Merge pull request #373 from Serrof/issue-372

Serrof · web-flow · commit 24df8abc2ce2 · 2025-02-07T22:37:58.000+01:00
Rename RungeKutta(Field)Integrator
diff --git a/hipparchus-core/src/test/java/org/hipparchus/analysis/differentiation/FieldGradientTest.java b/hipparchus-core/src/test/java/org/hipparchus/analysis/differentiation/FieldGradientTest.java
@@ -33,7 +33,7 @@ void testStackVariable() {
         // THEN
         Assertions.assertEquals(gradient.getValue(), gradientWithMoreVariable.getValue());
         Assertions.assertEquals(gradient.getFreeParameters() + 1, gradientWithMoreVariable.getFreeParameters());
-        Assertions.assertEquals(0., gradientWithMoreVariable.getGradient[gradient.getFreeParameters().getReal()]);
+        Assertions.assertEquals(0., gradientWithMoreVariable.getGradient()[gradient.getFreeParameters()].getReal());
         Assertions.assertArrayEquals(gradient.getGradient(), Arrays.copyOfRange(gradientWithMoreVariable.getGradient(),
                 0, gradient.getFreeParameters()));
     }
diff --git a/hipparchus-core/src/test/java/org/hipparchus/analysis/differentiation/GradientTest.java b/hipparchus-core/src/test/java/org/hipparchus/analysis/differentiation/GradientTest.java
@@ -103,7 +103,7 @@ void testStackVariable() {
         // THEN
         Assertions.assertEquals(gradient.getValue(), gradientWithMoreVariable.getValue());
         Assertions.assertEquals(gradient.getFreeParameters() + 1, gradientWithMoreVariable.getFreeParameters());
-        Assertions.assertEquals(0., gradientWithMoreVariable.getGradient[gradient.getFreeParameters()]);
+        Assertions.assertEquals(0., gradientWithMoreVariable.getGradient()[gradient.getFreeParameters()]);
         Assertions.assertArrayEquals(gradient.getGradient(), Arrays.copyOfRange(gradientWithMoreVariable.getGradient(),
                 0, gradient.getFreeParameters()));
     }
diff --git a/hipparchus-ode/src/changes/changes.xml b/hipparchus-ode/src/changes/changes.xml
@@ -48,19 +48,20 @@ If the output is not quite correct, check for invisible trailing spaces!
   <properties>
     <title>Hipparchus ODE Release Notes</title>
   </properties>
-  <release version="4.0" date="TBD" description="TBD">
-    <action dev="vincent" type="update" issue="issues/285">
-      Migrated tests from JUnit 4 to JUnit 5
-    </action>
-  </release>
   <body>
     <release version="4.0" date="TBD" description="TBD">
+      <action dev="serrof" type="update" issue="issues/372">
+        Rename RungeKutta(Field)Integrator as FixedStepRungeKutta(Field)Integrator.
+      </action>
       <action dev="serrof" type="update" issue="issues/361">
         Rename DEFAULT_MAXCHECK as DEFAULT_MAX_CHECK.
       </action>
       <action dev="serrof" type="add" issue="issues/335">
         Add boolean for propagation direction in (Field)AdaptableInterval.
       </action>
+      <action dev="vincent" type="update" issue="issues/285">
+        Migrated tests from JUnit 4 to JUnit 5
+      </action>
     </release>
     <release version="3.1" date="2024-04-05" description="This is a maintenance release. It includes one
                                                           bugfixes and adds two features on existing integrators.">
diff --git a/hipparchus-ode/src/conf/spotbugs-exclude-filter.xml b/hipparchus-ode/src/conf/spotbugs-exclude-filter.xml
@@ -113,7 +113,7 @@
     <Bug pattern="EI_EXPOSE_REP2" />
   </Match>
   <Match>
-    <Class name="org.hipparchus.ode.nonstiff.RungeKuttaFieldIntegrator"/>
+    <Class name="org.hipparchus.ode.nonstiff.FixedStepRungeKuttaFieldIntegrator"/>
     <Method name="getDefaultStep"/>
     <Bug pattern="EI_EXPOSE_REP" />
   </Match>
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/ButcherArrayProvider.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/ButcherArrayProvider.java
@@ -18,7 +18,7 @@
 package org.hipparchus.ode.nonstiff;
 
