Calling an executable from a java program

How can I call a compiled program from a java program. I have a fortran program, which I would like to call for execution from within my java program. My OS is linux.
Thanks,
An

Not quite sure in the case of fortran program, but one thing can be done, call ur fortran program from a batch (.bat file) and call this .bat file from java ;
try {
Process p = Runtime.getRuntime().exec("run.bat");
p.waitFor();
catch( Exception e ) {
}

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Possibility of calling standard actions from a java program

Hi ,
I am working for a project where customer wants to have option of saving orders as draft only and later convert to order if need be. However since we do not want many drafts to reside on server there is a need to delete these at a specified time. For draft orders I am using order templates since they stay in the database without getting converted to orders. Now I do not know how to go about the deletion part.
i need to write a program that would run on the server and which would fetch the templates (drafts) that have been created till a particular time and call the delete action of the template. Now the question is how do i call these actions from a java program where this java program will have to run on the server end (ie will be a backend process).
Please suggest.
Thanks
Roopali

hello roopali,
you can create a separate thread that will run your
code that will check for stale drafts and delete them.
it is just like a session management program but here
we will be looking over the drafts and not the session
objects.
now if you want the invocation of the action from another
program, a socket program would suffice but opening ports
will cause you network connections thru firewall.
if you can make use of HTTP servlet as your service
provider e.g., you can then just pass some action params
to invoke it.
regards
jo

Calling OCX Methods from a Java Program

Hi All,
Is it possible to call OCX methods from a Java program? If yes, can you please refer me to any documents or sample code to achieve this.
All inputs are highly appreciated.
Thanks
Tarek

JNI
http://java.sun.com/docs/books/tutorial/native1.1/index.html

Calling jsp page from a java program

Hello,
Is it possible to call a JSP page from a java program? If so, please let me know how it is possible.
I have a JSP page that inserts 10 records in a database based on the attribute given to the page. When the java program is executed all the 10 records need to be inserted.
The JSP page is already running fine in Tomcat.
Thanks and Regards,
Prasanna.

MVC has applied the standard of seperate your view , model and controller. I believe nobody will insert data from jsp page,better practice should be inserted from your database layer, normally is like DAO layer. so you should pass your data from jsp to your backend.
hopefully it's help u

Calling another application from a java program

Hi, Java ppl.
I wanted to know how can I call another program say a help application or an exe from a java program. anyone with any advice or a piece of code would help.
Thanks
Pradeep

I had the same situation and I tried the code that you sugested and it works. I was wondering, what am I expecting in the while loop that appears after the int inp; statement? Is some data going to be displayed on the screen? How essential is to have that while loop after the calling the exec() method?
Sorry for the amount of questions, I never tried this before.
Best regards,
Luis E.

Calling a servlet from a java program

I could not find a forum for servlet hence am posting
here
I have a servlet that accepts prameters and
gives some out put .
I want to be able to call this servlet ( invoke )
from a Java Program .
How do i do that ..
Any sample code /pointer would be appreciated.
Deepa

hi
you can try this code.
URL url = new URL("http://localhost:8888/yourServlet?param1=value1");
URLConnection con = url.openConnection();
StringBuffer sBuf = new StringBuffer();
BufferedReader bReader = new BufferedReader(
new InputStreamReader(
con.getInputStream()));
String line = null;
while((line = bReader.readLine()) != null) {
sBuf.append(line);
System.out.println(sBuf);
hope this helps
Shrini

How to launch executable from a java program

In c++ we can use a function WinExec to execute exe from a c++ program.
Is there a way to launch executables using java program. Lets say I have one executable with name "myexecutable.exe" and a java program "myprogram.java". How can I launch "myexecutable.exe" from the java program.
Is there a way to do this in Java?
Vijay

>>
class LoadExecutable
static void loadProcess()
Runtime r = Runtime.getRuntime();
Process p = r.exex("winword.exe");
public static void main(String args[])
loadProcess();
}Regards
- ManikantanBoth of these aren't good ideas - neither of them
deals with the input or output streams at all.
Everyone who's posted to this thread should read this.
None of you knows how to use Runtime.exec properly:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-t
aps.html
MOD
Thanks for the tips
-Regards
Manikantan

Call ODI Scenario from a Java Program

Hi,
I would like to invoke the ODI Scenario from a Java Program. Is there any way i can do this?
Please let me know if you have any posts related to this.
Thanks,
Mansur

Check this ..
How to run ODI scenario from java?

