Update Filename_java.py

Author: garvit-joshi

For Linux/Filename_java.py

@@ -1,3 +1,21 @@
+'''
+	Java Executor-Executes Java files with simplicity
+    Copyright (C) 2020  Garvit Joshi
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+'''
 #GitHub Link:https://github.com/garvit-joshi/Java_Executor
 import glob, os
 import sys