Let KeyCode.get(String) fall back to get(char)

This makes KeyCode.get(String) behave less surprisingly: e.g.,
KeyCode.get("a") now returns KeyCode.A instead of KeyCode.UNDEFINED.

Author: ctrueden

src/main/java/org/scijava/input/KeyCode.java

@@ -719,8 +719,10 @@ public static KeyCode get(final char c) {
 	 */
 	public static KeyCode get(final String name) {
 		final KeyCode keyCode = NAMES.get(name);
-		if (keyCode == null) return UNDEFINED;
-		return keyCode;
+		if (keyCode != null) return keyCode;
+		// Not a code name, but maybe a direct character value?
+		if (name.length() == 1) return KeyCode.get(name.charAt(0));
+		return UNDEFINED;
 	}
 
 }

src/test/java/org/scijava/input/KeyCodeTest.java

@@ -81,6 +81,11 @@ public void testGetString() {
 		assertEquals(KeyCode.A, KeyCode.get("A"));
 		assertEquals(KeyCode.Z, KeyCode.get("Z"));
 
+		// The next ones should fall back to get(char).
+		assertEquals(KeyCode.NUM0, KeyCode.get("0"));
+		assertEquals(KeyCode.A, KeyCode.get("a"));
+		assertEquals(KeyCode.Z, KeyCode.get("z"));
+
 		assertEquals(KeyCode.UNDEFINED, KeyCode.get("UNDEFINED"));
 		assertEquals(KeyCode.UNDEFINED, KeyCode.get(""));
 		assertEquals(KeyCode.UNDEFINED, KeyCode.get("aa"));