Trying to execute a python script through java

I would like to make a command line call from java to execute a python script. The command line call would look like this:
tilemaker.py -s 128 -Q 0 -b FFFFFF AlternateExample.png
Also this has to be platform independent.
I am aware of Jython but I can't use it at this point due to technical restrictions.

you can use the jep (Java Embedded Python) package...it's very simple and u just need to call a method.....
see the following links....
http://jepp.sourceforge.net/javadoc/jep/Jep.html
http://jepp.sourceforge.net/

Similar Messages

Running Shell scripts through JAva

Hi,
I tried to execute a Shell script through a Java program.
The code I used is as below:
import java.lang.*;
import java.io.*;
public class sys {
public static void main(String[] args) {
Runtime rt = Runtime.getRuntime();
String[] callAndArgs = { "chgpasswd" };
try {
Process child = rt.exec(callAndArgs);
child.waitFor();
System.out.println("Process exit code is: " + child.exitValue());
catch(IOException e) {
System.err.println( "IOException starting process!");
catch(InterruptedException e) {
System.err.println( "Interrupted waiting for process!");
The "chgpasswd" shell script calls the "passwd" command of Unix.
It threw out an IO exception.
Then I gave the parameter as "./chgpasswd". It now gave an exit value of 255.
The "chgpasswd" script exists in the same directory as the .class file.
I checkd up the exit code reference...it says exit value of 255 could mean as exit code out of range........an exit code > 255....which unfortunately has no documentation, I guess.
Can you help ?

This is on a Unix platform, correct? Assuming so...
If I remember correctly, exit codes can be greater than 255. To get the real exit code equates to something like: exitcode & 512 to obtain the real exit code.
Make sure "chgpasswd" shell script has the execute permissions set. Additionally, make sure that the first line of the script (the magic line) has the appropriate shell/interpreter to execute specified. For example, if "chgpasswd" were a Bourne (sh) script, the first like would be:
#!/bin/shFor perl, it may be something like:
#!/usr/bin/perlIt needs to be the absolute path to the shell/interpreter is the point.

Exceuting SQL Script through java

Hi All
I am making an installer for my application. How do i execute a SQL script through java. Its a sepeate file that has the SQL script for DB creation.
Regards
Abhinav

If you database support ";" to separate sqll, then you can use Statement.execute(sql); to run all SQLscipt once, otherwise you need to load all sqls into Vector, then reun sql step by step. Copy some code for instance:
public final static Object[] getSQLStatements(String sqlFile) throws java.
io.IOException {
java.util.Vector v = new java.util.Vector(1000);
try {
java.io.BufferedReader br = new java.io.BufferedReader(new java.io.
FileReader(sqlFile));
java.util.Vector batchs = new java.util.Vector(10);
String temp;
while ( (temp = br.readLine()) != null) {
temp = temp.trim();
if (temp.length() == 0)
continue;
switch (temp.charAt(0)) {
case '*':
case '"':
case '\'':
// System.out.println(temp);
break; //Ignore any line which begin with the above character
case '#': //Used to begin a new sql statement
if (batchs.size() > 0) {
v.addElement(getSQLStatements(batchs));
batchs.removeAllElements();
break;
case 'S':
case 's':
case '?':
if (batchs.size() > 0) {
v.addElement(getSQLStatements(batchs));
batchs.removeAllElements();
v.addElement(temp);
break;
default:
batchs.addElement(temp);
break;
if (batchs.size() > 0) {
v.addElement(getSQLStatements(batchs));
batchs.removeAllElements();
br.close();
br = null;
catch (java.io.FileNotFoundException fnfe) {
v.addElement(sqlFile); //sqlFile is a sql command, not a file Name
Object[] statements = new Object[v.size()];
for (int i = 0; i < v.size(); i++)
statements[i] = v.elementAt(i);
return statements;
for (int i = 0; i < statements.length; i++) {
if (statements[i] instanceof java.lang.String) {
String temp = (java.lang.String) statements;
switch (temp.charAt(0)) {
case 'S':
case 's':
case '?':
System.out.println(temp);
rs = stmt.executeQuery(temp);
ResultSetMetaData resultSetMetaData = rs.
getMetaData();
int iNumCols = resultSetMetaData.getColumnCount();
for (int j = 1; j <= iNumCols; j++) {
System.out.println(resultSetMetaData.getColumnLabel(j)
+ " " + resultSetMetaData.getColumnTypeName(j)
+ " " + resultSetMetaData.getColumnType(j)
+ " " + resultSetMetaData.getPrecision(j)
+ " " + resultSetMetaData.getScale(j)
Object colval;
long ncount = 0;
while (rs.next()) {
// System.out.print(rs.rowDeleted()+" ");
ncount++;
for (int j = 1; j <= iNumCols; j++) {
colval = rs.getObject(j);
System.out.print(colval + " ");
System.out.println();
rs.close(); //Let the CONCUR_UPDATABLE resultSet release its open files at once.
rs = null;
System.out.println(
"The total row number of resultset: " + ncount);
System.out.println();
break;
default:
int updateCount = stmt.executeUpdate(temp);
System.out.println(temp + " : " + updateCount);
System.out.println();
else if (statements[i] instanceof java.lang.Object[]) {
int[] updateCounts;
Object[] temp = (java.lang.Object[]) statements[i];
try {
for (int j = 0; j < temp.length; j++){
System.out.println( temp[j]);
stmt.addBatch( (java.lang.String) temp[j]);
updateCounts = stmt.executeBatch();
for (int j = 0; j < temp.length; j++)
System.out.println((j+1)+":"+temp[j]);
for (int j = 0; j < updateCounts.length; j++)
System.out.println((j+1)+":" +updateCounts[j]);
catch (java.sql.BatchUpdateException e) {
updateCounts = e.getUpdateCounts();
for (int j = 0; j < updateCounts.length; j++)
System.out.println((j+1)+":"+updateCounts[j]);
java.sql.SQLException sqle = e;
do {
System.out.println(sqle.getMessage());
System.out.println("Error Code:" +
sqle.getErrorCode());
System.out.println("SQL State:" + sqle.getSQLState());
sqle.printStackTrace();
while ( (sqle = sqle.getNextException()) != null);
catch (java.sql.SQLException sqle) {
do {
System.out.println(sqle.getMessage());
System.out.println("Error Code:" +
sqle.getErrorCode());
System.out.println("SQL State:" + sqle.getSQLState());
sqle.printStackTrace();
while ( (sqle = sqle.getNextException()) != null);
stmt.clearBatch();
System.out.println();

