Problem met when call external exe in jar.

hi all,
in my java project, i call an external exe . i met a problem that sometimes the exe is not fully finished. How could i confirm that the exe is finished before i start to use the output of this exe.
i use following code to call the external exe:
Runtime.getRuntime().exec(command).

Hi Avm,
thanks very much.
The simplest answer is that
getRuntime().exec(command).waitFor() will help you.
But besides of sync there are number of other
potential problems with Runtime.exec
Good examples and description there is here:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-
traps.html

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How can I call external exe in java

Hi ,
Is It Possible to call external exe in java.
I read Runtime.exe("some exe") but actually my exe expects some input to process for that how can i pass the input to my exe and how can get the response from exe to my java class.
any sample code is welcome.
Thanks
Babu H

example
import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.io.*;
public class RuntimeExample extends JFrame {
    private JTextArea textArea;
    private JTextField textField;
    private PrintWriter writer;
    public RuntimeExample()
        init();
        initProcess();
    public void init()
        textArea = new JTextArea(20, 80);
        textArea.setEditable(false);
        textField = new JTextField(30);
        textField.addKeyListener(new KeyAdapter()
            public void keyPressed(KeyEvent event) {
                if (event.getKeyCode() == KeyEvent.VK_ENTER)
                    if (writer != null)
                        textArea.setText("");
                        writer.print(textField.getText() + "\r\n");
                        writer.flush();
                        textField.setText("");
        Container container = getContentPane();
        JScrollPane scrollPane = new JScrollPane();
        scrollPane.setViewportView(textArea);
        container.add(scrollPane, BorderLayout.CENTER);
        container.add(textField, BorderLayout.SOUTH);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        textField.grabFocus();
        setVisible(true);
    public static void main(String[] args) {
        new RuntimeExample();
    public void initProcess()
        Runtime rt = Runtime.getRuntime();
        try
            //Process p = rt.exec(new String [] {"cmd", "/C", textField.getText()});
            //textArea.setText("");
            //textField.setText("");
            Process p = rt.exec("cmd");
            writer = new PrintWriter(p.getOutputStream());
            Thread thread1 = new Thread(new StreamReader(p.getErrorStream()));
            Thread thread2 = new Thread(new StreamReader(p.getInputStream()));
            thread1.start();
            thread2.start();
            System.out.println("Exit Value = " + p.waitFor());
        catch (Exception ex)
            textArea.append(ex.getMessage());
            ex.printStackTrace();
    public class StreamReader implements Runnable
        InputStream is;
        public StreamReader(InputStream is)
            this.is = is;
        public void run()
            try
                BufferedReader reader = new BufferedReader(new InputStreamReader(is));
                String data;
                while ((data = reader.readLine()) != null)
                    textArea.append(data + "\n");
                reader.close();
            catch (IOException ioEx)
                ioEx.printStackTrace();
}you can pass input to the exe by using getOutputStream() from Process and get the output from getInputStream() from Process

Problem meet when call exe in java.

hi all,
in my java project, i call an external exe . now the problem is that sometimes the exe is not fully finished. How could i confirm that the exe is finished before i start to use the output of this exe.
i use following code to call the external exe:
Runtime.getRuntime().exec(command).

Hi,
Please post this to an appropriate forum . this forum is exclusively related to creator
MJ

Error when calling external DLL function.

When calling a function in Oracle, the error happens
ORA-28575: '... error RPC connection to external procedures'
code:
create or replace library LibFunctions as 'c:\MyDLL.dll';
grant all PRIVILEGES on LibFunctions to public;
create or replace
FUNCTION Max(num1 in number, num2 in number) RETURN number IS
EXTERNAL LIBRARY LibFunctions
NAME "Max"
LANGUAGE C;
grant all PRIVILEGES on Max to public;
obs. Dll was created in Pascal.
What can this error?
tks,
Mauricio
Edited by: user13794390 on 19/01/2011 06:29

It's been a while since I used extproc. Anyway, it listener.ora make sure extproc is added. I'll assume you are on Unix:
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(SID_NAME = PLSExtProc)
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(ORACLE_HOME = path-to-oracle-home)
(PROGRAM = extproc)
) SY.

Can you call external exe file from Flex Air Application like notepad.exe

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Hi,
If you want to share code between a flex app and AIR, you
could isolate the common bits as a swc file and link to the swc
from both the flex and air project.
Also, you could have the flex mxml file and air mxml file
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Problem when calling external program

Hi,
I have a strange problem and no more idea how to solve it.
What I do:
In Java I call an external Fortran-exe with Runtime.getRuntime().exec(...) This Fortran program creates 4 files.
What I get:
One of the 4 files is incomplete, the first few lines are missing.
What makes me wonder:
When I take the exec-statement to the commandline and let it run there, everything is fine and the files contain all the info I need. All the 4 files are correct then.
What I also tried:
I tried to copy the (incomplete) file within Fortran. That means when I call the Fortran program I get 2 identical files then but with different filenames. Doing so on the commandline everything is fine again. But again, the same commandline String called in the exec in my Java program it is getting worse: The formerly incomplete file is empty now with 0 bytes.
Even if I wait for the process to finish does not help.
I do not understand it any more and would really like to know what happens there, why, and what can I do to avoid it or to get my complete output files. What does Runtime.getRuntime().exec(myString) do different than when I take the myString on the commandline?
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TIA

Hi,
unfortunately this does not help. I have already about 15 Fortran programs running this way which work accurately. So a possible problem with output stream does not look reasonable to me in this case.

Problems met when upgrading APEX within Oracle XE to APEX 4.0

Hi,
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Here's how I did (I'm on windows 7):
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PL/SQL procedure successfully completed.
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*+
ERROR at line 15:
ORA-06550: line 15, column 25:
PLS-00302: component 'DB_VERSION_IS_AT_LEAST' must be declared
ORA-06550: line 15, column 3:
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SQL>
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Enter a value below for the password for the Application Express ADMIN user.
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*+
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ORA-06550: line 3, column 5:
PL/SQL: Statement ignored
ORA-06550: line 4, column 5:
PLS-00201: identifier 'WWV_FLOW_SECURITY.G_USER' must be declared
ORA-06550: line 4, column 5:
PL/SQL: Statement ignored
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ORA-06550: line 5, column 5:
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ORA-06550: line 8, column 23:
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ORA-06550: line 7, column 15:
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ORA-06550: line 13, column 32:
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ORA-06550: line 12, column 9:
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ORA-06550: line 19, column 5:
PLS-00201: identifier 'WWV_FLOW_SECURITY.G_IMPORT_IN_PROGRESS' must be declared
ORA-06550: line 19, column 5:
PL/SQL: Statement ignored
Could anybody help me on this problem ? Thanks a lot.

Hi,
I assume your install did fail.
As you can not find log file I assume it is something relating folder permissions.
I do not know folder these permissions work in Windows.
But try give everybody read/write permission to your d:\apex.
Then try again
Regards,
Jari
Edited by: jarola on Mar 11, 2011 3:58 PM
And change your working directory to d:\apex before you run scripts.
Then you can run just
@apexins SYSAUX SYSAUX TEMP /i/And see this guide
http://www.oracle.com/technetwork/developer-tools/apex/upgrade-apex-for-xe-154969.html

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Hi ,
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com.sunopsis.wsinvocation.SnpsWSInvocationException: com.sunopsis.wsinvocation.SnpsWSInvocationException: This URL does not point to a valid WSDL
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Problem met when call external exe in jar.

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