org.aoju.bus.core.math

Class Formula

java.lang.Object

org.aoju.bus.core.math.Formula

public class Formula
extends Object

数学表达式

Since:

JDK 1.8+

Version:

6.3.5

Author:

Kimi Liu

Constructor Summary

Constructors

Constructor and Description
Formula()

Method Summary

Modifier and Type	Method and Description
double	calculate(String expression) 按照给定的表达式计算
boolean	compare(char cur, char peek) 利用ASCII码-40做下标去算术符号优先级
static double	conversion(String expression) 计算表达式的值

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Formula

public Formula()

Method Detail

conversion

public static double conversion(String expression)

计算表达式的值

Parameters:

expression - 表达式

Returns:

计算结果

calculate

public double calculate(String expression)

按照给定的表达式计算

Parameters:

expression - 要计算的表达式例如: 1+2*(3+5)/7

Returns:

计算结果

compare

public boolean compare(char cur,
                       char peek)

利用ASCII码-40做下标去算术符号优先级

Parameters:

cur - 下标

peek - peek

Returns:

优先级，如果cur高或相等，返回true，否则false