Running Python Scripts through Labwindows/CVI

Hello,
I'm trying to execute Python scripts through Labwindows/CVI. I believe I have the correct library for the code to access in my project. I'm getting errors as it can't find "io.h", "stat.h", or "wchar.h" files. There is another post on this, where a modified pyconfig.h file was provided, however that file does not work for me. I'm not sure how to obtain the correct files for what I need here. Is there any dependable method to do this?
I'm on Windows 7, I'm running CVI version 9.1.1 and Python 2.6.6 (32-bit). The library file I'm using was proveded as part of the python install, called "Python26.lib". I zipped and attached the project, but to get it working you have to download Python (http://www.python.org/download/releases/2.6.6/), and point CVI to the "Python.h" header file (in the "include" directory under the "Python26" directory.
Attachments:
Test project.zip ‏4 KB

Where are these .h files located? If you know where these files are located go to Options>>Environment...>>Include Paths... you can add directories that the workspace will look for include files that are not explicitly included in your project.
Ian M.
National Instruments

Error while executing unix shell script from java program

Hi All,
I am trying to execute unix shell script from a java program using Runtime.execute() method by passing script name and additional arguments.
Code snippet :
Java Class :
try{
     String fileName ="test.ksh";
     String argValue ="satish"; // value passed to the script
     String exeParam = "/usr/bin/ksh "+fileName+" "+argValue;
     Process proc = Runtime.getRuntime().exec(exeParam);
     int exitValue = proc.waitFor();
     sop("Exit Value is : "+exitValue);
catch(Exception e)
e.printStackTrace();
}Test.ksh
export -- application realated paths..
nohup abc.exe 1> test.log 2>&1;
$1
exit.By running the above java class , i am getting exit Value: 139 and log file test.log of 0 bytes.
when i am running the same command (/usr/bin/ksh test.ksh satish) manually, it's calling abc.exe file successfully
and able generate the logs properly.
Pls let us know where exactly i am stuck..
Thanks in advance,
Regards,
Satish

Hi Sabre,
As per the guidelines provided by the article, i had done below changes..
InputStream is = null;
InputStreamReader iStreamReader = null;
BufferedReader bReader = null;
String line = null;
try{
String fileName ="test.ksh";
String argValue ="satish"; // value passed to the script
String exeParam = "/usr/bin/ksh "+fileName+" "+argValue;
Process proc = Runtime.getRuntime().exec(exeParam);
is = proc.getErrorStream();
iStreamReader = new InputStreamReader(is);
bReader = new BufferedReader(iStreamReader);
System.out.println("<ERROR>");
while((line = bReader.readLine()) != null)
System.out.println("Error is : "+line);
System.out.println("</ERROR>");
int exitValue = proc.waitFor();
sop("Exit Value is : "+exitValue);
catch(Exception e)
e.printStackTrace();
Now , it's showing something like..
<ERROR>
</ERROR>

