Writing command line arguments

Is there a way in java to specify which command line argument belongs to each option, like in Perl?
Like -name Sally -age 23 -city New York
Or would one have to write their own parsing function to do that?

You see a lot of quick and dirty initialization code that looks likeif (args.equals("-name")) {setName(args[i+1]);}Obviously the getopts people had to write one too many program with command line arguments.

Similar Messages

Need Help with command line arguments for a class method

Hey guys,
I'm fairly new to programming in java.
I want to a write a class method that adds up its command line arguments which are numbers. For example, if the input was .... 5 2 3....then the output would be 10.
I have been told to use the Convert to convert a string to a double. I'm ok for writing the class method but I have no idea how to use Convert and why I need it in the method.
Can anybody help please?

Hey guys,
I'm fairly new to programming in java.
I want to a write a class method that adds up its
command line arguments which are numbers. For
example, if the input was .... 5 2 3....then the
output would be 10.Okay. So you would receive the numbers to add as the String[] argument to a main method. The steps are simple:
1) declare a variable for the count
2) for each String in the array:
2.1) extract the value as a double
2.2) add this to the count
3) output the resulting count
I have been told to use the Convert to convert a
string to a double.
I'm ok for writing the class
method but I have no idea how to use ConvertThere is no class Convert in the Java API.
and why
I need it in the method. Do you understand you need to somehow convert each String to a double (step 2.1)? Since Convert is unknown to me, maybe you should just take a look at class Double. It can help you do step 2.1, the rest should be trivial enough.
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Double.html
Give it a go and feel free to post back with a specific problem you are having, accurately described if you please :-)

How to pass a command line argument to a jsp file...

Hi guys,
I'm writing a jsp file in which I have some java codes. I want to pass some command line arguments to that jsp file. In other words, I have some files located somewhere on my C drive and I want to pass the path to these files to my jsp file. How can it be done? I have never done before.
Any suggestion will be very hepful...
Thanks....

I dont know if I truly understand your problem...
For instance, when you place the url of your jsp you can add, at the end some parameters. For example:
http://myserver/myapp/myjsp.jsp?MyParameter=C:\Temp\JavaTutorial.html
In your JSP, you can place this code on a scriplet to get the value:
String path = request.getParameter("MyParameter");
Hope it helps.

Protecting command-line arguments from glob expansion

Hi. I am writing a java program and I want to pass it a regular expression as a command-line argument. However, when I use certain regular expressions (e.g. [a-z]*), the java command-line interpreter recognizes this a glob expression and replaces it with names of files from the current directory.
I am running the java interpreter from a Linux bash command line and I am enclosing the regular expression in single quotes (e.g. '[a-z]*') to protect it from the bash interpreter but the java interpreter is still getting to it. I have read other posts which stated that the java interpreter doesn't do this and that it must be the operating system's command-line interpreter that is doing it but I am sure this not the case.
Can anyone help? Thank you. Eli

I am running the java interpreter from a Linux bash
command line and I am enclosing the regular
expression in single quotes (e.g. '[a-z]*') to
protect it from the bash interpreter but the java
interpreter is still getting to it. I have read other
posts which stated that the java interpreter doesn't
do this and that it must be the operating system's
command-line interpreter that is doing it but I am
sure this not the case.It most certainly is the case that it's the shell, not Java. If the VM receives the String [a-z]* then that will be one the args.
What may be happening is that java is actually a shell script, not an executable, and that shell script is expanding stuff.
Do this: $ type java You'll get something like java is /usr/local/bin/java Then do $ file /usr/local/bin/java or whatever comes back. (Or just try to view the file with a text editor.)
That file might be a shell script that sets some env vars and than calls the real java executable, passing it "$*" or "$@".
If that's the case, you can try just invoking the executable directly, or modifying that shell script so that it won't do the expansion.
If that's not the case, then post the exact command you're running and show your main method (includig code in the main that prints out each element of the args parameter).

Command line arguments with a Labview pda application

Hi Everyone,
I am in the process of writing some Labview code to run on a PDA that is called from another vendor's software. When called, I need to pass some information to it (in the form of an integer) and then return an error code when it has finished its task (again, as an integer).
Not being able to compile a my application as a labview dll for to run on a PDA with Windows Mobile 2003, I was hoping to be able to pass command line arguments to my program when compiled as an executable. This doesn't seem to be possible.
Could someone please confirm that Labview PDA applications do not support command line arguments?
Any suggestions on how to meet my objective would be most welcome .
Regards,
Mark

Paolo,
Thanks for your input: storing this information in a text file is a choice we are looking at. But it does leave us with the problem that the vendor's software will not necessarily know when our program has finished running, unless it continuously polls the file to see if there has been any update.
A dll would be ideal. I was hoping there might be a clever way of emulating this.
Regards,
Mark.

