Executing external files within java

Could someone pls tell me how i can execute external files, i.e. .bat files within java. thanks.

See java.lang.Runtime and java.lang.Process classes.
http://java.sun.com/j2se/1.4.1/docs/api/java/lang/Runtime.html
http://java.sun.com/j2se/1.4.1/docs/api/java/lang/Process.html
And if you search this site you can probably find a ton of examples.
Keep in mind that using this can limit portablilty of your Java application.

Similar Messages

Executing a file within java

Hey,
I have what seems like a simple problem. I want to write code that executes a jar file. For example I want a to write a class that executes a executable jar file. I have created the jar file called 1.jar and now I want to execute it in the code of another java program Can anyone help me accomplish this with an example. I have tried using exec and its not working right here is some of my code
public void runFile()throws Exception
Runtime.getRuntime().exec(". 1.jar");
it comes up with the error
Exception in thread "main" java.io.IOException: CreateProcess: . 1.jar
error=2
at java.lang.Win32Process.create(Native Method)
PLEASE HELP.
thanks

Your awesome thanks,
That worked, however I have one more question for you. Will this run on machines that are just using Java runtime environment?
basically will this work on any machine with java installed?

Executing batch file from Java stored procedure hang

Dears,
I'm using the following code to execute batch file from Java Stored procedure, which is working fine from Java IDE JDeveloper 10.1.3.4.
public static String runFile(String drive)
String result = "";
String content = "echo off\n" + "vol " + drive + ": | find /i \"Serial Number is\"";
try {
File directory = new File(drive + ":");
File file = File.createTempFile("bb1", ".bat", directory);
file.deleteOnExit();
FileWriter fw = new java.io.FileWriter(file);
fw.write(content);
fw.close();
// The next line is the command causing the problem
Process p = Runtime.getRuntime().exec("cmd.exe /c " + file.getPath());
BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while ((line = input.readLine()) != null)
result += line;
input.close();
file.delete();
result = result.substring( result.lastIndexOf( ' ' )).trim();
} catch (Exception e) {
e.printStackTrace();
result = e.getClass().getName() + " : " + e.getMessage();
return result;
The above code is used in getting the volume of a drive on windows, something like "80EC-C230"
I gave the SYSTEM schema the required privilege to execute the code.
EXEC DBMS_JAVA.grant_permission('SYSTEM', 'java.io.FilePermission', '<<ALL FILES>>', 'read ,write, execute, delete');
EXEC DBMS_JAVA.grant_permission('SYSTEM', 'SYS:java.lang.RuntimePermission', 'writeFileDescriptor', '');
EXEC DBMS_JAVA.grant_permission('SYSTEM', 'SYS:java.lang.RuntimePermission', 'readFileDescriptor', '');
GRANT JAVAUSERPRIV TO SYSTEM;
I have used the following to load the class in Oracle 9ir2 DB:
loadjava -u [system/******@orcl|mailto:system/******@orcl] -v -resolve C:\Server\src\net\dev\Util.java
CREATE FUNCTION A1(drive IN VARCHAR2) RETURN VARCHAR2 AS LANGUAGE JAVA NAME 'net.dev.Util.a1(java.lang.String) return java.lang.String';
variable serial1 varchar2(1000);
call A1( 'C' ) into :serial1;
The problem that it hangs when I execute the call to the function (I have indicated the line causing the problem in a comment in the code).
I have seen similar problems on other forums, but no solution posted
[http://oracle.ittoolbox.com/groups/technical-functional/oracle-jdeveloper-l/run-an-exe-file-using-oracle-database-trigger-1567662]
I have posted this in JDeveloper forum ([t-853821]) but suggested to post for forum in DB.
Can anyne help?

Dear Peter,
You are totally right, I got this as mistake copy paste. I'm just having a Java utility for running external files outside Oracle DB, this is the method runFile()
I'm passing it the content of script and names of file to be created on the fly and executed then deleted, sorry for the mistake in creating caller function.
The main point, how I claim that the line in code where creating external process is the problem. I have tried the code with commenting this line and it was working ok, I made this to make sure of the permission required that I need to give to the schema passing security permission problems.
The function script is running perfect if I'm executing vbs script outside Oracle using something like "cscript //NoLogo aaa1.vbs", but when I use the command line the call just never returns to me "cmd.exe /c bb1.bat".
where content of bb1.bat as follows:
echo off
vol C: | find /i "Serial Number is"
The above batch file just get the serial number of hard drive assigned when windows formatted HD.
Same code runs outside Oracle just fine, but inside Oracle doesn't return if I exectued the following:
variable serial1 varchar2(1000);
call A1( 'C' ) into :serial1;
Never returns
Thanks for tracing teh issue to that details ;) hope you coul help.