 /** This interface represents an integrator  based on Butcher arrays.
- * @see RungeKuttaIntegrator
+ * @see FixedStepRungeKuttaIntegrator
  * @see EmbeddedRungeKuttaIntegrator
  */
 public interface ButcherArrayProvider {
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/ClassicalRungeKuttaFieldIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/ClassicalRungeKuttaFieldIntegrator.java
@@ -53,7 +53,7 @@
  */
 
 public class ClassicalRungeKuttaFieldIntegrator<T extends CalculusFieldElement<T>>
-    extends RungeKuttaFieldIntegrator<T> {
+    extends FixedStepRungeKuttaFieldIntegrator<T> {
 
     /** Name of integration scheme. */
     public static final String METHOD_NAME = ClassicalRungeKuttaIntegrator.METHOD_NAME;
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/ClassicalRungeKuttaIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/ClassicalRungeKuttaIntegrator.java
@@ -43,7 +43,7 @@
  * @see LutherIntegrator
  */
 
-public class ClassicalRungeKuttaIntegrator extends RungeKuttaIntegrator {
+public class ClassicalRungeKuttaIntegrator extends FixedStepRungeKuttaIntegrator {
 
     /** Name of integration scheme. */
     public static final String METHOD_NAME = "classical Runge-Kutta";
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/EulerFieldIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/EulerFieldIntegrator.java
@@ -56,7 +56,7 @@
  * @param <T> the type of the field elements
  */
 
-public class EulerFieldIntegrator<T extends CalculusFieldElement<T>> extends RungeKuttaFieldIntegrator<T> {
+public class EulerFieldIntegrator<T extends CalculusFieldElement<T>> extends FixedStepRungeKuttaFieldIntegrator<T> {
 
     /** Name of integration scheme. */
     public static final String METHOD_NAME = EulerIntegrator.METHOD_NAME;
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/EulerIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/EulerIntegrator.java
@@ -47,7 +47,7 @@
  * @see LutherIntegrator
  */
 
-public class EulerIntegrator extends RungeKuttaIntegrator {
+public class EulerIntegrator extends FixedStepRungeKuttaIntegrator {
 
     /** Name of integration scheme. */
     public static final String METHOD_NAME = "Euler";
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/ExplicitRungeKuttaIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/ExplicitRungeKuttaIntegrator.java
@@ -40,7 +40,7 @@
  * </pre>
  *
  * @see ButcherArrayProvider
- * @see RungeKuttaIntegrator
+ * @see FixedStepRungeKuttaIntegrator
  * @see EmbeddedRungeKuttaIntegrator
  * @since 3.1
  */
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/FieldButcherArrayProvider.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/FieldButcherArrayProvider.java
@@ -25,7 +25,7 @@
 import org.hipparchus.CalculusFieldElement;
 
 /** This interface represents an integrator  based on Butcher arrays.
- * @see RungeKuttaFieldIntegrator
+ * @see FixedStepRungeKuttaFieldIntegrator
  * @see EmbeddedRungeKuttaFieldIntegrator
  * @param <T> the type of the field elements
  */
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/FieldExplicitRungeKuttaIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/FieldExplicitRungeKuttaIntegrator.java
@@ -43,7 +43,7 @@
  * </pre>
  *
  * @see FieldButcherArrayProvider
- * @see RungeKuttaFieldIntegrator
+ * @see FixedStepRungeKuttaFieldIntegrator
  * @see EmbeddedRungeKuttaFieldIntegrator
  * @param <T> the type of the field elements
  * @since 3.1
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/FixedStepRungeKuttaFieldIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/FixedStepRungeKuttaFieldIntegrator.java
@@ -57,7 +57,7 @@
  * @param <T> the type of the field elements
  */
 
-public abstract class RungeKuttaFieldIntegrator<T extends CalculusFieldElement<T>>
+public abstract class FixedStepRungeKuttaFieldIntegrator<T extends CalculusFieldElement<T>>
     extends AbstractFieldIntegrator<T> implements FieldExplicitRungeKuttaIntegrator<T> {
 
     /** Time steps from Butcher array (without the first zero). */
@@ -91,7 +91,7 @@ public abstract class RungeKuttaFieldIntegrator<T extends CalculusFieldElement<T
      * @param name name of the method
      * @param step integration step
      */
-    protected RungeKuttaFieldIntegrator(final Field<T> field, final String name, final T step) {
+    protected FixedStepRungeKuttaFieldIntegrator(final Field<T> field, final String name, final T step) {
         super(field, name);
         this.c    = getC();
         this.a    = getA();
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/FixedStepRungeKuttaIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/FixedStepRungeKuttaIntegrator.java
@@ -50,7 +50,8 @@
  * @see MidpointIntegrator
  */
 
