try{
//String[] cmd = new String[]{"/bin/sh", "send.sh"};
//Process pr = Runtime.getRuntime().exec(cmd); //nothing happens
//Process p = Runtime.getRuntime().exec("send.sh"); //File not found
//Process p = Runtime.getRuntime().exec("bash send.sh"); //nothing happens
// ProcessBuilder pb = new ProcessBuilder("bash","send.sh");
// Process p = pb.start(); //nothing happens
}
catch(Throwable t)
{
t.printStackTrace();
}
With this code I am trying to start a simple bash file which is located in the directory of the program. The code of the bash file works when I start it with shell or by simply executing it. The code of the bash file works.
I've tried every option but they are all not working. I've commented what happens in each case. I don't understand that it don't find the file because the bash file is located in the same directory.
You don't see an output for two reasons:
You don't wait for a process to finish
You don't redirect it's output to the same console that your Java process runs
And, probably, you need to use a command like /bin/bash -c path/to/your/file.sh. Note that -c flag.
IMHO, the best way to craft and execute external processes in Java is java.lang.ProcessBuilder.
Supposing that you have your sh file somewhere the in resources directory, here is an example main class:
public class App {
public static void main(String[] args) throws Exception {
final ProcessBuilder processBuilder = new ProcessBuilder("/bin/bash", "-c", App.class.getResource("/46964369.sh").getPath());
processBuilder.redirectInput(Redirect.INHERIT);
processBuilder.redirectOutput(Redirect.INHERIT);
processBuilder.redirectError(Redirect.INHERIT);
processBuilder.start().waitFor();
}
}
Note that I redirect process's streams with redirect* methods. Redirect.INHERIT redirects stream to the corresponding stream of the JVM instance. It works both for input and output streams. Finally, I am waiting for a process to finish with waitFor() method. In fact, you can do more, like capturing the output into a string, providing input from a string or running the process asynchronously, but this is a minimal example.
If you store your sh file in another place, you must update path-related logic.
Take a look at the complete example here. It's a Gradle project, and you can use ./gradlew run to execute it:
$ ./gradlew run
:compileJava
:processResources
:classes
:run
Hello, world!
BUILD SUCCESSFUL in 4s
3 actionable tasks: 3 executed
In my Java application, I want to run a batch file that calls "scons -Q implicit-deps-changed build\file_load_type export\file_load_type"
It seems that I can't even get my batch file to execute. I'm out of ideas.
This is what I have in Java:
Runtime.
getRuntime().
exec("build.bat", null, new File("."));
Previously, I had a Python Sconscript file that I wanted to run but since that didn't work I decided I would call the script via a batch file but that method has not been successful as of yet.
Batch files are not an executable. They need an application to run them (i.e. cmd).
On UNIX, the script file has shebang (#!) at the start of a file to specify the program that executes it. Double-clicking in Windows is performed by Windows Explorer. CreateProcess does not know anything about that.
Runtime.
getRuntime().
exec("cmd /c start \"\" build.bat");
Note: With the start \"\" command, a separate command window will be opened with a blank title and any output from the batch file will be displayed there. It should also work with just `cmd /c build.bat", in which case the output can be read from the sub-process in Java if desired.
Sometimes the thread execution process time is higher than JVM thread waiting process time, it use to happen when the process you're invoking takes some time to be processed, use the waitFor() command as follows:
try{
Process p = Runtime.getRuntime().exec("file location here, don't forget using / instead of \\ to make it interoperable");
p.waitFor();
}catch( IOException ex ){
//Validate the case the file can't be accesed (not enought permissions)
}catch( InterruptedException ex ){
//Validate the case the process is being stopped by some external situation
}
This way the JVM will stop until the process you're invoking is done before it continue with the thread execution stack.
Runtime runtime = Runtime.getRuntime();
try {
Process p1 = runtime.exec("cmd /c start D:\\temp\\a.bat");
InputStream is = p1.getInputStream();
int i = 0;
while( (i = is.read() ) != -1) {
System.out.print((char)i);
}
} catch(IOException ioException) {
System.out.println(ioException.getMessage() );
}
ProcessBuilder is the Java 5/6 way to run external processes.