Calling another class from a java program

I tried to call the Server1.class from the password program, but I failed. The password program source code is as follows:
class PasswordDialog extends java.awt.Dialog implements java.awt.event.ActionListener
     * Constructor. Create this visual dialog component.
     public PasswordDialog(java.awt.Frame parent, PasswordVerifier verifier)
          super(parent);
          addWindowListener(new WindowEventHandler());
          setLayout(new java.awt.FlowLayout());
          setSize(500, 100);
          this.verifier = verifier;
          add(useridField = new java.awt.TextField(10));
          add(passwordField = new java.awt.TextField(10));
          add(okButton = new java.awt.Button("Submit"));
          add(cancelButton = new java.awt.Button("Cancel"));
          okButton.addActionListener(this);
          cancelButton.addActionListener(this);
          passwordField.setEchoChar('*');
          useridField.requestFocus();
     public void actionPerformed(java.awt.event.ActionEvent e)
          if (e.getSource() == okButton)
               // Invoke password verification callback
               try
                    boolean result = verifier.verifyPassword(
                         useridField.getText(), passwordField.getText());
                    if (! result) return;     // verification failed; don't close this dialog
               catch (Exception ex)
                    ex.printStackTrace();
               // Close this dialog
               System.out.println("I still can't call the Server1 class");
               dispose();
          else if (e.getSource() == cancelButton)
               dispose();
     class WindowEventHandler extends java.awt.event.WindowAdapter
          public void windowClosing(java.awt.event.WindowEvent e)
               System.exit(0);
     // Private objects
     private PasswordVerifier verifier;
     private java.awt.TextField useridField;
     private java.awt.TextField passwordField;
     private java.awt.Button okButton;
     private java.awt.Button cancelButton;
interface PasswordVerifier
     public boolean verifyPassword(String userid, String password) throws Exception;
public class password implements PasswordVerifier
     * Main routine for testing only.
     public static void main(String[] args)
          password verifier = new password();
          java.awt.Frame f = new java.awt.Frame("Password Verifier");
          f.setSize(100, 100);
          f.show();
          PasswordDialog d = new PasswordDialog(f, verifier);
          d.show();
     public boolean verifyPassword(String userid, String password) throws Exception
          return (userid.equals("Albert") && password.equals("Einstein"));
and the Server1.java is as follows:
//Server Application
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
public class Server1 extends Frame implements ActionListener,Runnable,KeyListener
ServerSocket s;
Socket s1;
BufferedReader br;
BufferedWriter bw;
TextField text;
TextField name;
Button exit,clear;
Label label;
List list;
Panel p1=null;
Panel p2=null;
Panel sp21=null;
Panel sp22=null;
Panel jp=null;
public void run()
          try{s1.setSoTimeout(1);}catch(Exception e){}
          while (true)
               try{
list.add(br.readLine());
               }catch (Exception h){}
if(list.getItemCount()==7)
list.remove(0);
public Server1(String m)
{       super(m);
jp=new Panel();
p1=new Panel();
p2=new Panel();
sp21=new Panel();
sp22=new Panel();
jp.setLayout(new GridLayout(2,1));
p1.setLayout(new GridLayout(1,1));
p2.setLayout(new GridLayout(2,1));
sp21.setLayout(new FlowLayout());
sp22.setLayout(new FlowLayout());
exit = new Button("Exit");
clear = new Button("Clear");
exit.addActionListener(this);
clear.addActionListener(this);
list = new List(50);
text = new TextField(43);
name = new TextField(10);
label = new Label("Enter your name");
name.addKeyListener(this);
text.addKeyListener(this);
p1.add(list);
sp21.add(text);
sp21.add(exit);
sp22.add(label);
sp22.add(name);
sp22.add(clear);
p2.add(sp21);
p2.add(sp22);
jp.add(p1);
jp.add(p2);
this.add(jp);
setBackground(Color.orange);
setSize(380,300);
setLocation(0,0);
setVisible(true);
setResizable(false);
name.requestFocus();
try{
s = new ServerSocket(786);
               s1=s.accept();
               br = new BufferedReader(new InputStreamReader(
                         s1.getInputStream()));
               bw = new BufferedWriter(new OutputStreamWriter(
                         s1.getOutputStream()));
bw.write("Welcome");bw.newLine();bw.flush();
               Thread th;
               th = new Thread(this);
               th.start();
          }catch(Exception e){}
public static void main(String args[])
new Server1("Server");
     public void actionPerformed ( ActionEvent e)
if (e.getSource().equals(exit))
               System.exit(0);
else if (e.getSource().equals(clear))
{ name.setText(" ");
name.setEditable(true);
public void keyPressed(KeyEvent ke) {
if(text.equals(ke.getSource()))
if(ke.getKeyCode()==KeyEvent.VK_ENTER)
try{
bw.write(name.getText()+">>"+text.getText());
               bw.newLine();bw.flush();
               }catch(Exception m){}
list.add(name.getText()+">>"+text.getText());
text.setText("");
else if(name.equals(ke.getSource())) {
if(ke.getKeyCode()==KeyEvent.VK_ENTER)
name.setEditable(false);
text.requestFocus();
public void keyReleased(KeyEvent ke)
//something
public void keyTyped(KeyEvent ke)
//something
I tried to create a new object by typing:
Server1 s = new Server1();
then call the main function
new Server1("Server");
but it doesn't work. Anybody can help me with this?

