From 1c8bc7132d980c1ff2dbd6b9af579c3b2fd8c63e Mon Sep 17 00:00:00 2001
From: bculkin2442 <bjculkin@mix.wvu.edu>
Date: Sun, 3 Apr 2016 19:22:48 -0400
Subject: General code refactoring and maintenance

---
 BJC-Utils2/src/main/java/bjc/utils/gui/SimpleJList.java | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'BJC-Utils2/src/main/java/bjc/utils/gui/SimpleJList.java')

diff --git a/BJC-Utils2/src/main/java/bjc/utils/gui/SimpleJList.java b/BJC-Utils2/src/main/java/bjc/utils/gui/SimpleJList.java
index 4695318..4db5027 100644
--- a/BJC-Utils2/src/main/java/bjc/utils/gui/SimpleJList.java
+++ b/BJC-Utils2/src/main/java/bjc/utils/gui/SimpleJList.java
@@ -22,6 +22,10 @@ public class SimpleJList {
 	 * @return A JList populated with the elements from ls.
 	 */
 	public static <E> JList<E> buildFromList(Iterable<E> listSource) {
+		if (listSource == null) {
+			throw new NullPointerException("Source must not be null");
+		}
+
 		return new JList<>(buildModel(listSource));
 	}
 
@@ -36,6 +40,10 @@ public class SimpleJList {
 	 * @return A list model populated with the elements from ls.
 	 */
 	public static <E> ListModel<E> buildModel(Iterable<E> listSource) {
+		if (listSource == null) {
+			throw new NullPointerException("Source must not be null");
+		}
+
 		DefaultListModel<E> defaultModel = new DefaultListModel<>();
 
 		listSource.forEach(defaultModel::addElement);
-- 
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