[commons-math] branch master updated: Simplify null checks.

[erans]

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erans pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/commons-math.git


The following commit(s) were added to refs/heads/master by this push:
     new a0cd950  Simplify null checks.
a0cd950 is described below

commit a0cd950a7caebd2e7e0a271ef235c5dd880c8c0f
Author: Gilles Sadowski <gillese...@gmail.com>
AuthorDate: Sat Aug 14 16:18:36 2021 +0200

    Simplify null checks.
---
 .../optim/nonlinear/scalar/noderiv/SimplexOptimizer.java   | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git 
a/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizer.java
 
b/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizer.java
index 0d310b9..0373ae4 100644
--- 
a/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizer.java
+++ 
b/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizer.java
@@ -21,6 +21,7 @@ import java.util.List;
 import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.Collections;
+import java.util.Objects;
 import java.util.function.UnaryOperator;
 import java.util.function.IntSupplier;
 import java.util.concurrent.CopyOnWriteArrayList;
@@ -159,9 +160,7 @@ public class SimplexOptimizer extends MultivariateOptimizer 
{
      * @param cb Callback.
      */
     public void addObserver(Observer cb) {
-        if (cb == null) {
-            throw new NullPointerException("Callback");
-        }
+        Objects.requireNonNull(cb, "Callback");
         callbacks.add(cb);
     }
 
@@ -338,12 +337,9 @@ public class SimplexOptimizer extends 
MultivariateOptimizer {
      * was passed to the {@link #optimize(OptimizationData[]) optimize} method.
      */
     private void checkParameters() {
-        if (updateRule == null) {
-            throw new NullPointerException("No update rule");
-        }
-        if (initialSimplex == null) {
-            throw new NullPointerException("No initial simplex");
-        }
+        Objects.requireNonNull(updateRule, "Update rule");
+        Objects.requireNonNull(initialSimplex, "Initial simplex");
+
         if (getLowerBound() != null ||
             getUpperBound() != null) {
             throw new 
MathUnsupportedOperationException(LocalizedFormats.CONSTRAINT);