(String args[]){ //声明一: int [] x; x = new int[3];// ...

  10. CSU 1808&colon; 地铁 最短路

    题目链接: http://acm.csu.edu.cn/OnlineJudge/problem.php?id=1808 1808: 地铁 Time Limit: 5 SecMemory Limit: ...

相关文章