-public abstract class RungeKuttaIntegrator extends AbstractIntegrator implements ExplicitRungeKuttaIntegrator {
+public abstract class FixedStepRungeKuttaIntegrator extends AbstractIntegrator
+        implements ExplicitRungeKuttaIntegrator {
 
     /** Time steps from Butcher array (without the first zero). */
     private final double[] c;
@@ -70,7 +71,7 @@ public abstract class RungeKuttaIntegrator extends AbstractIntegrator implements
      * @param name name of the method
      * @param step integration step
      */
-    protected RungeKuttaIntegrator(final String name, final double step) {
+    protected FixedStepRungeKuttaIntegrator(final String name, final double step) {
         super(name);
         this.c    = getC();
         this.a    = getA();
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/GillFieldIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/GillFieldIntegrator.java
@@ -54,7 +54,7 @@
  */
 
 public class GillFieldIntegrator<T extends CalculusFieldElement<T>>
-    extends RungeKuttaFieldIntegrator<T> {
+    extends FixedStepRungeKuttaFieldIntegrator<T> {
 
     /** Name of integration scheme. */
     public static final String METHOD_NAME = GillIntegrator.METHOD_NAME;
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/GillIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/GillIntegrator.java
@@ -45,7 +45,7 @@
  * @see LutherIntegrator
  */
 
-public class GillIntegrator extends RungeKuttaIntegrator {
+public class GillIntegrator extends FixedStepRungeKuttaIntegrator {
 
     /** Name of integration scheme. */
     public static final String METHOD_NAME = "Gill";
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/LutherFieldIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/LutherFieldIntegrator.java
@@ -63,7 +63,7 @@
  */
 
 public class LutherFieldIntegrator<T extends CalculusFieldElement<T>>
-    extends RungeKuttaFieldIntegrator<T> {
+    extends FixedStepRungeKuttaFieldIntegrator<T> {
 
     /** Name of integration scheme. */
     public static final String METHOD_NAME = LutherIntegrator.METHOD_NAME;
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/LutherIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/LutherIntegrator.java
@@ -54,7 +54,7 @@
  * @see ThreeEighthesIntegrator
  */
 
-public class LutherIntegrator extends RungeKuttaIntegrator {
+public class LutherIntegrator extends FixedStepRungeKuttaIntegrator {
 
     /** Name of integration scheme. */
     public static final String METHOD_NAME = "Luther";
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/MidpointFieldIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/MidpointFieldIntegrator.java
@@ -50,7 +50,7 @@
  * @param <T> the type of the field elements
  */
 
-public class MidpointFieldIntegrator<T extends CalculusFieldElement<T>> extends RungeKuttaFieldIntegrator<T> {
+public class MidpointFieldIntegrator<T extends CalculusFieldElement<T>> extends FixedStepRungeKuttaFieldIntegrator<T> {
 
     /** Name of integration scheme. */
     public static final String METHOD_NAME = MidpointIntegrator.METHOD_NAME;
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/MidpointIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/MidpointIntegrator.java
@@ -41,7 +41,7 @@
  *
  */
 
-public class MidpointIntegrator extends RungeKuttaIntegrator {
+public class MidpointIntegrator extends FixedStepRungeKuttaIntegrator {
 
     /** Name of integration scheme. */
     public static final String METHOD_NAME = "midpoint";
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/RungeKuttaFieldStateInterpolator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/RungeKuttaFieldStateInterpolator.java
@@ -32,7 +32,7 @@
 /** This class represents an interpolator over the last step during an
  * ODE integration for Runge-Kutta and embedded Runge-Kutta integrators.
  *
- * @see RungeKuttaFieldIntegrator
+ * @see FixedStepRungeKuttaFieldIntegrator
  * @see EmbeddedRungeKuttaFieldIntegrator
  *
  * @param <T> the type of the field elements
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/RungeKuttaStateInterpolator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/RungeKuttaStateInterpolator.java
@@ -24,7 +24,7 @@
 /** This class represents an interpolator over the last step during an
  * ODE integration for Runge-Kutta and embedded Runge-Kutta integrators.
  *
- * @see RungeKuttaIntegrator
+ * @see FixedStepRungeKuttaIntegrator
  * @see EmbeddedRungeKuttaIntegrator
  *
  */
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/ThreeEighthesFieldIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/ThreeEighthesFieldIntegrator.java
@@ -52,7 +52,7 @@
  */
 
 public class ThreeEighthesFieldIntegrator<T extends CalculusFieldElement<T>>
-    extends RungeKuttaFieldIntegrator<T> {
+    extends FixedStepRungeKuttaFieldIntegrator<T> {
 