To run batch files using java if that's you're talking about...
String path="cmd /c start d:\\sample\\sample.bat";
Runtime rn=Runtime.getRuntime();
Process pr=rn.exec(path);`
This should do it.
The executable used to run batch scripts is cmd.exe which uses the /c flag to specify the name of the batch file to run:
Runtime.getRuntime().exec(new String[]{"cmd.exe", "/c", "build.bat"});
Theoretically you should also be able to run Scons in this manner, though I haven't tested this:
Runtime.getRuntime().exec(new String[]{"scons", "-Q", "implicit-deps-changed", "build\file_load_type", "export\file_load_type"});
EDIT: Amara, you say that this isn't working. The error you listed is the error you'd get when running Java from a Cygwin terminal on a Windows box; is this what you're doing? The problem with that is that Windows and Cygwin have different paths, so the Windows version of Java won't find the scons executable on your Cygwin path. I can explain further if this turns out to be your problem.
Process p = Runtime.getRuntime().exec(
new String[]{"cmd", "/C", "orgreg.bat"},
null,
new File("D://TEST//home//libs//"));
tested with jdk1.5 and jdk1.6
This was working fine for me, hope it helps others too.
to get this i have struggled more days. :(
I had the same issue. However sometimes CMD failed to run my files.
That's why i create a temp.bat on my desktop, next this temp.bat is going to run my file, and next the temp file is going to be deleted.
I know this is a bigger code, however worked for me in 100% when even Runtime.getRuntime().exec() failed.
// creating a string for the Userprofile (either C:\Admin or whatever)
String userprofile = System.getenv("USERPROFILE");
BufferedWriter writer = null;
try {
//create a temporary file
File logFile = new File(userprofile+"\\Desktop\\temp.bat");
writer = new BufferedWriter(new FileWriter(logFile));
// Here comes the lines for the batch file!
// First line is #echo off
// Next line is the directory of our file
// Then we open our file in that directory and exit the cmd
// To seperate each line, please use \r\n
writer.write("cd %ProgramFiles(x86)%\\SOME_FOLDER \r\nstart xyz.bat \r\nexit");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
// Close the writer regardless of what happens...
writer.close();
} catch (Exception e) {
}
}
// running our temp.bat file
Runtime rt = Runtime.getRuntime();
try {
Process pr = rt.exec("cmd /c start \"\" \""+userprofile+"\\Desktop\\temp.bat" );
pr.getOutputStream().close();
} catch (IOException ex) {
Logger.getLogger(MainFrame.class.getName()).log(Level.SEVERE, null, ex);
}
// deleting our temp file
File databl = new File(userprofile+"\\Desktop\\temp.bat");
databl.delete();
The following is working fine:
String path="cmd /c start d:\\sample\\sample.bat";
Runtime rn=Runtime.getRuntime();
Process pr=rn.exec(path);
This code will execute two commands.bat that exist in the path C:/folders/folder.
Runtime.getRuntime().exec("cd C:/folders/folder & call commands.bat");
import java.io.IOException;
public class TestBatch {
public static void main(String[] args) {
{
try {
String[] command = {"cmd.exe", "/C", "Start", "C:\\temp\\runtest.bat"};
Process p = Runtime.getRuntime().exec(command);
} catch (IOException ex) {
}
}
}
}
To expand on #Isha's anwser you could just do the following to get the returned output (post-facto not in rea-ltime) of the script that was run:
try {
Process process = Runtime.getRuntime().exec("cmd /c start D:\\temp\\a.bat");
System.out.println(process.getText());
} catch(IOException e) {
e.printStackTrace();
}
I am in the progress of learning perl language.
I have made a simple perl script (as shown as below).
#!/usr/bin/perl
use strict;
use warnings;
print "hi Lala\n";
I am trying to run this script in NetBean using java language.
