lab.art

Class Cosine

java.lang.Object

lab.art.Expression

lab.art.UnaryExpression

lab.art.Cosine

public class Cosine
extends UnaryExpression

This class represents the cosine expression.

Constructor Summary

Constructors

Constructor and Description
Cosine(Expression expression) Initializes this cosine expression with the given subexpression.

Method Summary

Methods

Modifier and Type	Method and Description
double	evaluate(double x, double y) Evaluates this cosine expression at the given x- and y-coordinate.
String	toString() Returns a string representation of this cosine expression.

Methods inherited from class lab.art.UnaryExpression

equals, evaluate, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Cosine

public Cosine(Expression expression)

Initializes this cosine expression with the given subexpression.

Parameters:

expression - the subexpression.

Precondition:

expression != null

Method Detail

evaluate

public double evaluate(double x,
              double y)

Evaluates this cosine expression at the given x- and y-coordinate.

Specified by:

evaluate in class Expression

Parameters:

x - the x-coordinate.

y - the y-coordinate.

Precondition:

x >= -1 && x <= 1, y >= -1 && y <= 1

Returns:

the value of this cosine expression at the given x- and y-coordinate.

toString

public String toString()

Returns a string representation of this cosine expression. The string consists of "cos(pi * " followed by the string representation of the subexpression, followed by ")".

Overrides:

toString in class Object

Returns:

string representation of this cosine expression.