How to call external files from java?

How to call external files in java. For example how to call a *.pdf file to open in its default editor(say Acrobat), or a *.html file to open in the default browser or a *.txt file in a notepad etc..,
In my program i have *.chm (Compiled Windows HTML Help) help file. how to open it in its default editor it?

Jayarathina_Madharasan wrote:
no one answered my questionHi what wrong did i do...basically insulted all the volunteers here who took the time to consider your question and try to offer you help. Other than that, you did nothing wrong.
From JavaRanch :
And even if an answer doesn't solve your problem, even if it should totally miss the point - the best thing to do to motivate others to continue trying to help you is showing respect and gratitude for the investment of time that was put into dealing with your issue.
Edited by: Encephalopathic on Apr 14, 2008 10:01 AM

Executing a file with Java?

Hi,
I wanted to know how I could execute a file with java. Here are a couple scenarios - let's say I am developing an anti-spyware utility and I wanted to first write a batch file, and then create it in a folder, then run it when they click "Run". Then afterwards I want to shutdown their computer.
My Mindset:
- FileWriter to create the .bat and write the Batch commands.
- Execute the batch file.
- Execute the shutdown.exe file to reboot their PC.
So my simple question is, how can I execute a file?
Thanks!
-Josh

Well here is the code I have:
            try
                Runtime.getRuntime().exec("cmd.exe /c test.bat");
            catch(IOException e1)
                //NOTHING
            }Now my cmd.exe is obviously in my Windows System32 folder, and my "test.bat" file is in my C:\ root directory. So I am wondering why that wont execute. I tried a fer other things too like:
Runtime.getRuntime().exec("cmd.exe c:\test.bat");that didn't work either, because you can't have a "\" in a string...
So how can I get this thing to execute the batch file?

How to execute ".exe" files using java

Hi,
This is guruvulu,
I have a problem in executing ".exe" files.For Example InternetExplorer.

Hi,
You can execute .exe files in JAVA using the following code.
Runtime rt1 = Runtime.getRuntime();
Process pc = rt1.exec("someexe.exe");
you can get the output of the executed exe file in
in = pc.getInputStream(); //this returns a InputStream
hope this solves your problem.
regards,
P.Venkat

How to execute an external file in java ?

How to execute an external file , where the file name of the external file is in unicode character. (i,e, may be in Chinese character).

Process p = Runtime.getRuntime().exec("/path/to/executable");
This is write. But my question is while the file name is in Chinese font.
It means while a file name is in Chinese font or any unicode character that are supported by window but not in the command prompt. In this case the file name is changed to ??????.doc like.
So, while trying to execute this it shows File not found message.

Error executing batch file within web application

Hi all,
I am trying to execute a batch file from within my web application (struts 1.2).
The batch file is being kept inside the 'src' folder. The batch file contains only one command to open NOTEPAD.
The code inside my Action class is:
URL url = getClass().getResource("/test.bat");
java.io.File file = new java.io.File(url.getPath()) ;
String path = file.getCanonicalPath();
r.exec(path);
I have deployed this on tomcat and get an error like this:
java.io.IOException: Cannot run program "C:\Program%20Files\Apache%20Software%20Foundation\Tomcat%206.0\webapps\CIGTAFAPP\WEB-INF\classes\test.bat": CreateProcess error=2, The system cannot find the file specified
The problem is not with the batch file because when I try to execute the file directly from the classes folder, it opens up the notepad editor.
I have a specific requirement where I need to create/read this batch file from within the project structure.
Can someone please help me with this?
Regards

The entire content of the file is as below:
set javaTestProjectPath=D:\projects\CIGTAF\LRTestCases
C:
cd %javaTestProjectPath%
set path=C:\Program Files\Java\jdk1.6.0_21\bin
set classpath=%javaTestProjectPath%\bin;%javaTestProjectPath%\lib\selenium-server-standalone-2.20.0.jar;%javaTestProjectPath%\lib\testng-6.4.jar;%javaTestProjectPath%\lib\junit-4.10.jar;%javaTestProjectPath%\lib\poi-3.6-20091214.jar;%javaTestProjectPath%\lib\mail.jar
javac -verbose %javaTestProjectPath%\src\com\core\testscripts\Mailsetup.java -d %javaTestProjectPath%\bin
javac -verbose %javaTestProjectPath%\src\com\core\testscripts\MailAuthenticator.java -d %javaTestProjectPath%\bin
javac -verbose %javaTestProjectPath%\src\com\core\testscripts\ReadData.java -d %javaTestProjectPath%\bin
javac -verbose %javaTestProjectPath%\src\com\core\testscripts\ReadWriteExcelResults.java -d %javaTestProjectPath%\bin
javac -verbose %javaTestProjectPath%\src\com\core\testscripts\SeleniumFramework.java -d %javaTestProjectPath%\bin
java org.testng.TestNG %javaTestProjectPath%\SelXD-Config.xml -d %javaTestProjectPath%\test-output
none of these are getting executed.
regards
Edited by: 887789 on May 4, 2012 1:46 AM

