javatpoint.com
https://www.compiler.javatpoint.com/opr/test.jsp?f…
Compile Java File: CollectionsAddAllExample2 - Javatpoint
Compile Java File: CollectionsAddAllExample2, Free Online java compiler, Javatpoint provides tutorials and interview questions of all technology like java tutorial, android, java frameworks, javascript, ajax, core java, sql, python, php, c language etc. for beginners and professionals.
