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Java example source code file (FirstOrderIntegrator.java)

This example Java source code file (FirstOrderIntegrator.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

dimensionmismatchexception, firstorderdifferentialequations, firstorderintegrator, maxcountexceededexception, nobracketingexception, numberistoosmallexception, odeintegrator

The FirstOrderIntegrator.java Java example source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.math3.ode;

import org.apache.commons.math3.exception.DimensionMismatchException;
import org.apache.commons.math3.exception.MaxCountExceededException;
import org.apache.commons.math3.exception.NoBracketingException;
import org.apache.commons.math3.exception.NumberIsTooSmallException;

/** This interface represents a first order integrator for
 * differential equations.

 * <p>The classes which are devoted to solve first order differential
 * equations should implement this interface. The problems which can
 * be handled should implement the {@link
 * FirstOrderDifferentialEquations} interface.</p>
 *
 * @see FirstOrderDifferentialEquations
 * @see org.apache.commons.math3.ode.sampling.StepHandler
 * @see org.apache.commons.math3.ode.events.EventHandler
 * @since 1.2
 */

public interface FirstOrderIntegrator extends ODEIntegrator {

  /** Integrate the differential equations up to the given time.
   * <p>This method solves an Initial Value Problem (IVP).

* <p>Since this method stores some internal state variables made * available in its public interface during integration ({@link * #getCurrentSignedStepsize()}), it is <em>not thread-safe.

* @param equations differential equations to integrate * @param t0 initial time * @param y0 initial value of the state vector at t0 * @param t target time for the integration * (can be set to a value smaller than <code>t0 for backward integration) * @param y placeholder where to put the state vector at each successful * step (and hence at the end of integration), can be the same object as y0 * @return stop time, will be the same as target time if integration reached its * target, but may be different if some {@link * org.apache.commons.math3.ode.events.EventHandler} stops it at some point. * @exception DimensionMismatchException if arrays dimension do not match equations settings * @exception NumberIsTooSmallException if integration step is too small * @exception MaxCountExceededException if the number of functions evaluations is exceeded * @exception NoBracketingException if the location of an event cannot be bracketed */ double integrate (FirstOrderDifferentialEquations equations, double t0, double[] y0, double t, double[] y) throws DimensionMismatchException, NumberIsTooSmallException, MaxCountExceededException, NoBracketingException; }

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