Help with char and command line arguments

I am writing a program that takes 2 command line arguments (such as 4 b, or 3 4, etc.). It uses the first argument to determine the height of a triangle (how many rows high), and the second is the character with which the triangle is drawn.
My problem is I tend to code backwards - go for the bigger part and then figure out the smaller things. So, I've written a program that prints out this triangle, BUT I can't figure out how to get the command line arguments into it properly. A number works fine because I can:
size = Integer.parseInt(args[0]);
but what do I do if the second argument is a character? Args is a String array (I've been fighting with it for the past 4 hours, so I KNOW its a String array) - so how can I get a char to be read as args[1]?
Here is my code before adding in the second argument (the char):
public class Triangle
public static final void main(String[] args)
int size;
if (args.length > 0)
try
size = Integer.parseInt(args[0]);
catch(NumberFormatException e)
System.out.println("Input Error");
createFilledTriangle(size);
System.out.println();
public static void createFilledTriangle(int size)
int i = 0;
int j = 0;
for(i = size, j = 1; i > 0; i--, j +=2)
printChar(" ", i);
printChar("*", j); <-----Instead of using * I want to use the second command line arg
System.out.println();
private static void printChar(String str, int total)
for(int i = 0, i < total; i++)
if(i%2 == 1)
System.out.print(str);
else
System.out.print(" ");
Thank you for any help in advance!

I was sure i send it the other day, i probably send it to the wron guy.
This will give you more idea about drawing.
import java.awt.*;
import java.awt.event.*;
public class Args extends Frame
     Panel panel = new Tpan();
     int   arg1;
     char arg2;
public Args(int a1, char a2)
     super();
     arg1 = a1;
     arg2 = a2;
     setBounds(1,1,600,400);
     setLayout(new BorderLayout());
     addWindowListener(new WindowAdapter()
     {     public void windowClosing(WindowEvent ev)
          {     dispose();
               System.exit(0);
     add("Center",panel);
     setVisible(true);
public class Tpan extends Panel
public Tpan()
public void paint(Graphics g)
     super.paint(g);
     g.setColor(Color.blue);
     g.drawLine(120,110-arg1,80,110);
     g.drawLine(120,110-arg1,160,110);
     g.drawLine(80,110,160,110);
     g.setColor(Color.red);
     g.drawLine(120,110-arg1,120,110);
     g.setColor(Color.black);
     g.drawString(""+arg2,116,110-arg1/2+10);
public static void main (String[] args) throws InterruptedException
// get the 2 arguments from the args insread of a1= , a2=
     int a1 = 60;
     char a2 = 'a';
     new Args(a1,a2);
Noah
import java.awt.*;
import java.awt.event.*;
public class Args extends Frame
     Panel panel = new Tpan();
     int arg1;
     char arg2;
public Args(int a1, char a2)
     super();
     arg1 = a1;
     arg2 = a2;
     setBounds(1,1,600,400);
     setLayout(new BorderLayout());
     addWindowListener(new WindowAdapter()
     {     public void windowClosing(WindowEvent ev)
          {     dispose();
               System.exit(0);
     add("Center",panel);
     setVisible(true);
public class Tpan extends Panel
public Tpan()
public void paint(Graphics g)
     super.paint(g);
     g.setColor(Color.blue);
     g.drawLine(120,110-arg1,80,110);
     g.drawLine(120,110-arg1,160,110);
     g.drawLine(80,110,160,110);
     g.setColor(Color.red);
     g.drawLine(120,110-arg1,120,110);
     g.setColor(Color.black);
     g.drawString(""+arg2,116,110-arg1/2+10);
public static void main (String[] args) throws InterruptedException
// get the 2 arguments from the args insread of a1= , a2=
     int a1 = 60;
     char a2 = 'a';
     new Args(a1,a2);

Error while running aiaconfig.sh - The command line argument(s) "weblogicConfig"

