Last Modified on
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Download ...
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Download the compressed file from
Download Page.
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Extract ...
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Extracts the package from the compressed file.
*.tar.gz
You can use GNU version of tar command tool or combination
of gunzip and tar command tools.
In shell environment,
% tar -zxvf OpenJava_19991124.tar.gz
or
% gunzip -c OpenJava_19991124.tar.gz | tar -xv
*.jar
You can use jar command tool included in Sun's JDK
package to extract files form this compressed file.
We suppose you can do that with any other zip tools.
In Windows DOS-prompt,
C:\> jar -xvf OpenJava_19991124.jar
You can put the OJ directory anywhere you like.
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Class Path ...
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Setting up the class path.
Extracts the package from the compressed file.
- Use the ojc shell-script in bin directory. The script requires
/usr/bin/ksh .
- Set
CLASSPATH environment variable to include
the OJ directory, the directory in which the "openjava" directory
exists.
Do not forget to include paths to your classes in the class path.
One of the paths is often the current directory, '. '.
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Run ...
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Some Windows version of JDK have a problem in running OJ
compiler.
Try to turn off the JIT in this case.
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Java Compiler ...
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If you want to use any special regular Java compiler, try to
implement a class with the interface
openjava.ojc.JavaCompiler and specify that class as a
-compiler command option of ojc. For example with
JP.ac.tsukuba.openjava.NullCompiler , which is a compiler
doing nothing, you can use this special compiler by:
ojc -compiler=JP.ac.tsukuba.openjava.NullCompiler ...
JP.ac.tsukuba.openjava.SunJavaCompiler is the default
class to be used by the system for compiling regular Java source
code to generate byte code.
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Separated Metaclass Binding ...
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In OJ, a class without specification of its metaclass are to
be an instance of the default metaclass
openjava.mop.OJClass . In the case to change the default
class for certain classes, you can specify that in a separated file.
For instance, to make the classes Hello and
Bye instances of the metaclass VerboseClass ,
you should write a file MyBinding of the following content:
VerboseClass Hello
VerboseClass Bye
Note that any class name in the file must be qualified name.
Then, with the command option of ojc,
ojc ---default-meta=MyBinding Hello.oj Bye.oj
the metaclass for each class would be the VerboseClass
if its metaclass specification were omitted.
As it is an on-going work, either the format of separeted specification
files or the way of giving command line option may change.
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