KeyNames: partial revert of 1031e03d which broke Lemur

jme3-core/src/main/java/com/jme3/input/KeyNames.java

@@ -33,6 +33,15 @@ package com.jme3.input;
 
 import static com.jme3.input.KeyInput.*;
 
+/**
+ * Translate key codes (from {@link KeyInput}) to descriptive names.
+ *
+ * This class has no static methods, yet it can be instantiated. Here's why:
+ *
+ * It used to be that there was no static getName() method, so the only way to
+ * get names was to instantiate a KeyNames. As a consequence, we have
+ * applications and libraries that rely on being able to instantiate this class.
+ */
 public class KeyNames {
 
     private static final String[] KEY_NAMES = new String[0xFF];
@@ -180,12 +189,6 @@ public class KeyNames {
         KEY_NAMES[KEY_UNLABELED] = "Unlabeled";
     }
 
-    /**
-     * A private constructor to inhibit instantiation of this class.
-     */
-    private KeyNames() {
-    }
-
     public static String getName(int keyId) {
         return KEY_NAMES[keyId];
     }