try
Server1 s = new Server1();
s.Server1("Server");
or
new Server1().Server1("Server");

Execute several UNIX OS commands from inside Java program

Greetings,
I would like to be able to execute from a Java program several of the following UNIX commands
script filename
cd
date
grep
diff
I have been able to get a single command to work with
Runtime rt = Runtime.getRuntime();
Process p = rt.exec("dir");
My goal here is to accomplish a Java program which will use JDBC to access an Oracle database with SQL and then compare the resultant flat file with a diff command in Unix to another delimited file from an Excel spreadsheet. Your input is appreciated.
Thank you

I would suggeat to use JDBC to get the data from database and then read your file and then use existing java diff program from following link to find the differences between the files
http://www.bmsi.com/java/
I hope this helps
VAN

Cannot call ANY stored functions from my Java program

My problem is that I cannot call ANY stored procedure from my Java
program. Here is the code for one of my stored procedures which runs
very well in PL/SQL:
PL/SQL code:
CREATE OR REPLACE PACKAGE types AS
TYPE cursorType IS REF CURSOR;
END;
CREATE OR REPLACE FUNCTION list_recs (id IN NUMBER)
RETURN types.cursorType IS tracks_cursor types.cursorType;
BEGIN
OPEN tracks_cursor FOR
SELECT * FROM accounts1
WHERE id = row_number;
RETURN tracks_cursor;
END;
variable c refcursor
exec :c := list_recs(11)
SQL> print c
COLUMN1 A1 ROW_NUMBER
rec_11 jacob 11
rec_12 jacob 11
rec_13 jacob 11
rec_14 jacob 11
rec_15 jacob 11
Here is my Java code:
import java.sql.*;
import java.io.*;
import oracle.jdbc.driver.*;
class list_recs
public static void main(String args[]) throws SQLException,
IOException
String query;
CallableStatement cstmt = null;
ResultSet cursor;
// input parameters for the stored function
String user_name = "jacob";
// user name and password
String user = "jnikom";
String pass = "jnikom";
DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
try { Class.forName ("oracle.jdbc.driver.OracleDriver"); }
catch (ClassNotFoundException e)
{ System.out.println("Could not load driver"); }
Connection conn =
DriverManager.getConnection (
"jdbc:oracle:thin:@10.52.0.25:1521:bosdev",user,pass);
try
String sql = "{ ? = call list_recs(?) }";
cstmt = conn.prepareCall(sql);
// Use OracleTypes.CURSOR as the OUT parameter type
cstmt.registerOutParameter(1, OracleTypes.CURSOR);
String id = "11";
cstmt.setInt(2, Integer.parseInt(id));
// Execute the function and get the return object from the call
cstmt.executeQuery();
ResultSet rset = (ResultSet) cstmt.getObject(1);
while (rset.next())
System.out.print(rset.getString(1) + " ");
System.out.print(rset.getString(2) + " ");
System.out.println(rset.getString(3) + " ");
catch (SQLException e)
System.out.println("Could not call stored function");
e.printStackTrace();
return;
finally
cstmt.close();
conn.close();
System.out.println("Stored function was called");
Here is how I run it, using Win2K and Oracle9 on Solaris:
C:\Jacob\Work\Java\Test\Vaultus\Oracle9i\FunctionReturnsResultset>java
list_recs
Could not call stored function
java.sql.SQLException: ORA-00600: internal error code, arguments:
[ttcgcshnd-1], [0], [], [], [], [], [], []
at
oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:168)
at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:208)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:543)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1405)
at oracle.jdbc.ttc7.TTC7Protocol.fetch(TTC7Protocol.java:889)
at
oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:490)
at
oracle.jdbc.driver.OracleStatement.getCursorValue(OracleStatement.java:2661)
at
oracle.jdbc.driver.OracleStatement.getObjectValue(OracleStatement.java:4189)
at
oracle.jdbc.driver.OracleStatement.getObjectValue(OracleStatement.java:4123)
at
oracle.jdbc.driver.OracleCallableStatement.getObject(OracleCallableStatement.java:541)
at list_recs.main(list_recs.java:42)
C:\Jacob\Work\Java\Test\Vaultus\Oracle9i\FunctionReturnsResultset>
Any help is greatly appreciated,
Jacob Nikom