My code is as below:
public class javaProgram {
public static void main(String[] args) {
Process process;
try
{
String testFile = "perl C:\\Strawberry\\perl_tests\\hello_world.pl";
process = Runtime.getRuntime().exec(testFile);
process.getOutputStream();
process.waitFor();
if(process.exitValue() == 0)
{
System.out.println("Command Successful");
}
else
{
System.out.println("Command Failure");
}
}
catch(Exception e)
{
System.out.println("Exception: "+ e.toString());
}
}
}
But I got this error
Exception: java.io.IOException: Cannot run program "perl C:\Strawberry\perl_tests\hello_world.pl": CreateProcess error=2, The system cannot find the file specified
I have save the script as hello_world.pl in the directory as shown above. So, I am not sure what I am doing wrong.
Is it NetBean problem? The script problem? But when I run the script using Strawberry IDE, there is no problem or errors.
perl is not found.
in your script you are refer to #!/usr/bin/perl wich is not existence in a Windows path. So you have to add the complete path to perl Interpreter.
String testFile = "<path_to_perl>perl C:\\Strawberry\\perl_tests\\hello_world.pl";
Also add the correct path in your perl script:
#!<path_to_perl>perl
use strict;
use warnings;
print "hi Lala\n";
The following method starts the cmd in Windows and it takes a parameter of the command which need to be run.
I have tested this method using the following commands: net users and it worked fine and it printed the users accounts. but if I run the dir command I get the following error:
java.io.IOEXception:
Cannot run program "dir": CreateProcess error=2, The system cannot find the file specified (in java.lang.ProcessBuilder)
Code :
private String commandOutPut;
public void startCommandLine(String s) throws IOException{
Runtime runtime = Runtime.getRuntime();
Process process = runtime.exec(s); // you might need the full path
InputStream is = process.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String commandOutPut;
while ((commandOutPut = br.readLine()) != null) {
this.commandOutPut = this.commandOutPut + "\n" + commandOutPut;
}
System.out.println(this.commandOutPut);
}
Well, obviously, your method does not start cmd. How did you get this notion?
The net command is a standalone command so it runs just fine, but the dir command is not standalone, it is an internal command of cmd.exe, so you cannot run it without launching cmd.exe to execute it.
To get it to work you will have to pass not dir but cmd.exe /c dir or something like that.
Don't know if this perception can help you. But, seems that "net users" are recognized as Windows command, since "Execute" dialog can run it.
But, for some reason, the "dir" command aren't. When try to run, Windows responds that command was not found.
Additionaly, I tried run Command with inline arguments too, but the arguments are simply ignored. (sorry for bad english)
My best guess is that this is because "net" is a real executable (there is a file WINDIR\System32\net.exe"), while "dir" is a builtin command of the command interpreter - it has no executable and is directly executed within cmd.exe.
Howevever you may get around this be invoking "dir" command inside the cmd process. The syntax - as per Microsoft docs - is:
cmd /c dir
There are also some related answers on the site:
How to execute cmd commands via Java
Run cmd commands through java
You can use the following code for this
import java.io.*;
public class demo
{
public static void main(String args[])
{
try
{
Process pro=Runtime.getRuntime().exec("cmd /c dir");
pro.waitFor();
BufferedReader redr=new BufferedReader(
new InputStreamReader(pro.getInputStream())
);
String ln;
while((ln = redr.readLine()) != null)
{
System.out.println(ln);
}
}
catch(Exception e) {}
System.out.println("Done");
}
}
i am new to this Process Thing in java and i am having a problem with this shell command that i want to run in java.
I have this file with a large set of data in it and i want to convert it using XSL.
The command is working fine if run on cmd.exe but is not working in java code.
I have used the process wait too but still there is no output. Please help.
Thanks
Small fragment of code
String c="java -Xmx1g -jar c:\\temp\\FileConverter.jar xmlTransform title \"Data\" root \"c:\\temp\\\" src \"c:\\temp\\input.xml\" xsl \"converter.xsl\" xsl:MEMBER_CODE \"111\" xsl:MEMBER_NAME \"ABC\" xsl:MEMBER_PASSWORD \"abc\" dst \"c:\\temp\\dummy.xml\" src-error \"c:\\temp\\error\"";
Runtime rt = Runtime.getRuntime();
try {
Process proc = rt.exec(c);
synchronized (proc) {
proc.wait(10000);
}
System.out.println("Done");
}catch (IOException e) {
e.printStackTrace();
}