Hi.
We are Configuring PIP on AIA 11.1.1.7 after installing AIA PIP release. we we run ./aiaconfig.sh we are getting below error message,
$./aiaconfig.sh
Starting Oracle Universal Installer...
Checking swap space: must be greater than 500 MB.   Actual 169130 MB    Passed
Checking monitor: must be configured to display at least 256 colors.    Actual 16777216    Passed
Preparing to launch Oracle Universal Installer from /tmp/OraInstall2013-11-20_04-11-10AM. Please wait ...adevaia                                                        @soa-odi-dev1:/u02/app/Oracle/Middleware/AIAHOME/bin$ [WARN ][jrockit] MaxPermSize=256m ignored: Not a valid opt                                                        ion for JRockit
Log: /u01/app/oraInventory/logs/install2013-11-20_04-11-10AM.log
The command line argument(s) "weblogicConfig" or the install mode specified is not valid.
Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
Usage:
config.sh [-mode] [-options] [(<CommandLineVariable=Value>)*]
Where mode include:
[Mode is a mandatory parameter. Only one mode can be specified.]
     -silent For silent mode operations, the inputs can be a response file or a list of
              command line variable value pairs.
Where options include:
     -help, --help, --usage
              Displays above usage.
     -invPtrLoc <inventory pointer file>
              Launches the installer with a custom inventory location. The invPtrLoc
              should point to a file which contains the following information.
              inventory_loc=<inventory_location>
              inst_group=<group_name>
     -response, -responseFile <response file>
              Specifies the response file and path to use.
     -jreLoc <location>
              Path where Java Runtime Environment is installed. OUI cannot be run without
              it.
     -logLevel <level>
              To filter log messages that have a lesser priority level than <level>.
              Valid options are: severe, warning, info, config, fine, finer, finest,
              basic, general, detailed, trace. The use of basic, general, detailed, trace
              is deprecated.
     -debug For getting the debug information from OUI.
     -force Allowing silent mode installation into a non-empty directory.
     -printdiskusage
              Log debug information for disk usage.
     -printmemory
              Path where Java Runtime Environment is installed. OUI cannot be run without
              it.
     -printtime
              Log debug information for time usage.
     -waitforcompletion
              For windows. setup.exe will wait for completion instead of spawning the
              java engine and exiting.
     -noconsole
              For suppressing display of messages to console. Console is not allocated.
     -ignoreSysPrereqs
              For ignoring the results of the system pre-requisite checks.
     -executeSysPrereqs
              Execute system pre-requisite checks and exit.
     -paramFile <location of file>
              Specify location of oraparam.ini file to be used by OUI.
     -novalidation
              Disables the validations, can be invoked along with GUI or silent mode.
     -nodefaultinput
              Disables the default computation of values (pre-populating of values when
              screen is loaded) in GUI install.
     -nocheckForUpdates
              To disable all updates checking
     -updatesDir
              To specify the directory where latest updates are downloaded. This could be
              used in disconnected mode.
Command Line Variables Usage:
          Command line variables are specified using <name=value>; for example:
              [ session: | session:compName: | session:compName:version: ]variableName=" valueOfVariable"]
          Installer variables are specified using:
              varName=value
              Ex: ORACLE_HOME=<value>
          OUI Session variables are specified using:
              session:varName=value
              Ex: session:VARIABLE_NAME=<value>
          OUI Component variables are specified using:
              session:compInternalName:[Version:]varName
              Ex 1: session:oracle.comp1:1.0.1:varName=<value>
              Ex 2: session:oracle.comp1:varName=<value>
              The lookup order is compInternalName:Version:varName, then compInternalName:varName
do anyone had any idea on this.
Thanks a lot,
RR.

try checking relevant environment variables like the CLASSPATH.... a major source of failures in Windows is when in the classpath there is a path containing SPACES.... also enabling some "debug" or "verbose" flag (not sure how to do it) would provide more insight...