Thank you for your suggestion.
I tried it, but got the same result. I think the difference in the syntax is due to the Oracle versus SQL92 standard
conformance. Your statament is the Oracle version and mine is the SQL92. I think both statements are acceptable
by the Oracle.
Regards,
Jacob Nikom

Need to execute tcl script from a Java Program

Hello,
I need to execute a tcl script from a Java Program. But I do not know how to call the tcl Interpreter. Can anybody help me?

Iam using the exec command as follows:
Process proc =
rt.exec("C:/SpirentConnect/engines/tcl/8.3.4/windows/s
ctcl.exe C:/Hello.tcl");
But Hello.tcl is not executed.And does that exact string work on the command line?
And what is the return code from running it?

Executing a stored procedure from a java program

Hi.. how can i call a oracle stored procedure from a java
program. the OSP has four IN parameters and one OUT parameter(a
cursor). when i try this way.. i get an error
con = DriverManager.getConnection(url, "stored", "stored");
CallableStatement cs =
con.prepareCall(
"{call stored_proce_1(?,?,?,?,?)}");
cs.registerOutParameter(1, OracleTypes.CURSOR);
cs.setString(2, "14541");
cs.setString(3, "gen");
cs.setInt(4, 0);
cs.setInt(5, 5);
ResultSet rs =cs.getResultSet();
while(rs.next()){
System.out.println(rs);
appreciate ur help.
qs

I'm no expert on this, but I have a similar call where I fetch
an Oracle REF CURSOR from a call to a stored function. If you
fetch the cursor as an Object from your CallableStatement, you
can then cast it to a ResultSet e.g.
mystatement.executeUpdate();
ResultSet rs = (ResultSet) mystatement.getObject(1);
Then you should be able to loop through your ResultSet as usual.
Good luck!
Chris

How to execute unix command from the Java program running on Windows

Hello,
I need to
1. Execute a unix shell script from a Java program running on the Windows.
2. I also need to capture the output of this shell script in my program.
Please suggest me how to achieve this.
Thanks in Advance.

Hi...
Something is missing here
If you want to execute a shell script in windows that not posible unless you find or develop a unix shell script parser for windows.
But if you are trying the execute a unix shell script on a remote unix computer from your java program running on a windows platform you can do that by logging on to the UNIX terminal which is running on port 23 I think.
You can test this using telnet tool on windows
just type on command prompt
telnet <ip of the unix pc> <port number this case 23>
you should get the unix terminal. If that works you can do the same through java or you can directly conect to port 23 of that pc using sockets that way your program will be platform independant

How can I execute a batch file from my java program

Hi,
Can someone help me or direct me to a link,
How can I execute a DOS batch file from my java program?
Thanks

You will need to grab a handle to the process's
outputstream so u can see its output.The OP didn't mention any output from any batch file;
nor any input for that
matter,so lets not complicate matters here for now
ok?Actually I think this is essential to see whether it works or not. It's either that or do some manual check to see whether it ran, which is not exactly elegant, and in some cases this may not be easier than simply writing the output stream code, or in fact it may be impossible to check manually.
I'm sure it wasn't intentional that your post appeared to be bristling with attitude.

Calling an executable from a java program

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