Converter tests:

Change test data files extension to "java"

j2k/tests/testData/ast/class/ClassShadowing.java

@@ -0,0 +1,14 @@
+//file
+package test;
+
+public class Short {
+	public static Short valueOf(String value) {return new Short();}
+}
+
+class Test {
+	public static void test() {
+		Short.valueOf("1");
+		test.Short.valueOf("1");
+		java.lang.Short.valueOf("1");
+	}
+}