Load Java Program AT STartup

Hi I need to want to load a java program on startup and I don't know how. Is it possible to have a script that tells the operating system to load it on startup or can it only be done through the operating system's settings?

On Windows you put a batch file in your startup that contains: javaw <myapp name> or edit your registry settings to achive the same result. On Linux and Unix derivatives there are also startup files you can edit and put entries in to achive that result.

Similar Messages

Running a Java program at startup in Linux

Hello
How do I run a Java program at startup in Linux? I know in Windows I can put a .bat file in C:\Windows\Start Menu\Programs\StartUp\ directory, but in Linux I have no idea how it is done.
Thank you,
Mihai

This is really a Linux question, not Java.
And then it depends on the version of Linux you are using.
Maybe this will help, otherwise you should try on a forum for your version of Linux.

Error while loading java program using loadjava

Hi
I have oracle 8.1.7 in NT server. When I try to load a java program with load java it gives me the error like this
Error while resolving class EchoInput
ORA-00904: invalid column name
loadjava: 1 errors
Why this is happening. How can I resolve this. Any help is appreciated
Thanks
Santhosh

You need to install teh jserver component.
have your dba review this and run all java enabling scripts.
look for it in the doc as initjvm.sql.

Fast loading Java program

The book "Core Java, Volume I" by Horstmann and Cornell gives a hint for writing a Java program that loads quickly. They suggest that explicit references to other classes be eliminated from the main class, then use Class.forName to force the loading of the other classes.
I would like to see if the loading of other classes can be done on demand. Here is the schetch of my idea for instantiating and calling a method.
Class myClassObj = Class.forName("MyClass");
Object myObj = myClassObj.newInstance();
Constructor myConstr = myClassObj.getConstructor(new Class[] {String});
myConstr.invoke??
Method myMethod = myClassObj.getMethod("myMethod",new Class[]{String,int});
myMethod.invoke(myObj,new Obj []{"Julie",23});
Here are my questions:
1. I can use myClassObj.getConstructor to get a specific constructor but how would I invoke it? Does newInstance call a constructor already?
2. How would Invoke a static method?
3. If this approach is feasible, would you recomend it?
Thanks for your help.

1. I can use myClassObj.getConstructor to get a
specific constructor but how would I invoke it? Does
newInstance call a constructor already?The newInstance of Class calls the constructor with no arguments. To create an object using a Constructor instance, use its newInstance method.
2. How would Invoke a static method?The API documentation for the invoke() method of Method tells you that. It says "If the underlying method is static, then the specified obj argument is ignored. It may be null."
3. If this approach is feasible, would you recomend
it?Almost certainly not. If you simply replace explicit references to the class by calls to Class.forName(), you are still going to be loading the same classes at the same time. So I don't see how this would speed up loading. And I definitely wouldn't recommend putting all that reflection code in your program. First of all, it's slower, so you could negate whatever benefits you might have got at loading time, and second, it makes your program hard to write, difficult to maintain, and subject to run-time errors because you don't allow the compiler to check method names and signatures.
But if time to load the program is of much higher importance than any of those other considerations, then give it a try.

Running java program at windows startup

I need to run java program at startup and then it will continue to run in its own thread.
Any body having idea how to do that programmatically?
Zeeshan

This is one option but this is not feasible in my scenario as this application will be running over a network which involves hundreds of computer so is there any way to do it programatically?
I mean if I can load java class file through an exe file then I can load my class file in the startup using C++.
Any Suggestions.
thanks for the help
regards,
Zeeshan

How to run a java program in command prompt

hi i want to run a java program from in command prompt from another directory
i want to run a file named First in C:\Program Files\Java\jdk1.6.0_07\bin
so when i give the command
java "C:\Program Files\Java\jdk1.6.0_07\bin\First"
it doesnt works it shows
C:\>java "C:\Program Files\Java\jdk1.6.0_07\bin\First"
Exception in thread "main" java.lang.NoClassDefFoundError: C:\Program Files\Java
\jdk1/6/0_07\bin\First
Caused by: java.lang.ClassNotFoundException: C:\Program Files\Java\jdk1.6.0_07\b
in\First
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Could not find the main class: C:\Program Files\Java\jdk1.6.0_07\bin\First. Pro
gram will exit.

but it prints
C:\>java -cp "C:\Program Files\Java\jdk1.6.0_07\bin\" First
Usage: java [-options] class [args...]
(to execute a class)
or java [-options] -jar jarfile [args...]
(to execute a jar file)
where options include:
-client to select the "client" VM
-server to select the "server" VM
-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
-splash:<imagepath>
show splash screen with specified image
C:\>

Executing a java application during startup

{color:#0000ff}Hi
Can anybody help me how to execute a java program during startup?
Is there any java inbuilt codes to execute the program in startup?{color}

hi,
just create the java file and compile it in to .class file.
create a batch file (open notepad write these commands.
cd directory name where your java class is
java classname
then go to control panel and click on schedule tasks and schedule this .bat file at system startup.
it will run......

