myUtil

Class Calculator

java.lang.Object

myUtil.Calculator

public class Calculator
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
Calculator()

Method Summary

Modifier and Type	Method and Description
static double	evaluate(java.lang.String infix) This method will evaluate an infix arithmetic expression.
static double	evaluatePostfix(java.lang.String postfix) This method will evaluate a postfix arithmetic expression.
static java.lang.String	infixToPostfix(java.lang.String infix) This method will convert an arithmetic expression from infix to postfix notation

Methods inherited from class java.lang.Object

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

Constructor Detail

Calculator

public Calculator()

Method Detail

evaluatePostfix

public static double evaluatePostfix(java.lang.String postfix)

This method will evaluate a postfix arithmetic expression.

Parameters:

postfix - expression in String, tokens are separated by space.

Returns:

the value of the expression in double.

Throws:

java.lang.ArithmeticException - exception with appropriate message

evaluate

public static double evaluate(java.lang.String infix)

This method will evaluate an infix arithmetic expression.

Parameters:

infix - expression String

Returns:

the value of the expression in double

Throws:

java.lang.ArithmeticException - exception with appropriate message

infixToPostfix

public static java.lang.String infixToPostfix(java.lang.String infix)

This method will convert an arithmetic expression from infix to postfix notation

Parameters:

infix - is a string of arithmetic expression in infix notation.

Returns:

postfix notation in a string, tokens are separated by a space

Throws:

java.lang.ArithmeticException - exception with appropriate message