Index out of bound error in Corba application

Question

I am trying to understand Java Code which gives an error on compiling that index out of bound. I am trying to figure out why it is giving this error but failed. Can anyone help me that why this code is giving index out of bound error?

try {
            ORB orb = ORB.init(args, null);
            POA rootpoa = POAHelper.narrow(orb
                    .resolve_initial_references("RootPOA"));
            rootpoa.the_POAManager().activate();

            ProfilerServant profilerServant = new ProfilerServant(args[4],
                    args[5].equals("true"));
            org.omg.CORBA.Object ref = rootpoa
                    .servant_to_reference(profilerServant);
            Profiler pref = ProfilerHelper.narrow(ref);

            org.omg.CORBA.Object objRef = orb
                    .resolve_initial_references("NameService");
            NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);

            String name = "Profiler";
            NameComponent path[] = ncRef.to_name(name);
            ncRef.rebind(path, pref);

            orb.run();
        }

        catch (Exception e) {
            System.err.println("ERROR: " + e.getMessage());
            e.printStackTrace(System.out);
        }
    }

Here is the ProfilerServant Class with the constructor

public class ProfilerServant extends ProfilerPOA {

boolean cacheEnabled;

ServerParser parser;
HashMap<String, Integer> songCache;
HashMap<String, User> userCache;

ProfilerServant(String fileName, boolean cacheEnabled) {
    this.cacheEnabled = cacheEnabled;
    parser = new ServerParser(fileName);
    songCache = new HashMap<String, Integer>();
    userCache = new HashMap<String, User>();
    init();
}

Answer 1

The entry point of a java application is the main method.

public static void main(String[] args){}

args is a String array of the command line arguments used to run the program.

Assume your main class is Program.java .

On the terminal or command prompt, compile the program with javac Program.java and run with java Program /filename true

The args array is: "java","Program","/filename","true"

Given ProfilerServant(String fileName, boolean cacheEnabled) , you can instantiate ProfilerServant as:

ProfilerServant profilerServant = new ProfilerServant(args[2],
                args[3].equals("true"));
//This turns to:
ProfilerServant profilerServant = new ProfilerServant("/filename",
                "true".equals("true"));

Attempting to access an index out of bounds of args will result in IndexOutOfBounds .

Answer 2

The code is passing args to profilerServant class constructor. make sure initialization of the values of args[4] and args[5] are correct. check the length of argument args[4].