hussam.math.operations
Class Variable

java.lang.Object
hussam.math.operations.Variable

All Implemented Interfaces:

Operation

Direct Known Subclasses:

Constant

public class Variable
extends java.lang.Object
implements Operation

A Variable is an operation indicating a variable amount. A Variable has a name indicating a key mapping for the operation it stores.

Since:

2.0

Author:

Hussam Al-Mulhim حسام الملحم

See Also:

Operation, ConstantNumber, Constant, Function

Variable

public Variable(java.lang.String name)

Construcs a New Variable given the name.

Parameters:

name - The name of the variable.

getName

public java.lang.String getName()

Returns the name of the variable.

Returns:

name of the Variable.

setOperation

public void setOperation(Operation o)

Sets the operation from which the result of this variable will be calculated. For example, you can set this variable to a ConstantNumber using:

variable.setOperation(new ConstantNumber(50));
 System.out.println(variable.result());

 Output:
 50.0

Parameters:

o - The operation from which the result will be calculated.

result

public double result()
              throws MathException

Description copied from interface: Operation

returns the result of the operation.

Specified by:

result in interface Operation

Returns:

The result value.

Throws:

MathException - Throws MathException if there is a Math Exception!!

toString

public java.lang.String toString()

Returns the name of the variable.

Overrides:

toString in class java.lang.Object

Returns:

the name of the variable.