<<<=== Unsafe / Safe ===>>>

+---------------+        +-------------------+
|  Java source  |   +--> |   Class loader    | --+
+---------------+   |    | Bytecode verifier |   |
        |           |    +-------------------+   |
        V           |             /              |
+---------------+   |                           V
| Java compiler |  Network        /    +-------------------+
+---------------+   |                 |      JVM/JIT      |
        |           |             /    +-------------------+
        V           |                           |
+---------------+   |             /              V
| Java bytecode | --+                 +-------------------+
+---------------+                 /    | Operating system  |
                                      +-------------------+
                                  /              |
                                                V
                                  /    +-------------------+
                                      |     Hardware      |
                                  /    +-------------------+

                    <<<=== Unsafe / Safe ===>>>