     /** Name of integration scheme. */
     public static final String METHOD_NAME = ThreeEighthesIntegrator.METHOD_NAME;
diff --git a/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/ThreeEighthesIntegrator.java b/hipparchus-ode/src/main/java/org/hipparchus/ode/nonstiff/ThreeEighthesIntegrator.java
@@ -42,7 +42,7 @@
  * @see LutherIntegrator
  */
 
-public class ThreeEighthesIntegrator extends RungeKuttaIntegrator {
+public class ThreeEighthesIntegrator extends FixedStepRungeKuttaIntegrator {
 
     /** Name of integration scheme. */
     public static final String METHOD_NAME = "3/8";
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/ClassicalRungeKuttaFieldIntegratorTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/ClassicalRungeKuttaFieldIntegratorTest.java
@@ -25,7 +25,7 @@
 
 class ClassicalRungeKuttaFieldIntegratorTest extends RungeKuttaFieldIntegratorAbstractTest {
 
-    protected <T extends CalculusFieldElement<T>> RungeKuttaFieldIntegrator<T>
+    protected <T extends CalculusFieldElement<T>> FixedStepRungeKuttaFieldIntegrator<T>
     createIntegrator(Field<T> field, T step) {
         return new ClassicalRungeKuttaFieldIntegrator<T>(field, step);
     }
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/ClassicalRungeKuttaIntegratorTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/ClassicalRungeKuttaIntegratorTest.java
@@ -21,7 +21,7 @@
 
 class ClassicalRungeKuttaIntegratorTest extends RungeKuttaIntegratorAbstractTest {
 
-    protected RungeKuttaIntegrator createIntegrator(double step) {
+    protected FixedStepRungeKuttaIntegrator createIntegrator(double step) {
         return new ClassicalRungeKuttaIntegrator(step);
     }
 
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/EulerFieldIntegratorTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/EulerFieldIntegratorTest.java
@@ -25,7 +25,7 @@
 
 class EulerFieldIntegratorTest extends RungeKuttaFieldIntegratorAbstractTest {
 
-    protected <T extends CalculusFieldElement<T>> RungeKuttaFieldIntegrator<T>
+    protected <T extends CalculusFieldElement<T>> FixedStepRungeKuttaFieldIntegrator<T>
     createIntegrator(Field<T> field, T step) {
         return new EulerFieldIntegrator<T>(field, step);
     }
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/EulerIntegratorTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/EulerIntegratorTest.java
@@ -21,7 +21,7 @@
 
 class EulerIntegratorTest extends RungeKuttaIntegratorAbstractTest {
 
-    protected RungeKuttaIntegrator createIntegrator(double step) {
+    protected FixedStepRungeKuttaIntegrator createIntegrator(double step) {
         return new EulerIntegrator(step);
     }
 
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/GillFieldIntegratorTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/GillFieldIntegratorTest.java
@@ -25,7 +25,7 @@
 
 class GillFieldIntegratorTest extends RungeKuttaFieldIntegratorAbstractTest {
 
-    protected <T extends CalculusFieldElement<T>> RungeKuttaFieldIntegrator<T>
+    protected <T extends CalculusFieldElement<T>> FixedStepRungeKuttaFieldIntegrator<T>
     createIntegrator(Field<T> field, T step) {
         return new GillFieldIntegrator<T>(field, step);
     }
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/GillIntegratorTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/GillIntegratorTest.java
@@ -21,7 +21,7 @@
 
 class GillIntegratorTest extends RungeKuttaIntegratorAbstractTest {
 
-    protected RungeKuttaIntegrator createIntegrator(double step) {
+    protected FixedStepRungeKuttaIntegrator createIntegrator(double step) {
         return new GillIntegrator(step);
     }
 
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/LutherFieldIntegratorTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/LutherFieldIntegratorTest.java
@@ -27,7 +27,7 @@
 
 class LutherFieldIntegratorTest extends RungeKuttaFieldIntegratorAbstractTest {
 
-    protected <T extends CalculusFieldElement<T>> RungeKuttaFieldIntegrator<T>
+    protected <T extends CalculusFieldElement<T>> FixedStepRungeKuttaFieldIntegrator<T>
     createIntegrator(Field<T> field, T step) {
         return new LutherFieldIntegrator<T>(field, step);
     }
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/LutherIntegratorTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/LutherIntegratorTest.java
@@ -21,7 +21,7 @@
 
 class LutherIntegratorTest extends RungeKuttaIntegratorAbstractTest {
 
-    protected RungeKuttaIntegrator createIntegrator(double step) {
+    protected FixedStepRungeKuttaIntegrator createIntegrator(double step) {
         return new LutherIntegrator(step);
     }
 
