New java-compiler for the online-ide

This compiler/interpreter combo (work in progress...) understands a fairly large subset of the java programming language and transpiles it into individual javascript functions. These can then be executed step by step inside a browser. The compiler is a replacement for the old one that is currently integrated in the online-ide. The main difference is that it understands a significantly larger subset of the Java Programming Language and that there is no more intermediate language (P-Code) needed. Initial tests indicate that the new compiler/interpreter combo executes java code about 50 times faster than the old one.

Features (done)

• primitive types (int, long, double, ...)
• classes, interfaces, enums, arrays
• classes String, Math
• for, while, if...else
• break, continue
• switch statement
• simplified for-loop over collections
• class ArrayList
• try...catch...finally (exceptions) (new!)
• generics(new: with wildcard-operator and generic methods)
• named inner classes (new!)
• anonymous classes (new!)
• lambda functions (new!)
• function declarations in main program (new!)
• class Thread/multithreaded execution (new!)
• locking, wait, notify (new!)
• synchronized methods/blocks (new!)
• semaphors (not yet tested) (new!)
• rich semantic support for editing sourcecode in the monaco editor
• REPL-mode

Features (in progress)

• port whole Onlne-IDE API to new compiler (30 %)
• records