How to execute external program in java?

My question is how to execute an external program in java.
I need to call a unix command in java.
Thanks.

it depends on what you are trying to do. Following are the two methods
1. Runtime.exec() : this method allows you just to call an external program as a seperate process
2. JNI (Native Interface) :- As of right now only C and C++ are supported by this method. This method allows you to directly call the C/C++ methods from JAVA

How to execute .msi files from java program

Hi friends,
i have written a java program which invokes and thereby execute any executable files like .exe and .bat.
So its working fine with .exe and .bat files, but it is not working with .msi files.......can you please help me how can i execute .msi files as well??
public class Executeexe {
     public static void main(String ar[])
          try
          Process p=null;
          Runtime rt=Runtime.getRuntime();
          p=rt.exec("D:\\mysql-essential-5.0.83-win32.msi");
          p.waitFor();
catch(Exception e)
}here is the program

Make sure that the command that's being exec'd works from the cmd line.
Then read this article and do what it says:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
Then if you still are having problems explain what "...it is not working with .msi files..." really means, and provide a [SSCCE Example program|http://mindprod.com/jgloss/sscce.html]

How to write or send String to an external file in java

Hi guys...!
I am writing a program in which I have to send some texts to an external file. If the file is not empty, I want the program to append to that file instead of overwriting the file.
Any suggestions...guys??
Thanks...
--- Spirit_Away

Hi therer...!
Thanks for your suggestion... But I forgot to mention
that I'm using XML in my java program and the method
"endElement()" for XML throws a "SAXException" and it
would not let me add another exception next to it
...like the one thrown by the "FileWriter", which is
IOException...
Thanks....
--- Spirit_AwayIn that case you might be too stupid to be programming Java.

Executing exe files from java program

Hi,
I need to execute exe files and pass arguments to them from my java code.
Can you give me guidelines to do that as i haven't done that before.
Thanks.

http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Runtime.html
getRuntime() method.
exec() method.

Executing vbscript from within java

Hi,
Does anyone knows a way to execute a vbscript from within java and capture its output.
thanks

Do you mean emulate an interpreter?

Executing unix script within java and getting the return value

Hi
I am executing a unix script from within java which will return me a value. Is there a way I get this value and use it inside my java code without doing this:
BufferedReader in = new BufferedReader( new InputStreamReader( ls_proc.getInputStream() ));
//readLine reads in one line of text
int k = 1, i = 0;
while (( ls_str = in.readLine()) != null)
--kirk123

I was hoping to get what I want in one or two line codes.
--kirk123

Executing an HTML file within java program

I want my java code to be able to open/execute an HTML file that I have. How do you do this?
Thanks.

You can display html in a java app, but it is not so simple to run a browser. What you want to look up is the WebBrowser class. Here is an excerpt from some code of mine that displays a url in the browser app in a panel, but there's some chaff in my code you would not be interested in (I'm using a card layout). You're better off loocing up org.jdesktop.jdic.browser which contains the WebBrowser class    /**
     * Reveal the container with the browser display. The browser display is
     * currently hidded using a CardLayout, so it is a simple matter to swap
     * displays; however, we put off actually loading the web page until the
     * first time the display is revealed.
     * @return true if the URL could be resolved and the given web page
     * displayed.
    public boolean showBrowser(
        java.net.URL pURL )
        // See if the web page component has not initialized.
        if ( pWebBrowser == null )
            pWebBrowser = new WebBrowser();
            pBrowserPane.setViewportView( pWebBrowser );
        if ( aLastURLVisited == null || ! aLastURLVisited.equals( pURL ) )
            pWebBrowser.refresh();
            pWebBrowser.setURL( pURL );
            aLastURLVisited = pURL;
        pDualLayout.show( pDualPanel, BROWSER_PANEL );
        return true;
    }

Executing external files within java

Similar Messages

Maybe you are looking for