Package com.google.ortools.linearsolver

Class MPObjective

java.lang.Object
com.google.ortools.linearsolver.MPObjective
public class MPObjective
extends java.lang.Object
A class to express a linear objective.

  • Field Summary

    Fields
    Modifier and Type Field Description
    protected boolean swigCMemOwn  

  • Constructor Summary

    Constructors
    Modifier Constructor Description
    protected MPObjective​(long cPtr, boolean cMemoryOwn)  

  • Method Summary

    Modifier and Type Method Description
    double bestBound()
    Returns the best objective bound.

    In case of minimization, it is a lower bound on the objective value of the
    optimal integer solution.
    void clear()
    Clears the offset, all variables and coefficients, and the optimization
    direction.
    void delete()  
    protected void finalize()  
    double getCoefficient​(MPVariable var)
    Gets the coefficient of a given variable in the objective

    It returns 0 if the variable does not appear in the objective).
    protected static long getCPtr​(MPObjective obj)  
    boolean maximization()
    Is the optimization direction set to maximize?
    boolean minimization()
    Is the optimization direction set to minimize?
    double offset()
    Gets the constant term in the objective.
    void setCoefficient​(MPVariable var, double coeff)
    Sets the coefficient of the variable in the objective.

    If the variable does not belong to the solver, the function just returns,
    or crashes in non-opt mode.
    void setMaximization()
    Sets the optimization direction to maximize.
    void setMinimization()
    Sets the optimization direction to minimize.
    void setOffset​(double value)
    Sets the constant term in the objective.
    void setOptimizationDirection​(boolean maximize)
    Sets the optimization direction (maximize: true or minimize: false).
    double value()
    Returns the objective value of the best solution found so far.

    It is the optimal objective value if the problem has been solved to
    optimality.

    Note: the objective value may be slightly different than what you could
    compute yourself using MPVariable::solution_value(); please use the
    --verify_solution flag to gain confidence about the numerical stability of
    your solution.

    Methods inherited from class java.lang.Object

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

  • Field Details

    • swigCMemOwn

      protected transient boolean swigCMemOwn

  • Constructor Details

    • MPObjective

      protected MPObjective​(long cPtr, boolean cMemoryOwn)

  • Method Details

    • getCPtr

      protected static long getCPtr​(MPObjective obj)

    • finalize

      protected void finalize()
      Overrides:
      finalize in class java.lang.Object

    • delete

      public void delete()

    • clear

      public void clear()
      Clears the offset, all variables and coefficients, and the optimization
      direction.

    • setCoefficient

      public void setCoefficient​(MPVariable var, double coeff)
      Sets the coefficient of the variable in the objective.

      If the variable does not belong to the solver, the function just returns,
      or crashes in non-opt mode.

    • getCoefficient

      public double getCoefficient​(MPVariable var)
      Gets the coefficient of a given variable in the objective

      It returns 0 if the variable does not appear in the objective).

    • setOffset

      public void setOffset​(double value)
      Sets the constant term in the objective.

    • offset

      public double offset()
      Gets the constant term in the objective.

    • setOptimizationDirection

      public void setOptimizationDirection​(boolean maximize)
      Sets the optimization direction (maximize: true or minimize: false).

    • setMinimization

      public void setMinimization()
      Sets the optimization direction to minimize.

    • setMaximization

      public void setMaximization()
      Sets the optimization direction to maximize.

    • maximization

      public boolean maximization()
      Is the optimization direction set to maximize?

    • minimization

      public boolean minimization()
      Is the optimization direction set to minimize?

    • value

      public double value()
      Returns the objective value of the best solution found so far.

      It is the optimal objective value if the problem has been solved to
      optimality.

      Note: the objective value may be slightly different than what you could
      compute yourself using MPVariable::solution_value(); please use the
      --verify_solution flag to gain confidence about the numerical stability of
      your solution.

    • bestBound

      public double bestBound()
      Returns the best objective bound.

      In case of minimization, it is a lower bound on the objective value of the
      optimal integer solution. Only available for discrete problems.