Executing the top command through Java in linux

I am trying to execute the top command in Java as
Runtime.getRuntime().exec("top -n 1 >a.log");
But the command is not working in linux only through java.When i run the same command through the prompt it is working fine.Also all other commands are working fine.Is there any issue with top in linux?

flounder wrote:
Try reading [this article|http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html]. If it does not answer your problem then try seaching for other similar articles.
The cited article does provide an answer to the problem since it explains how the shell meta character '>' must be interpretted by a shell. The code as presented does not invoke a shell.

How to execute unix shell script from Java ...

Hi,
Anyone know how to execute unix shell script from Java?
Suppose I have several shell scripts written in perl or tcl or bash.
I just want to catch the output of that script.
Is there any ready to use module/object for this?
Please let me know, this is quite urgent for my study assigment.
Thanks in advance,
Regards,
me

Look up Runtime.exec()

Example: Executing a shell script from java

Hi. There are many other posts in the forums related to executing a unix script from java, but I wanted to post another example that I thought might be helpful...
The key thing to executing the script is to include the -c switch for the sh command. This tells the sh command that you are passing a string to be interpreted as input. Without this switch, the script does not execute as you'd expect it to. Also, use a string array to pass each part of the sh command.
Here is a working sample class, along with a test script to execute it:
public class TestShellScript {
public static void main(String[] args)
String[] chmod = {"chmod","777","testscript1"};
String[] runscript = {"sh","-c","./testscript1 > jdata.out"};
Runtime rtime = Runtime.getRuntime();
try
rtime.exec(chmod); // Set the authorities for testing
rtime.exec(runscript); // Run the script with redirection
catch (IOException e)
e.printStackTrace();
rtime = null;
Here is a test script to wrap the java call:
#!/bin/sh
cd /<your script dir>
export -s CLASSPATH=/<your jar dir>/TestShellScript.jar
export -s PATH=/<your script dir>:/usr/bin
java TestShellScript
- Hope this helps.

I don't know exactly but the code written below is working fine try the same with your code .Even with your code instead running the code with
" ./<filename> ",if you execute it with "sh <filename>" command without changing the mode of the file it is executing properly.
import java.io.*;
import java.util.*;
public class ScriptBuilder
public ScriptBuilder()
public void writeScript() throws java.io.IOException
FileWriter writer = new FileWriter(new File("test_script"));
writer.write("#! /bin/sh\n");
writer.write("ll>/home/faiyaz/javaprac/checkll");
writer.flush();
writer.close();
Runtime rt= Runtime.getRuntime();
rt.exec("chmod 777 test_script");
rt.exec("./test_script");
} public static void main (String[] args)throws java.io.IOException
ScriptBuilder sb = new ScriptBuilder();
sb.writeScript();
}

Executing Essbase Clear Script through FDM event scripts

Hi,
Is it possible to access and execute essbase clear script through FDM event scripts? I know one method is to modify Load action, but was wondering if can be done any other way.
Thanks in advance.

The Essbase client is installed on the FDM application server so yes. You can create a batch file that calls a calc script via the Essbase Client and execute this from your Event script

Running Unix Shell scripts through Java

How to run Unix shell scripts through Java program ?

Use:
Process p = Runtime.getRuntime().exec("sh script.sh");Then you can use:
p.getOutputStream and read the output of your program.

How we can call or execute a SHELL script through Oracle forms or Reports

How we can call or execute a SHELL script through Oracle forms or Reports.Its urgent.......

Use HOST command.

