[MATH-1224] NullPointerExceptions not documented in some classes

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.3, 3.5
• Fix Version/s: 4.0, 3.6
• Labels: documentation easyfix easytest newbie

Environment

Mac OS X, Java 6-8

• Assignee: Unassigned
• Reporter: Cyrille Artho
• Created: 11/May/15 00:43
• Updated: 25/Jan/16 20:27
• Resolved: 19/May/15 11:47

Description

In general, the need to initialize newly constructed objects with more data is now documented, but we have found two cases where a NullPointerException is thrown because of missing data.

The documentation should be updated to reflect this. This is similar to issues report in MATH-1116 but concerns classes that are not going to be deprecated (as far as we can tell).

I have previously posted this as a new comment on issue 1116, but that comment has not elicited any response. As the original issue is one year old, I post this bug as a new issue.

Below is the code that produces the two cases:

org.apache.commons.math3.ode.nonstiff.HighamHall54Integrator var1 = new org.apache.commons.math3.ode.nonstiff.HighamHall54Integrator(0.0d, 0.0d, 0.0d, 0.0d);
double[] var2 = new double[]

{ 0.0d }

;
var1.computeDerivatives(0.0d, var2, var2); // NPE

new org.apache.commons.math3.stat.correlation.SpearmansCorrelation().getCorrelationMatrix(); // NPE