To run a java program on windows xp startup

hi ,
i have a sample HelloWorld.java program.
i wrote a batch file to run this program as follows:
set PATH=%PATH%;C:\Program Files\Java\jre1.6.0\bin;
cd c:\test
java HelloWorld
This program runs when i click on the bat file.
Next i add this batch file to registry to auto-start on windows startup
However, on windows startup, i get the following:
Exception in thread "main" java.lang.NoClassDefFoundError
Anyone can help me? Thank you in advance!

Hi Sergi,
Thanks for the info. I couldn't able to login because of my internet connection.
Thanks,
--Srini

Starting a java program on System boot/startup

Hi,
I am trying to find out how to start a java program on system startup which basically spawns a Thread which in turn does some processing.
Came across windows specific options which help one make it as a service.Making a .bat for windows and .sh for linux could be a option but not sure where to put these in respective OS or whether it is a good option.
If someone has tried out similar thing please let me know the details for the same.
Regards
Raj

[codes]
in command prompt
type edit startupor somename.bat
then type
cd C:\Program Files\Java\jdk1.5.0_01\bin
javac data1.java
java data1
and save
[codes]
copy startup.bat file
and click on start-->programs--> startup(rigthclick and open)
then paste that file into that folder...
now you ll get that file opened whenever system boots.
reply if this was usefull;)

Calling oracle SQL Loader from java program

Hi,
I want to insert data into oracle tables from a text files containing fixed length fields. I am using SQLLoader to achieve this. The requirement is to call the SQLLoader within the java program.
Does anyone know how to call SQL Loader from java program?
Thanks,
Varsha

Simply "exec" the sqlldr program with the parameters you need to pass to it.
Runtime.exec (........)
Try to pass all parameters needed including the username and password, and use the option "silent" to avoid output, and the option "log" to have a log file of the modifications that sqlldr has done to the database.

Once my Java program is loaded the it's reponse time is fine but how can I get it to load faster. It takes 10 to 15 seconds to load.

Is it related to iAS. Which java program are you loading. It depends on several issues right from your processor to the classloader.
Could you provide more details.
Thanks,
Rakesh.

Desktop java program: wait for page to load

We're using a macro-builder which records actions and re-executes them via a java program. Basically, the program is supposed to open IE, go to a page, enter a username and password, and click a link within the new page that comes up after login. The issue at hand is that the second page takes too long to load, and the recorded "click" in the macro occurs to soon. Is there any way to identify when the page has completed loading before the app continues?
Thanks,
Jonathan

Is there any way to identify when the page has
completed loading before the app continues?Not in Java. Probably not even in Visual Basic (I wrote some VB programs that attempted to do that sort of thing several years ago and they never worked properly).

How to put a startup picture in a java program?

Hi there,
I'm extremely new in Java programming and have a very weak knowledge in C programming. I managed to download a Java source file from the internet which I need to use for my school's project. I was wondering would it be possible for me to put a start up picture or video clip before the program runs? And if so, how do I go about doing it? Thanks in advance.
LostInJava

Requires the latest Java version, Java 6.And there are fairly simple ways to program your own splash screens in earlier versions.

Loading variables from JAVA PROGRAM

Hello, i have a java program how have on a variables that i want to put on a DataBase Oracle9i.
Help me

Hey, if you're the one that posted this: http://forum.java.sun.com/thread.jsp?forum=32&thread=495288 then you still owe me some..
You want environment vars to remain changed after your programme finished? Do you want them to remain changed in a new session (logout/login) ? Do you want them changed in both Systems equally (the mechanisms are equal but the syntax is different in DOS and Unix shells) ?
As I do not get tired to repeat: provide some information and the possibility of being helped is raised exponentially => explain what you try to do and people will try to help you.
-T-

JSP Unable to Load Class (posted in Java Programming for 5 Dukes)

I hope this isn't a violation of forum etiquette, but I posted my question in Java Programming at http://forum.java.sun.com/thread.jsp?forum=31&thread=203255
I realize now that it may have been wiser to post it here, but I have some replies already and it makes more sense just to inlcude the link.
Can anyone assist with the question at http://forum.java.sun.com/thread.jsp?forum=31&thread=203255
It's worth 5 dukes.

Try changing <tagclass>E:\Tomcat324\jakarta-tomcat-3.2.4\webapps\examples\WEB-INF\classes\tags.ExampleTag</tagclass> to <tagclass>tags.ExampleTag</tagclass>
because <tagclass> tag is for the class name and not the location of class file
And make sure your ExampleTag.class file is in
\WEB-INF\classes\tag\ExampleTag.class
B!

Load Java Program AT STartup

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