How to run command line argument programe

Hi guys, I am doing pass command line argument programe in java but I don't know how to run this programe. Path for this programe in my my computer is C:\Users\Desktop\Mainjava\mycode\CommandProgjava*
{code/}
public class CommandProg
public static void main(String[] args)
System.out.println("d");
for (int i = 0; i < args.length; i++)
System.out.println(args);
{code/}
Where i need to go and what command i need to give so i can execute this programe(I am using window vista). I only know i have to give
this command some where CommandProg arg1 arg2 arg3 arg4. Output should be
Output:
arg1
arg2
arg3
arg4
Please help me, Thanks in advance.
Edited by: JayVirk on Dec 30, 2007 11:33 AM

Jay,
Your question isn't very clear, hence Joerg's well meaning but irrelevant advise.
Do you mean:
I've written a simple program in java which echos
it's command-line arguments to back to the console.
Here's my code:
package forums;
public class ArgsEchoer
public static void main(String[] args) {
for (String arg : args) {
System.out.println(arg);
But can't figure out how to compile and run the program.
I'm using winblows shista, and it's cr@p.
Please help me, Thanks in advance.So... where are you at? Have you installed the JDK (java development kit)? Which version? Is your path set? Is your classpath set?
Start here: http://java.sun.com/developer/onlineTraining/new2java/

Error message: "invalid command line argument" while lodaing itunes

I'm trying to load Itunes onto a computer that already has a version of itunes on it. I get a message that says "error: -1639 invalid command line argument" Does anyone know what this means? Does this mean I can't load itunes onto a computer that already has itunes on it?
Also, I was able to load itunes on my laptop, but My ipod Icon is not appearing anywhere, not in itunes, not in explorer, not in my computer. I am, however, able to transfer music automatically when I plug the Ipod into the laptop. I have created several playlists and they have transferred over to the ipod as playlists. Any ideas why I can transfer despite not being recognized anywhere on the computer?
Last thing is, I have plugged the Ipod into three different computers with itunes on them, and the ipod does not show up in the source list.
I'm somewhat perplexed by all of this. Any help or insight would be greatly appreciated
Dell Windows XP Pro

hiya!
"error: -1639 invalid command line argument"
hmmm. folks typically only get that error if they are installing from removable media (such as a CD), although i have seen it happen if someone tries to install into the "recovery partition" of certain makes of PC.
if you download and save an installer to your C drive and run the install from there, do you still get the 1639?
iTunes 6.0.4.2 Installer
love, b

Sending varargs via command line arguments to main()

When I put A B C D in the command line arguments textbox in my compiler, the output is as expected: A B C D. However, when I put *new String[]{A, B, C, D}*, the output is *new String[]{A, B, C, D}*, not A B C D as I had expected. My code is below. Any suggestions?
package varargs;
public class Varargs {
    static void printArray(Object...args){
        for (Object obj : args)
            System.out.print(obj + " ");
        System.out.println();
    public static void main(String...args) {
        printArray((Object[])args);
}

The argument(s) that is/are supplied to your main method will be rendered as literal String constants. It looks like you are attempting to use java code as one of your arguments with the expectation that the program will interpret this code. It won't. Your program will simply display whatever it is given even if what you offer as an argument happens to be a construct of the Java language.

Sending Command Line Arguments to Jar Executable

Hi All
I wish to send Command Line Arguments to Jar Executable.
i.e. before I Jar'd my program, I would do the following
public class CmdLnArgmntExp {
public static void main(String[] args) {
System.out.println("d");
for (int i = 0; i < args.length; i++)
System.out.println(args);
Running the program in Console.
Java CmdLnArgmntExp arg1 arg2 arg3 arg4Output:
arg1
arg2
arg3
arg4
How would I do this to a Jar executable, hope that made sense
Thanks

java -jar executable-jar-file-containing-class-CmdLnArgmntExp.jar arg1 arg2 arg3 arg4

How to add command line arguments to shortcuts in the LV8.5.1 installer

I want to create multiple shortcuts to my LV program, each with different command line arguments.
I can do this manually.
I want the installer to generate these shortcuts.
I can add different shortcuts in de installer build specification, but I cannot add commandline arguments in the shortcuts.
Does anyone know how to do this?
Rindert

Hello Forum,
Does anyone have any better data for this? I would also like to create an installer using Labview Project Explorer tool (Build Specification->Installer), and I have a need to create some shortcuts to some EXE's (VS.NET built, not LV) which need to have some arguments passed. I just verified that LV8.6 still does not seem to offer the option of passing arguments when creating shortcuts. Is this correct? Creating stub EXE's or batch files isn't a good option for my project, so I'd like to have someone confirm if LV installer tool can't create shortcuts w/ arguments before I fire up InstallShield.
Regards!

Connection string not in the command line argument.