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/MidpointFieldIntegratorTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/MidpointFieldIntegratorTest.java
@@ -25,7 +25,7 @@
 
 class MidpointFieldIntegratorTest extends RungeKuttaFieldIntegratorAbstractTest {
 
-    protected <T extends CalculusFieldElement<T>> RungeKuttaFieldIntegrator<T>
+    protected <T extends CalculusFieldElement<T>> FixedStepRungeKuttaFieldIntegrator<T>
     createIntegrator(Field<T> field, T step) {
         return new MidpointFieldIntegrator<T>(field, step);
     }
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/MidpointIntegratorTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/MidpointIntegratorTest.java
@@ -21,7 +21,7 @@
 
 class MidpointIntegratorTest extends RungeKuttaIntegratorAbstractTest {
 
-    protected RungeKuttaIntegrator createIntegrator(double step) {
+    protected FixedStepRungeKuttaIntegrator createIntegrator(double step) {
         return new MidpointIntegrator(step);
     }
 
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/RungeKuttaFieldIntegratorAbstractTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/RungeKuttaFieldIntegratorAbstractTest.java
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/RungeKuttaIntegratorAbstractTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/RungeKuttaIntegratorAbstractTest.java
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/ThreeEighthesFieldIntegratorTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/ThreeEighthesFieldIntegratorTest.java
diff --git a/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/ThreeEighthesIntegratorTest.java b/hipparchus-ode/src/test/java/org/hipparchus/ode/nonstiff/ThreeEighthesIntegratorTest.java
diff --git a/src/changes/changes.xml b/src/changes/changes.xml

Original file line number	Diff line number	Diff line change
`@@ -33,7 +33,7 @@ void testStackVariable() {`
`33`	`33`	`// THEN`
`34`	`34`	`Assertions.assertEquals(gradient.getValue(), gradientWithMoreVariable.getValue());`
`35`	`35`	`Assertions.assertEquals(gradient.getFreeParameters() + 1, gradientWithMoreVariable.getFreeParameters());`
`36`		`- Assertions.assertEquals(0., gradientWithMoreVariable.getGradient[gradient.getFreeParameters().getReal()]);`
	`36`	`+ Assertions.assertEquals(0., gradientWithMoreVariable.getGradient()[gradient.getFreeParameters()].getReal());`
`37`	`37`	`Assertions.assertArrayEquals(gradient.getGradient(), Arrays.copyOfRange(gradientWithMoreVariable.getGradient(),`
`38`	`38`	`0, gradient.getFreeParameters()));`
`39`	`39`	`}`
Original file line number	Diff line number	Diff line change
`@@ -103,7 +103,7 @@ void testStackVariable() {`
`103`	`103`	`// THEN`
`104`	`104`	`Assertions.assertEquals(gradient.getValue(), gradientWithMoreVariable.getValue());`
`105`	`105`	`Assertions.assertEquals(gradient.getFreeParameters() + 1, gradientWithMoreVariable.getFreeParameters());`
`106`		`- Assertions.assertEquals(0., gradientWithMoreVariable.getGradient[gradient.getFreeParameters()]);`
	`106`	`+ Assertions.assertEquals(0., gradientWithMoreVariable.getGradient()[gradient.getFreeParameters()]);`
`107`	`107`	`Assertions.assertArrayEquals(gradient.getGradient(), Arrays.copyOfRange(gradientWithMoreVariable.getGradient(),`
`108`	`108`	`0, gradient.getFreeParameters()));`
`109`	`109`	`}`
Original file line number	Diff line number	Diff line change
`@@ -40,7 +40,7 @@`
`40`	`40`	`* </pre>`
`41`	`41`	`*`
`42`	`42`	`* @see ButcherArrayProvider`
`43`		`- * @see RungeKuttaIntegrator`
	`43`	`+ * @see FixedStepRungeKuttaIntegrator`
`44`	`44`	`* @see EmbeddedRungeKuttaIntegrator`
`45`	`45`	`* @since 3.1`
`46`	`46`	`*/`