Package org.apache.commons.math4.legacy.core

Interface FieldElement<T>

Type Parameters:

T - the type of the field elements

All Known Subinterfaces:

RealFieldElement<T>

All Known Implementing Classes:

BigReal, DerivativeStructure, Dfp, DfpDec, SparseGradient

public interface FieldElement<T>

Interface representing field elements.

Since:

2.0

See Also:

Field

Method Summary

Modifier and Type	Method	Description
T	add(T a)	Compute this + a.
T	divide(T a)	Compute this ÷ a.
Field<T>	getField()	Get the Field to which the instance belongs.
T	multiply(int n)	Compute n × this.
T	multiply(T a)	Compute this × a.
T	negate()	Returns the additive inverse of this element.
T	reciprocal()	Returns the multiplicative inverse of this element.
T	subtract(T a)	Compute this - a.

Method Detail

add

T add(T a)
throws NullArgumentException

Compute this + a.

Parameters:

a - element to add

Returns:

a new element representing this + a

Throws:

NullArgumentException - if a is null.

subtract

T subtract(T a)
    throws NullArgumentException

Compute this - a.

Parameters:

a - element to subtract

Returns:

a new element representing this - a

Throws:

NullArgumentException - if a is null.

negate

T negate()

Returns the additive inverse of this element.

Returns:

the opposite of this.

multiply

T multiply(int n)

Compute n × this. Multiplication by an integer number is defined as the following sum:

n × this = ∑_i=1ⁿ this.

Parameters:

n - Number of times this must be added to itself.

Returns:

A new element representing n × this.

multiply

T multiply(T a)
    throws NullArgumentException

Compute this × a.

Parameters:

a - element to multiply

Returns:

a new element representing this × a

Throws:

NullArgumentException - if a is null.

divide

T divide(T a)
  throws NullArgumentException,
         MathArithmeticException

Compute this ÷ a.

Parameters:

a - element to divide by

Returns:

a new element representing this ÷ a

Throws:

NullArgumentException - if a is null.

MathArithmeticException - if a is zero

reciprocal

T reciprocal()
      throws MathArithmeticException

Returns the multiplicative inverse of this element.

Returns:

the inverse of this.

Throws:

MathArithmeticException - if this is zero

getField

Field<T> getField()

Get the Field to which the instance belongs.

Returns:

Field to which the instance belongs