Hi,
I found myself constantly looking for the debug connection string and to enter it in the "Command line arguments". I decided to create my Add-On base class from which all my add-ons inherit from.
In the constructor of the base Add-On class I determine the connection string based on whether the code is in debug more or not.
Example:
string connectionString = string.Empty;
#if DEBUG
    _connectionString = "0030002C0030002C00530041005000420044005F00440061007400650076002C0050004C006F006D0056004900490056";
#else
    // Get the log info
    if (Environment.GetCommandLineArgs().Length > 1 )
        _connectionString = Environment.GetCommandLineArgs().GetValue(1).ToString();
#endif
I hope this help.
Edited by: B1Computing on Apr 5, 2011 8:20 PM

Hi,
I found myself constantly looking for the debug connection string and to enter it in the "Command line arguments". I decided to create my Add-On base class from which all my add-ons inherit from.
In the constructor of the base Add-On class I determine the connection string based on whether the code is in debug more or not.
Example:
string connectionString = string.Empty;
#if DEBUG
    _connectionString = "0030002C0030002C00530041005000420044005F00440061007400650076002C0050004C006F006D0056004900490056";
#else
    // Get the log info
    if (Environment.GetCommandLineArgs().Length > 1 )
        _connectionString = Environment.GetCommandLineArgs().GetValue(1).ToString();
#endif
I hope this help.
Edited by: B1Computing on Apr 5, 2011 8:20 PM

Problem associated with Command Line arguments

hi ,
I am not able to pass a file path as command line argument in java.
Actually i want to run a java program from the command prompt passing a file path . Something like this i tried to do , but its not working.
D:\VISHAL\src> java CopyFile C:\Documents and Settings\Administrator\Desktop\link.txt
where ,
CopyFile is the name of my class which i am going to run
C:\Documents and Settings\Administrator\Desktop\link.txt is the argument.
Can anyone tell me whether a java program accepts an argument like this, if yes please tell me the exact syntax..
Thanks
Vishal J
Message was edited by:
vishal_vj

is there any other way of solving this?Y don't U try it out with the logic as mentioned
below it wud be the case if U r not going with
java CopyFile "C:\Documents and
Settings\Administrator\Desktop\link.txt" 1
String filepath = new String();
for(int i = 0; i < Arg.length; i++)
filepath.append(Arg);
File f = new File(filepath);
What???? This is a non-solution to a non-problem. First of all, you would be constructing a filename without spaces, when the real path contains spaces. Secondly, even if you did insert spaces it would not matter. What if the String (and it does not have to be a filename) contained tabs rather than spaces. The real (and really only) solution to the problem is to put quotes around the argument, for the exact reason stated in my last post.

Read in file name + path using command line arguments

Hi guys,
I am trying to use command line arguments to read in the name of two files. The code below works as long as the files are on the class path.
public class cmdLineArguments {
     public static void main(String[] args) {
          String xmlFile1 = args[0];
                String xmlFile2 = args[1];
          System.out.println ("\nXmlFile1: " + args[0] + "\nXmlFile2: " + args[1]);
}I would like to be able to read files that are not on the class path as well by entering their full path along with their names.
In other words, It works if I type:
C:\Documents and Settings\user\workspace\CmdLineArgs\src>java cmdLineArgs file1.xml file2.xmlbut not if I type:
C:\Documents and Settings\user\workspace\CmdLineArgs\src>java cmdLineArgs c:\Documents and Settings\user\desktop\file1.xml c:\Documents and Settings\user\desktop\file2.xmlWould anyone please explain how I can edit the code to make it work? I guess I could take them both as a String, modify them manually (add a \ to it etc) but is there an easier way to do it? Even a reference to a tutorial, article etc about this would be very much appreciated.
Also, any idea why a code would compile and run fine in Eclipse but would create an error from command line?
Thanks a lot.

You need to learn about cmd.exe which is used to process the command line. The arguments passed to any program is the command line split at white space so your command line arguments of
c:\Documents and Settings\user\desktop\file1.xml c:\Documents and Settings\user\desktop\file2.xmlis turned into an array of
"c:\Documents", "and", "Settings\user\desktop\file1.xml", "c:\Documents", "and", "Settings\user\desktop\file2.xml"In other words instead of 2 arguments you actually have 6.
To get round this the file names need to be quoted
java cmdLineArgs "c:\Documents and Settings\user\desktop\file1.xml" "c:\Documents and Settings\user\desktop\file2.xml"

Writing command line arguments

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