Oberon-2 debugging example for Java

Canterbury Oberon-2 for Java supports any Java debugger. The following switches for debugger support are available in this Oberon-2 compiler:

-D

This switch causes the Oberon-2 compiler to call JAVAC or JIKES with the -g option. Th resulting byte code is created with debug information.

-L

This switch causes the Oberon-2 compiler to insert Oberon-2 source lines as comments into the Java output.

-JAVAC

This switch causes Oberon-2 to automatically run JAVAC (part of JDK) in a subprocess using the -g option. This generates the final Java byte code with all the needed debug information. It is also possible to invoke JAVAC (with the -g option) separately from a command line, after the Oberon-2 compilation has been completed.

-JIKES

This switch causes Oberon-2 to automatically run Jikes (available from Sourceforge) in a subprocess using the -g option. This generates the final Java byte code with all the needed debug information. It is also possible to invoke Jikes (with the -g option) separately from a command line, after the Oberon-2 compilation has been completed.

Java Application example for Win32 J2SE 1.4.x:

Given the following Oberon-2 module helloworld.obn:

MODULE helloworld;                      IMPORT Out; BEGIN   Out.String( "Hello World" );   Out.Ln; END helloworld.

The following commands are needed for compiling and debugging:

java mhc.obn helloworld -m -d -l -javac jdb helloworld

The following commands do the same:

java mhc.obn helloworld -m -l           javac helloworld.java -g jdb helloworld

Java Applet example for Win32 J2SE 1.4.x:

Given the Slides.obn file (see Oberon-2 example), the following commands can be used for compiling and debugging the applet:

java mhc.obn Slides -m -d -l -javac jdb sun.applet.AppletViewer Slides.html

The following commands do the same:

java mhc.obn Slides -m -l javac Slides.java -g jdb sun.applet.AppletViewer Slides.html