Compiling Realtime Java code for use with Ovm

Create your Hello World application, i.e. create a file HelloWorld.java with:

     public class HelloWorld {
             public static void main(String args[]) {
                     System.out.println("Hello, World");
             }
     }
     

Compile HelloWorld.java against the OVM runtime libraries:

     $ javac -target 1.1                                      \
             -bootclasspath OVM-JAR-DIR/ovm_rt_user.jar \
             HelloWorld.java
     

• If you built, but did not install ovm then OVM-JAR-DIR is: OVM-BIN-DIR/src/syslib/user.
• If you installed ovm, using make install then OVM-JAR-DIR is: OVM-INSTALL-DIR/ovm/classes.

NOTE: It is a current limitation with ovm that all .class files are generated with the format defined by the javac -target 1.1 option. Failure to do this may result in runtime exceptions, or crashes, due to missing fields or methods.