Running a shell script through java

Hi all,
I have a simple question here.
How can I run a shell script through java and put the text output into a string.
I'd be very grateful if you could show me sample code...
Have a great day,
Pesho

Runtime.exec()
There are plenty of examples. Read the following before continuing, however, as it will save alot of headaches:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

Executing a shell script from java using runtime.exec()

Hi I am trying to create a script (test_script) and execute it -- all within one java program...
the code compiles and executes perfectly but nothing happens. This is probably because the script does not get changed to the '777' mode although i am trying to do that ... any suggestions ???
//code
import java.io.*;
import java.util.*;
public class ScriptBuilder
     public ScriptBuilder() {
     public void writeScript() throws java.io.IOException{
     FileWriter writer = new FileWriter(new File("test_script"));
          writer.write("#! /bin/sh\n");
          writer.write("cd prodiags\n");
          writer.write("tar cvf delTask.tar delTask\n");
          writer.write("rm -rf delTask\n");
          writer.flush();
          writer.close();
Runtime rt= Runtime.getRuntime();
String[] cmd = new String[3];
cmd[0] = "ls";
cmd[1] = "chmod 777 test_script";
cmd[2] = "./test_script";
rt.exec(cmd);
     public static void main (String[] args)throws java.io.IOException
     ScriptBuilder sb = new ScriptBuilder();
     sb.writeScript();
}

I don't know exactly but the code written below is working fine try the same with your code .Even with your code instead running the code with
" ./<filename> ",if you execute it with "sh <filename>" command without changing the mode of the file it is executing properly.
import java.io.*;
import java.util.*;
public class ScriptBuilder
public ScriptBuilder()
public void writeScript() throws java.io.IOException
FileWriter writer = new FileWriter(new File("test_script"));
writer.write("#! /bin/sh\n");
writer.write("ll>/home/faiyaz/javaprac/checkll");
writer.flush();
writer.close();
Runtime rt= Runtime.getRuntime();
rt.exec("chmod 777 test_script");
rt.exec("./test_script");
} public static void main (String[] args)throws java.io.IOException
ScriptBuilder sb = new ScriptBuilder();
sb.writeScript();
}

Can we execution sql script through java ?

Hi All,
Can we execute sql script ("name.sql") through java programe.
I am not talking about reading sql script one by one and excute.
I just want to send this sql script to oracle console.
Or any body can give other alternative I have to lot of db operation in less time.
- Vikas Kumar Sahu

Kumar,
not sure whether this is any help, but you can try and use the code below.
I've knocked it together in about an hour so it's far from production ready (particularly, assumes one-line comments starting with '#' and nothing else - queries are assumed multi-line, but terminated by ';' the following would cause trouble:
SELECT * FROM table; SELECT *
FROM another_table;
and, of course, you can't get to the ResultSet.
But, hey, it's a start!
Best,
Marco.
(www.infinitebw.com)
admin (at) infinitebw.com
package com.ibw.database;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.sql.*;
import com.ibw.exception.DatabaseException;
public class SqlScript {
     public final static char QUERY_ENDS = ';';
     private File script;
     private Connection conn;
     private Statement stat;
     * @param args
     * @throws SQLException
     public SqlScript(String scriptFileName) throws SQLException {
          script = new File(scriptFileName);
// this is a 'custom' class, just use instead getConnection() from the
// DriverManager instead
          conn = ConnectionManager.getConn("test");
          stat = conn.createStatement();
     public static void main(String[] args) {
          try {
               SqlScript sqlScript = new SqlScript("C:/temp/myscript.sql");
               sqlScript.loadScript();
               sqlScript.execute();
          } catch (SQLException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
     protected void loadScript() throws IOException, SQLException {
          BufferedReader reader = new BufferedReader(new FileReader(script));
          String line;
          StringBuffer query = new StringBuffer();
          boolean queryEnds = false;
          while ((line = reader.readLine()) != null) {
               if (isComment(line))
                    continue;
               queryEnds = checkStatementEnds(line);
               query.append(line);
               if (queryEnds) {
                    stat.addBatch(query.toString());
                    query.setLength(0);
     private boolean isComment(String line) {
          if ((line != null) && (line.length() > 0))
               return (line.charAt(0) == '#');
          return false;
     public void execute() throws IOException, SQLException {
          stat.executeBatch();
     private boolean checkStatementEnds(String s) {
          return (s.indexOf(QUERY_ENDS) != -1);
}

Problem in executing a unix command through java

hi
i'm trying to execute unix command through java
simple shell command like "ls -l >test " but i'm not able to see the result.
there are no error messages.
Code is:
import java.lang.Runtime.*;
class ExecDemo
     public static void main(String[] args)
          Runtime r=Runtime.getRuntime();
          Process p=null;
          try
               p=r.exec("ls -l > test");
          catch (Exception e)
               System.out.println("Error executing nedit.");
}can anyone help please.

get the the inputStream of the runtime object after executing the command.
now use the readLine() function until it becomes null.
egs: with reference to ur code.
InputStream is=p.getInputStream()
while(is!=null)
String s=is.readLine();
if the command don't execute try giving the full path also like /sbin/ls -l

Trying to execute a python script through java

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