we made the integral work

.classpath

@@ -1,21 +1,21 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<classpath>
-	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
-	<classpathentry kind="lib" path="lib/commons-lang3-3.1.jar"/>
-	<classpathentry kind="lib" path="lib/commons-math3-3.0.jar"/>
-	<classpathentry kind="lib" path="lib/j3daudio.jar"/>
-	<classpathentry kind="lib" path="lib/j3dcore.jar"/>
-	<classpathentry kind="lib" path="lib/j3dtree.jar"/>
-	<classpathentry kind="lib" path="lib/j3dutils.jar"/>
-	<classpathentry kind="lib" path="lib/jdatepicker-1.3.2.jar"/>
-	<classpathentry kind="lib" path="lib/jgoodies-common-1.3.0.jar"/>
-	<classpathentry kind="lib" path="lib/jgoodies-forms-1.5.0.jar"/>
-	<classpathentry kind="lib" path="lib/jmi.jar"/>
-	<classpathentry kind="lib" path="lib/junit-4.3.1.jar"/>
-	<classpathentry kind="lib" path="lib/opencsv-2.3.jar"/>
-	<classpathentry kind="lib" path="lib/plot.jar"/>
-	<classpathentry kind="lib" path="lib/StarfireExt.jar"/>
-	<classpathentry kind="lib" path="lib/vecmath.jar"/>
-	<classpathentry kind="output" path="bin"/>
-</classpath>
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
+	<classpathentry kind="lib" path="lib/commons-lang3-3.1.jar"/>
+	<classpathentry kind="lib" path="lib/commons-math3-3.0.jar" sourcepath="lib/commons-math3-3.0.jar"/>
+	<classpathentry kind="lib" path="lib/j3daudio.jar"/>
+	<classpathentry kind="lib" path="lib/j3dcore.jar"/>
+	<classpathentry kind="lib" path="lib/j3dtree.jar"/>
+	<classpathentry kind="lib" path="lib/j3dutils.jar"/>
+	<classpathentry kind="lib" path="lib/jdatepicker-1.3.2.jar"/>
+	<classpathentry kind="lib" path="lib/jgoodies-common-1.3.0.jar"/>
+	<classpathentry kind="lib" path="lib/jgoodies-forms-1.5.0.jar"/>
+	<classpathentry kind="lib" path="lib/jmi.jar"/>
+	<classpathentry kind="lib" path="lib/junit-4.3.1.jar"/>
+	<classpathentry kind="lib" path="lib/opencsv-2.3.jar"/>
+	<classpathentry kind="lib" path="lib/plot.jar"/>
+	<classpathentry kind="lib" path="lib/StarfireExt.jar"/>
+	<classpathentry kind="lib" path="lib/vecmath.jar"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

src/jat/examples/ThreeBodyExample/ThreeBodyAPL.java

@@ -38,7 +38,11 @@ public class ThreeBodyAPL extends ThreeBody implements FirstOrderDifferentialEqu
 	@Override
 	public void computeDerivatives(double t, double[] y, double[] yDot) {
 		// returns the derivatives of the ThreeBody problem
-		yDot = this.derivs(t, y);
+		double [] yDot_temp = this.derivs(t, y);
+		for (int i=0; i<yDot_temp.length; i++)
+		{
+			yDot[i] = yDot_temp[i];
+		}
 	}
 
 	@Override

src/jat/examples/ThreeBodyExample/ThreeBodyExample.java

@@ -110,7 +110,7 @@ public class ThreeBodyExample {
 		// l.draw_dot = true;
 		p.addPlot(s);
 		p.setLegendOrientation(PlotPanel.SOUTH);
-		double plotSize = 10000.;
+		double plotSize = 60000.;
 		double[] min = { -plotSize, -plotSize };
 		double[] max = { plotSize, plotSize };