import org.apache.commons.math3.optim.univariate.SimpleUnivariateValueChecker; //导入依赖的package包/类
/**
 * The {@code BrentOptimizer} default stopping criterion uses the
 * tolerances to check the domain (point) values, not the function
 * values.
 * The {@code relativeTolerance} and {@code absoluteTolerance}
 * arguments are thus passed to a {@link SimpleUnivariateValueChecker
 * custom checker} that will use the function values.
 *
 * @param optimizer Optimizer on behalf of which the line search
 * be performed.
 * Its {@link MultivariateOptimizer#computeObjectiveValue(double[])
 * computeObjectiveValue} method will be called by the
 * {@link #search(double[],double[]) search} method.
 * @param relativeTolerance Search will stop when the function relative
 * difference between successive iterations is below this value.
 * @param absoluteTolerance Search will stop when the function absolute
 * difference between successive iterations is below this value.
 * @param initialBracketingRange Extent of the initial interval used to
 * find an interval that brackets the optimum.
 * If the optimized function varies a lot in the vicinity of the optimum,
 * it may be necessary to provide a value lower than the distance between
 * successive local minima.
 */
public LineSearch(MultivariateOptimizer optimizer,
                  double relativeTolerance,
                  double absoluteTolerance,
                  double initialBracketingRange) {
    mainOptimizer = optimizer;
    lineOptimizer = new BrentOptimizer(REL_TOL_UNUSED,
                                       ABS_TOL_UNUSED,
                                       new SimpleUnivariateValueChecker(relativeTolerance,
                                                                        absoluteTolerance));
    this.initialBracketingRange = initialBracketingRange;
}
 

import org.apache.commons.math3.optim.univariate.SimpleUnivariateValueChecker; //导入依赖的package包/类
/**
 * The "BrentOptimizer" default stopping criterion uses the tolerances
 * to check the domain (point) values, not the function values.
 * We thus create a custom checker to use function values.
 *
 * @param rel Relative threshold.
 * @param abs Absolute threshold.
 */
LineSearch(double rel,
           double abs) {
    super(REL_TOL_UNUSED,
          ABS_TOL_UNUSED,
          new SimpleUnivariateValueChecker(rel, abs));
}
 

import org.apache.commons.math3.optim.univariate.SimpleUnivariateValueChecker; //导入依赖的package包/类
/**
 * The "BrentOptimizer" default stopping criterion uses the tolerances
 * to check the domain (point) values, not the function values.
 * We thus create a custom checker to use function values.
 *
 * @param rel
 *            Relative threshold.
 * @param abs
 *            Absolute threshold.
 */
LineSearch(double rel, double abs)
{
	super(REL_TOL_UNUSED, ABS_TOL_UNUSED, new SimpleUnivariateValueChecker(rel, abs));
}