"Terminal" opens on its own after starting my MBP

Question

First of all, I'd like to apologize for my english...
I have a problem since 2 weeks ago. Everytime I start my mac, a Terminal's window opens on its own, and the next sequence of commands starts to execute in themselves:
Last login: Mon Jun 8 00:18:46 on console
/System/Library/Frameworks/JavaVM.framework/Versions/A/Commands/java ; exit;
MBP:~ miguelgonzalezherranz$ /System/Library/Frameworks/JavaVM.framework/Versions/A/Commands/java ; exit;
Usage: java [-options] class [args...]
(to execute a class)
or java [-options] -jar jarfile [args...]
(to execute a jar file)
where options include:
-d32 use a 32-bit data model if available
-d64 use a 64-bit data model if available (implies -server, only for x86_64)
-client to select the "client" VM
-server to select the "server" VM
-jvm is a synonym for the "client" VM [deprecated]
-hotspot is a synonym for the "client" VM [deprecated]
The default VM is client.
-cp <class search path of directories and zip/jar files>
-classpath <class search path of directories and zip/jar files>
A : separated list of directories, JAR archives,
and ZIP archives to search for class files.
-D<name>=<value>
set a system property
-verbose[:class|gc|jni]
enable verbose output
-version print product version and exit
-version:<value>
require the specified version to run
-showversion print product version and continue
-jre-restrict-search | -jre-no-restrict-search
include/exclude user private JREs in the version search
-? -help print this help message
-X print help on non-standard options
-ea[:<packagename>...|:<classname>]
-enableassertions[:<packagename>...|:<classname>]
enable assertions
-da[:<packagename>...|:<classname>]
-disableassertions[:<packagename>...|:<classname>]
disable assertions
-esa | -enablesystemassertions
enable system assertions
-dsa | -disablesystemassertions
disable system assertions
-agentlib:<libname>[=<options>]
load native agent library <libname>, e.g. -agentlib:hprof
see also, -agentlib:jdwp=help and -agentlib:hprof=help
-agentpath:<pathname>[=<options>]
load native agent library by full pathname
-javaagent:<jarpath>[=<options>]
load Java programming language agent, see java.lang.instrument
logout
[Proceso completado]
I've no idea of the cause of this problem, but i'm really scared about the possibility of being a virus, so I'd be very grateful if you give a hand with it.
Thank you very much

Answer 1

Hello MIke:
Welcome to Apple discussions.
No need to apologize. My English, at times, is not very good and it is my native tongue!
First, there are NO viruses that affect a Mac running OS X - none.
Open system preferences>accounts>log in items. See if "terminal" appears there (probably not).
I suspect this article will help yoiu solve the problem:
http://support.apple.com/kb/TS2304
Barry