diff --git a/sdk/jme3-materialeditor/src/com/jme3/gde/materials/MaterialBrowser.java b/sdk/jme3-materialeditor/src/com/jme3/gde/materials/MaterialBrowser.java
index 076f9c242..f25294d8c 100644
--- a/sdk/jme3-materialeditor/src/com/jme3/gde/materials/MaterialBrowser.java
+++ b/sdk/jme3-materialeditor/src/com/jme3/gde/materials/MaterialBrowser.java
@@ -18,6 +18,9 @@ import java.awt.event.WindowEvent;
 import java.awt.event.WindowListener;
 import java.io.FileReader;
 import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
 import java.util.logging.Logger;
 import javax.swing.event.TreeSelectionEvent;
 import javax.swing.event.TreeSelectionListener;
@@ -50,7 +53,9 @@ public class MaterialBrowser extends javax.swing.JDialog implements TreeSelectio
             return;
         }
         String[] leaves = assetManager.getMaterials();
-        TreeUtil.createTree(jTree1, leaves);
+        List<String> leavesList = Arrays.asList(leaves);
+        Collections.sort(leavesList);
+        TreeUtil.createTree(jTree1, leavesList.toArray(new String[0]));
         TreeUtil.expandTree(jTree1, (TreeNode) jTree1.getModel().getRoot(), 1);
         jTree1.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
         jTree1.addTreeSelectionListener(this);
diff --git a/sdk/jme3-materialeditor/src/com/jme3/gde/materials/multiview/MaterialEditorTopComponent.java b/sdk/jme3-materialeditor/src/com/jme3/gde/materials/multiview/MaterialEditorTopComponent.java
index e85107c64..154a6dfa2 100644
--- a/sdk/jme3-materialeditor/src/com/jme3/gde/materials/multiview/MaterialEditorTopComponent.java
+++ b/sdk/jme3-materialeditor/src/com/jme3/gde/materials/multiview/MaterialEditorTopComponent.java
@@ -21,6 +21,8 @@ import java.awt.Component;
 import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
 import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
@@ -523,14 +525,16 @@ public final class MaterialEditorTopComponent extends CloneableTopComponent impl
         }
     }
 
-    public void setMatDefList(final String[] strings, String selected) {
+    public void setMatDefList(final String[] matDefs, String selected) {
         EditableMaterialFile prop = materialFile;
         materialFile = null;
         jComboBox1.removeAllItems();
         jComboBox1.addItem("");
-
-        for (int i = 0; i < strings.length; i++) {
-            String string = strings[i];
+        List<String> matDefList = Arrays.asList(matDefs);
+        Collections.sort(matDefList);
+        String[] sortedMatDefs = matDefList.toArray(new String[0]);
+        for (int i = 0; i < sortedMatDefs.length; i++) {
+            String string = sortedMatDefs[i];
             jComboBox1.addItem(string);
         }