From dd9e79a64e00a1c471a986a2844bc73b2bdba834 Mon Sep 17 00:00:00 2001
From: Amy DeGregorio <amy.m.degregorio@gmail.com>
Date: Mon, 24 Aug 2020 11:20:26 -0400
Subject: [PATCH] BAEL 4401 (#9913)

* BAEL-4401

* Update with master and resolve conflicts
---
 .../core-java-exceptions-3/pom.xml              |  3 +--
 .../NullParameterExample.java                   | 17 +++++++++++++++++
 .../NullParameterExampleUnitTest.java           | 17 +++++++++++++++++
 3 files changed, 35 insertions(+), 2 deletions(-)
 create mode 100644 core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/nullmethodparameter/NullParameterExample.java
 create mode 100644 core-java-modules/core-java-exceptions-3/src/test/java/com/baeldung/nullmethodparameter/NullParameterExampleUnitTest.java

diff --git a/core-java-modules/core-java-exceptions-3/pom.xml b/core-java-modules/core-java-exceptions-3/pom.xml
index 32c522dab5..b909572afe 100644
--- a/core-java-modules/core-java-exceptions-3/pom.xml
+++ b/core-java-modules/core-java-exceptions-3/pom.xml
@@ -30,5 +30,4 @@
         <!-- testing -->
         <assertj-core.version>3.10.0</assertj-core.version>
     </properties>
-
-</project>
\ No newline at end of file
+</project>
diff --git a/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/nullmethodparameter/NullParameterExample.java b/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/nullmethodparameter/NullParameterExample.java
new file mode 100644
index 0000000000..c2c76bdc46
--- /dev/null
+++ b/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/nullmethodparameter/NullParameterExample.java
@@ -0,0 +1,17 @@
+package com.baeldung.nullmethodparameter;
+
+public class NullParameterExample {
+    public void processSomethingNotNull(Object myParameter) {
+        if (myParameter == null) {
+            throw new IllegalArgumentException("Parameter 'myParameter' cannot be null");
+        }
+        //Do something with the parameter
+    }
+    
+    public void processSomethingElseNotNull(Object myParameter) {
+        if (myParameter == null) {
+            throw new NullPointerException("Parameter 'myParameter' cannot be null");
+        }
+        //Do something with the parameter
+    }
+}
diff --git a/core-java-modules/core-java-exceptions-3/src/test/java/com/baeldung/nullmethodparameter/NullParameterExampleUnitTest.java b/core-java-modules/core-java-exceptions-3/src/test/java/com/baeldung/nullmethodparameter/NullParameterExampleUnitTest.java
new file mode 100644
index 0000000000..aa4b332e52
--- /dev/null
+++ b/core-java-modules/core-java-exceptions-3/src/test/java/com/baeldung/nullmethodparameter/NullParameterExampleUnitTest.java
@@ -0,0 +1,17 @@
+package com.baeldung.nullmethodparameter;
+
+import org.junit.Test;
+
+public class NullParameterExampleUnitTest {
+    @Test(expected = IllegalArgumentException.class)
+    public void givenNullParameter_whenProcessSomethingNotNull_thenIllegalArgumentException() {
+        NullParameterExample example = new NullParameterExample();
+        example.processSomethingNotNull(null);
+    }
+    
+    @Test(expected = NullPointerException.class)
+    public void givenNullParameter_whenProcessSomethingElseNotNull_thenNullPointerException() {
+        NullParameterExample example = new NullParameterExample();
+        example.processSomethingElseNotNull(null);
+    }
+}