Micro Focus Visual COBOL 2.3 Update 1 for Eclipse (UNIX) > Programming > Using COBOL and Java Together > Setting Up the Environment for Native COBOL Applications > Java/COBOL Application Launcher > Using the Java/COBOL Application Launcher from the Command Line

Using the Java/COBOL Application Launcher from the Command Line

Restriction: This applies to native code only.

The command to invoke the Java/COBOL application launcher can take one of two formats:

cobjrun [options] class [arguments]
cobjrun -jar [options] jarfile [arguments]

where the parameters are:

options: The options you would normally specify to your Java application launcher.
class: The name of the class to be invoked. If the Java/COBOL application launcher cannot find a Java class of this name, it tries to find a COBOL program of the same name. If a COBOL program is found, it is executed.
arguments: The arguments to pass to the main function.
-jar: Specifies that a program from a JAR file is to be executed.
jarfile: The name of the Java archive (.jar) file to be invoked.

Important:

The Java/COBOL application launcher loads a specified class, and invokes the class's main method, where the method declaration must be in one of the following formats.
If the class is a Java class:
```
public static void main(String args[])
```
If the class is a COBOL class:
```
method-id main static.

procedure division using by value args as string occurs any.
```
If the Java application is contained in a .jar file, you need to add it to the classpath by using the -classpath (or -cp) option and specifying the fully qualified class-name
If you specify a .jar file that contains a manifest including a Main-Class attribute, you can use the -jar option to execute the application
In Eclipse, you set up a launch configuration and you specify cobjrun as the executable to run and specify that the multi-threaded run-time system is used
If you are calling a COBOL program, you cannot use the command_line_linkage tunable method to use the command line arguments in the COBOL program, but you can use the X/Open argument-name and argument-value syntax.
When using cobjrun in a 64-bit AIX environment, you must specify the locations of shared libraries using the LIBPATH environment variable, for example
```
export LIBPATH=/usr/java6_64/jre/lib/ppc64/j9vm:/usr/java6_64/jre/lib/ppc64:/usr/java6_64/jre/../lib/ppc64:
```
If you receive an Could not load JVM... error, check your environment settings, and also ensure your effective working mode (COBMODE) matches the version of Java shared libraries being called.
If the effective working mode is not set, you can directly invoke the correct environment by using either cobjrun32 or cobjrun64.

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