Java offers exception and errors. Errors are thrown by the virtual machine and we do not currently use them as we have no vm at all.
Exceptions can be devided into checked and unchecked exceptions. Checked exceptions must be caught by a calling method, which is ensured by the Java compiler. Unchecked exceptions, such as ArrayIndexOutOfBoundsException or NullPointerException, must be caught when initializing classes or when calling thread or task methods. Of course, you are free to catch such unchecked methods in your code already.

All unchecked Java exceptions must be caught by the system. In such a case, an string is written to the System.err stream. Make sure, that you have directed this stream to an existing serial interface.

  SCI1.start(9600, SCI1.NO_PARITY, (short)8);
  System.out = new PrintStream(SCI1.out);
  System.err = System.out

  UART3.start(9600, UART3.NO_PARITY, (short)8);
  System.out = new PrintStream(UART3.out);
  System.err = System.out

On the NTB MPC555 Headerboard there is a single LED. On the Freescale MPC5200 module there is no LED, but we use the one on the carrier board (at pin Gpio_Wkup_7).