The ParameterList() class in com.microfocus.cobol.lang helps with coding parameters being passed between Java and COBOL.
The general mechanism for using ParameterList() is:
   RuntimeSystem.cobcall("myProgram", 
    new ParameterList()
        .add(myOneInt,RuntimeSystem.BY_VALUE)
        .add(mySecondParameter,RuntimeSystem.BY_REFERENCE)
	       .add(99)		// 99 by reference
	       );
 
            	 Where the parameters are: