Execute another programm from Java

Hello Java Gurus,
I am developing a java app that reads from my DB and do some calcs with it. I would need to execute another programm later sending some of the data as parameters.
In C I would use _exec() function, is there any function like that in Java?
Many thnks,
AC.

There is a method like
runtime.exec();
you could use that.

Similar Messages

How to execute another application from java ?

I want to execute another application ( not java ) from my java application. Is it possible ? How can we do it ? Please guide me...
thanx

Hi littlestuart,
Yes it's possible.
Your question is frequently asked, please search the forum or google for an answer.
/Kaj

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 execute Linux command from Java app.

Hi all,
Could anyone show me how to execute Linux command from Java app. For example, I have the need to execute the "ls" command from my Java app (which is running on the Linux machine), how should I write the codes?
Thanks a lot,

You can use "built-in" shell commands, you just need to invoke the shell and tell it to run the command. See the -c switch in the man page for your shell. But, "ls" isn't built-in anyays.
If you use exec, you will want to set the directory with the dir argument to exec, or add it to the command or cmdarray. See the API for the variants of java.lang.Runtime.exec(). (If you're invoking it repeatedly, you can most likely modify a cmdarray more efficiently than having exec() decompose your command).
You will also definitely want to save the returned Process and read the output from it (possibly stderr too and get an exit status). See API for java.lang.Process. Here's an example
java.io.BufferedReader br =
new java.io.BufferedReader(new java.io.InputStreamReader(
Runtime.getRuntime().exec ("/sbin/ifconfig ppp0").
getInputStream()));
while ((s = br.readLine()) != null) {...

Execute linux command from java

I wanna execute linux command from java, bu the output has error:
Return code = 1
top: failed tty get
The code as:
import java.io.*;
public class Execute {
     public static void main(String[] args) {
          try {
               final Process process = Runtime.getRuntime().exec("top");
               new Thread() {
                    public void run() {
                         try {
                              InputStream is = process.getInputStream();
                              byte[] buffer = new byte[1024];
                              for (int count = 0; (count = is.read(buffer)) >= 0;) {
                                   System.out.write(buffer, 0, count);
                         } catch (Exception e) {
                              e.printStackTrace();
               }.start();
               new Thread() {
                    public void run() {
                         try {
                              InputStream is = process.getErrorStream();
                              byte[] buffer = new byte[1024];
                              for (int count = 0; (count = is.read(buffer)) >= 0;) {
                                   System.err.write(buffer, 0, count);
                         } catch (Exception e) {
                              e.printStackTrace();
               }.start();
               int returnCode = process.waitFor();
               System.out.println("Return code = " + returnCode);
          } catch (Exception e) {
               e.printStackTrace();
}Help please.

Your code is probably good to run a program, that does not use terminal capabilities.
Program "top" is a little bit more complicated - you have to run it with a real terminal.
Try to run "xterm -e top". You can find an example how to run an external program
from java code in cnd/gdb module on http://cnd.netbeans.org
For example, take a look at openExternalProgramIOWindow() method on this page:
http://cnd.netbeans.org/source/browse/cnd/gdb/src/org/netbeans/modules/cnd/debugger/gdb/proxy/Attic/GdbProxyCL.java?rev=1.1.2.6.2.5&only_with_tag=release551_fixes&view=markup
It runs a command with external terminal.
Thanks,
Nik

Unable to execute Linux command from Java

Hi,
I am currently working on a code wherein i need to execute Linux command from Java. Below are some of the query i have.
1) Is there any efficient method of running OS commands from Java, rather than using Runtime and Process method.
2) Below is details of my code which fails in execution
**-- Java Version**
java version "1.6.0"
OpenJDK Runtime Environment (build 1.6.0-b09)
OpenJDK Server VM (build 1.6.0-b09, mixed mode)
-- Program Code ----
Where <path> = Path i put myself
package test;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.*;
public class GetInode{
     * @param args
     public static void main(String[] args) {
          GetInode test = new GetInode();
          test.getInode();
     public void getInode(){
          String command = "/usr/bin/stat -Lt <path>;
          System.out.println(command);
          Process process;
          Runtime rt;
          try{
          rt = Runtime.getRuntime();
          process = rt.exec(command);
          InputStreamReader isr = new InputStreamReader(process.getErrorStream());
          BufferedReader bre = new BufferedReader(isr);
          BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream());
          System.out.println(bre.readLine());
System.out.println(br.readLine().split(" ")[7]);
          process.destroy();
          }catch (Exception ex){
               System.out.println("Error :- " + ex.getMessage());
------Output -------------
/usr/bin/stat -Lt "<path>"
/usr/bin/stat: cannot stat `"<path>"': No such file or directory
Error :- null
Can any one help me what is wrong and why i am unable to run the Linux command from Java.

For clarity purpose............i m submitting actual code here
--- Code ---
package test;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.*;
public class GetInode{
* @param args
public static void main(String[] args) {
GetInode test = new GetInode();
test.getInode();
public void getInode(){
String command = "/usr/bin/stat -Lt \"/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt\"";
System.out.println(command);
Process process;
Runtime rt;
try{
rt = Runtime.getRuntime();
process = rt.exec(command);
InputStreamReader isr = new InputStreamReader(process.getErrorStream());
BufferedReader bre = new BufferedReader(isr);
BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));
System.out.println(bre.readLine());
System.out.println(br.readLine().split(" ")[7]);
process.destroy();
}catch (Exception ex){
System.out.println("Error :- " + ex.getMessage());
--- Output ---
[ratz]s0898671: java GetInode
/usr/bin/stat -Lt "/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt"
/usr/bin/stat: cannot stat `"/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt"': No such file or directory
Error :- null
-- Linux Terminal --
If i copy the first line from the output and execute on Linux terminal her is the output that i get
[ratz]s0898671: /usr/bin/stat -Lt "/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt"
/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt 12003 24 81a4 453166 10000 1c 360466554 2 0 1 1246638450 1246638450 1246638450 4096
Can you just assist me where am i really making mistake.......i was wondering if the command that i pass from Java....can be executed on Linux terminal why is it faling to run from java.........and when i print the Error Stream for process output........it show cannot Stat.......

Execute shell command from Java

Hi all,
I need some idea for executing shell script from Java programe.
For example i have start.sh script in /tmp/start.sh folder of unix server.
I want to execute shell script from local java code.
Any idea on this.

Hi,
Read the following articles/posts, maybe this could help you:
How to execute shell command from Java
Running system commands in Java applications | java exec example | alvinalexander.com
Want to invoke a linux shell command from Java - Stack Overflow

How execute Unix script from java?

Can I execute Unix script from java?

Yes. Using ProcessBuilder. And read [When Runtime.exec() wont|http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html]. It's old, but pretty much all of it is still true.

Is it possible to execute SAPGUI scripts from java program?

Hi everyone..
     I need to develop an java applications that executes the SAPGUI script or any technique that execute set of transaction as client.
     Is it possible to execute SAPGUI scripts from java program? if so, how it can be achieved? is there any other technique to achieve above mention scenario?.
     it will be more helpful, if docs related to that are shared..
     Thanks in advance

Oh, bummer. Would be much more convenient if I could just use iTunes for everything. Can't stand WMP. I wonder if WinAmp might be a good compromise?
Thanks for this answer . . .
Sharon

Cannt execute stored proc of one schema in another schema from java app.

I am posting my problem in this forum as i i though it could be server-independent.
I am working on apache tomcat and spring framework with Oracle db (schema/user A)
We access oracle db from our java application by setting jndi and works fine.We have sqlstatements, stored procs and functions all run fine.
Now we create a role (DBROLE) with all permissions to that original db schema/user(A) . We created another empty schema B and assigned that role(DBROLE) to that user B.
(We grant all kind of permissions on tables/packages of schema A to user role DBROLE and also created synonyms)
Intentions are: to access the schema A though schema B from application and avoiding direct access.
In our spring application, we replaced database-settings with schema B.
Things work fine: When its plain SQL statement is run from Java code but Stored proc wont run and we get
'Wrong num of arguments/data types' error.
Also all stored procs are in packages.To execute stored proc in java code, we use SimpleJdbcCall.
I also checked run stored proc from schema B and its works. Only from web app, it doesnt work.
Please suggest,what should be done to make this working or if there is other alternative.
Thanks

Instead of importing a scema in another schema specifiy the schemas in the external-schemaLocation property.
SAXParser saxParser = new SAXParser();
saxParser.setProperty("http://apache.org/xml/properties/schema/external-schemaLocation", "xmlschema1.xsd, xmlschema2.xsd");

Executing another exe from a java class

Hi All,
I want to execute another executable from a java class. I am doing that with the help of Runtime.getRuntime().exec(String) function.
My executable runs for quite sometime and it keeps printing something to stdout consistently.
I want to read whatever this exe is putting out to stdout as and when it is put out, not after the whole process has finished.
Now, Runtime.getRuntime().exec(String) just spawns the exe in another process space and I am not able to get its handle, maybe I have missed something.
Is there any other method/way to do what I want to?
TIA
-Satish

Now, Runtime.getRuntime().exec(String) just spawns the
exe in another process space and I am not able to get
its handle, maybe I have missed something.
Is there any other method/way to do what I want to?Acutally, Runtime.getRuntime().exec(String) returns a Process object. Use this process to "talk" to the program you just launched. For your needs, try Process.getOutputStream(). Take a look at the API for Process at http://java.sun.com/j2se/1.3/docs/api/java/lang/Process.html
Hope this helps.

How to execute SAPgui.exe from java code

Hi All,
Can any one provide me the exe file name of SAP GUI related.
I need to call the SAP GUI related exe file from java.
i tried with a small java prog which executes the exe files.
it works fine with notepad.exe,javac.exe . But i am unable to execute the SAPgui.exe.
This is my java code
try{
     Runtime rt=Runtime.getRuntime();
//String str= "C:
WINNT
system32
notepad.exe";
//Process pp=rt.exec("C:
j2sdk1.4.2_08
bin
javac");
Process pp=rt.exec("C:
Program Files
SAP
FrontEnd
SAPgui
SAPgui.exe");
BufferedReader br=new BufferedReader(new InputStreamReader(pp.getErrorStream()));
                     String line;
                     while ((line = br.readLine()) != null) {
                         System.out.println(line);
          }catch(Exception e){
               System.out.println(e);
and may i pass any additional parameters inorder to invoke this exe.
Please share your ideas abt this problem.
Its Urgent PLZ
Adv Thanks
Regds
Phani.

hi Rajesh,
here my complete code:
          try{
               Runtime rt=Runtime.getRuntime();
//               String str= "C:\Programmi\SAP\FrontEnd\SAPgui\saplogon.exe";
               String str= "C:\Programmi\SAP\FrontEnd\SAPgui\Sapgui.exe 10.113.10.201 00";
               //               Process pp=rt.exec("C:\j2sdk1.4.2_08\bin\javac");
               Process pp=rt.exec(str);
               BufferedReader br=new BufferedReader(new InputStreamReader(pp.getErrorStream()));
               String line;
               while ((line = br.readLine()) != null) {
               System.out.println(line);
               }catch(Exception e){
               System.out.println(e);
Please note that system number is only two digit and in your case is 00.
Another important think, i'm using the italian version of windows, so the program directory is c:\programmi, please change into c:\program files, or you can modify your code to be language indipendend using an system environment variable (if exist).
Hope this help
Francesco

Execute DOS command from java application

Hello,
I want to execute a DOS command (MOVE, in order to move an image from a folder to an other) from a java application. How can I do this?
Francesco

Yes I have tested it and it is working but only when executing a bacth file. For instance:
Runtime rt = Runtime.getRuntime();
try{
Process proc = rt.exec("move.bat");
}catch(Exception ex){
ex.printStackTrace();
}and the command in move.bat is:
move c:\\temp\\*.gif C:\\temp2
You don't have to use double slashes in batch files, only in Java. But anyway it is working both ways.
It is not working when you try to execute the command without the batch file:
Process proc = rt.exec("move c:\\temp\\*.gif C:\\temp2"); -> this will not work.
It should work. Try to execute another command to see what happens.

Running Shell Commands (not Executable) in Unix from Java

What are my options to run shell commands from Java?
My goal is to change my existing shell environment variables to some new ones provided by .anotherProfile.
Using an executable from Java is not an option because it does not work i.e. ( exec(". /home/.profile") ) brings up errors.
Someone has suggested that I start a child shell with that profile and work from there, but I'm unfamiliar with that sort of syntax and programming in general.
Any good help equals duke dollars :)

Well there are some possibilities. In the original thread you mentioned that you wanted the shell script to be executed to change some enviroment parameters of the shell the JVM is executing in.
If so, and you are able to rewrite the profile so you can parse it manually. Then you can change some environment setting by writing the JNI wrappers for the getenv and setenv system calls. (Check your man pages)
That will change the environment. I am just wondering what good it will do for you? What's use of sourcing the profile in a JVM?

How stored procedure get executed when called from java

When we create a stored procedure or function in oracle, it is compiled and stored there. From java when we call them no compilation is performed its a simple call. When a function or stored procedure is invoked from multiple instance of java objects(for a single session), does the stored procedure clone it self so that it can be called by different java objects which I think not possible at all. In such cases when one java object is interacting with the stored procedure, does other java objects go on a wait state. What happens if sessions are different.
Please help.

>
does oracle creates multiple instance of a particular stored procedure for different sessions or connections. if not then there might be some kind of waiting principle followed.. what happens exactly
>
What happens exactly is detailed in Chap. 14 Memory Architecture ni the Database concepts doc
http://docs.oracle.com/cd/E14072_01/server.112/e10713/memory.htm#i21266
The code is shared but the data isn't (see the lone exception to this below).
See the section on the Library Cache
>
Program Units and the Library Cache
The library cache holds executable forms of PL/SQL programs and Java classes. These items are collectively referred to as program units.
The database processes program units similarly to SQL statements. For example, the database allocates a shared area to hold the parsed, compiled form of a PL/SQL program. The database allocates a private area to hold values specific to the session that runs the program, including local, global, and package variables, and buffers for executing SQL. If multiple users run the same program, then each user maintains a separate copy of his or her private SQL area, which holds session-specific values, and accesses a single shared SQL area.
>
The exception is when code uses the SERIALLY_REUSABLE pragma. In that case the memory for package state is in the SGA and users do not have their own copy in their UGA.
See the SERIALLY_REUSABLE pragma in the PL/SQL Language doc
http://docs.oracle.com/cd/B28359_01/appdev.111/b28370/seriallyreusable_pragma.htm
>
The global memory for serially reusable packages is pooled in the System Global Area (SGA), not allocated to individual users in the User Global Area (UGA). That way, the package work area can be reused. When the call to the server ends, the memory is returned to the pool. Each time the package is reused, its public variables are initialized to their default values or to NULL.
Serially reusable packages cannot be accessed from database triggers or other PL/SQL subprograms that are called from SQL statements. If you try, the database generates an error.

Execute another programm from Java

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