Develop Reference

Java switch directories and then fire command with parameters

Hey all I am trying to change directories and then run my command with parameters.
final String path = "\\Local// Apps\\IBM\\SDP\\scmtools\\eclipse";
final String command = "scm help";
final String dosCommand = "cmd /c \"" + path + "\"" + command;
final Process process = Runtime.getRuntime().exec(dosCommand);
final InputStream in = process.getInputStream();
int ch;
while((ch = in.read()) != -1) {
System.out.print((char)ch);
}
It runs without errors but outputs nothing. However, this is what shows up after it finishes:
<terminated, exit value: 0>C:\Local Apps\IBM\SDP\jdk\bin\javaw.exe (Jul 22, 2019, 11:21:37 AM)
The expected output should be:
So am I doing this correctly?
AS suggested by Andreas
Process p = null;
ProcessBuilder pb = new ProcessBuilder("scm.exe");
pb.directory(new File("C:/Local Apps/IBM/SDP/scmtools/eclipse"));
p = pb.start();
I get the following error:
Cannot run program "scm.exe" (in directory "C:\Local Apps\IBM\SDP\scmtools\eclipse"): CreateProcess error=2, The system cannot find the file specified

You should use ProcessBuilder instead of Runtime.exec, e.g.
Process proc = new ProcessBuilder("scm.exe", "help")
.directory(new File("C:\\Local Apps\\IBM\\SDP\\scmtools\\eclipse"))
.inheritIO()
.start();
proc.waitFor(); // optional
You can also go through the command interpreter if needed, e.g. if the command is a script (.bat or .cmd file):
Process proc = new ProcessBuilder("cmd", "/c", "scm", "help")
.directory(new File("C:\\Local Apps\\IBM\\SDP\\scmtools\\eclipse"))
.inheritIO()
.start();
proc.waitFor();
The inheritIO() means that you don't need to process the commands output. It will be sent to the console, or wherever Java's own output would go.

Run bat file from different disk with java

Im trying to run a bat from C:/abc/def/coolBat.bat but my java workspace is in D:/
I've tried with :
String cmd = "cmd /c /start C:/abc/def/coolBat.bat";
Runtime.getRuntime().exec(cmd);
But didn't work, so I tried this
String[] command = { "cmd.exe", "/C", "C:/abc/def/coolBat.bat" };
Runtime.getRuntime().exec(cmd);
didnt work either. Tried this too
Executor exec = new DefaultExecutor();
exec.setWorkingDirectory(new File("C:/abc/def"));
CommandLine cl = new CommandLine("coolBat.bat");
int exitvalue = exec.execute(cl);
Says it cant find the file.
Tried something like this too:
Runtime.getRuntime().exec("cmd cd /d C:/abc/def/ && coolBat.bat");
And nothing. The weird thing is that this command:
cd /d C:/abc/def/ && coolBat.bat
Works when i do it in cmd. Its worth saying that the bat file copies some files to another directory, all inside C:/
EDITED N°1
CD C:\abc\def\MN
copy almn + ctmn + bamn C:\abc\def\mn_sf.txt
CD C:\abc\def\ME
copy alme + ctme + bame C:\abc\def\me_sf.txt
CD C:\abc\def\
if exist MN.txt del MN.txt
if exist ME.txt del ME.txt
if exist JUZ.txt del JUZ.txt
if exist FUNC.txt del FUNC.txt
if exist AHO.txt del AHO.txt
CD C:\

Allow MS Windows to use the associated application to run your batch file (or any other application):
Required Imports:
import java.awt.Desktop;
Here is code you can try:
String filePath = "C:/abc/def/coolBat.bat";
if (Desktop.isDesktopSupported()) {
try {
File myFile = new File(filePath);
Desktop.getDesktop().open(myFile);
}
catch (IOException | IllegalArgumentException ex) {
System.err.println("Either there is no application found "
+ "which is associatd with\nthe file you want to work with or the "
+ "file doesn't exist!\n\n" + filePath);
}
}

Well I finally got it to work, just had to change my workspace to C:/
Apparently the problem was that it couldn't change from D:/ to C:/ to execute. I ran the same commands I tried before and there was no problem.
Guess the question remains, why it couldn't change from D:/ to C:/ when running commands from Java.
Thanks to everyone for the help

The Java version could work as:
String[] command = {"cmd.exe", "/C", "Start", "/D", "c:\\abc\\def", "c:\\abc\\def\\coolBat.bat"};
Process process = Runtime.getRuntime().exec(command);
BufferedReader input = new BufferedReader(new InputStreamReader(process.getInputStream()));
while ((line = input.readLine()) != null) {
System.out.println(line);
}
input.close();
BufferedReader errReader = new BufferedReader(new InputStreamReader(process.getErrorStream()));
while ((line = errReader.readLine()) != null) {
System.out.println(line);
}
System.out.flush();
int retCode = process.waitFor();
System.out.println("Return code: " + retCode);

Try this:
String[] command = { "cmd.exe", "/C", "C: && C:/abc/def/coolBat.bat" };

Unable to close cmd console automatically after excution from java

I'm creating batch file using java and Running the same..
It creates successfully and runs as well..
But after execution , the window cmd prompt doesn't close ..
And if i using
taskkill /f /im cmd.exe
it doesn't allow the complete execution.
How to close the cmd once the execution is completed..??
Any Help would be appreciated...
Runtime rt= Runtime.getRuntime();
rt.exec("cmd /c start "+serverPath+"SCA_"+projComp.getModule()+"_"+projComp.getProjectName()+"_"+projComp.getInside().get(i).getRuleSetName()+".bat", null, new File(serverPath+"MES/SERVER/MOS-ACI"));

You can create your bat file like that:
#echo off
cd //my command
exit
So you can execute your bat file like that:
public static void main(String[] args) {
try {
ProcessBuilder builder = new ProcessBuilder("cmd.exe", "/c", "start Path-to-your-bat-file\\commandBAT.bat");
builder.redirectErrorStream(true);
Process p = builder.start();
BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while (true) {
line = r.readLine();
if (line == null) {
break;
}
System.out.println(line);
}
} catch (Exception e) {
System.out.println("Exception = " + e);
}
}

Java open cmd and execute command using ProcessBuilder

I'm trying to make an ide just for fun I have no idea why but i wan't to open cmd and execute 2 commands 1 for compiling and 1 for running the compiled file.
This is how my processbuilder looks like:
ProcessBuilder process = new ProcessBuilder("cmd.exe", "/c", "start", "/k", "javac", "EkkoFunIde.java", "java", "EkkoFunIde.class");
But nothing happens no excepetions are thrown but when i only have this:
ProcessBuilder process = new ProcessBuilder("cmd.exe", "/c", "start");
It does open cmd.
I write to the file like this:
ObservableList<CharSequence> paragraph = area.getParagraphs();
Iterator<CharSequence> iter = paragraph.iterator();
try {
BufferedWriter bf = new BufferedWriter(new FileWriter(file));
while(iter.hasNext()) {
CharSequence seq = iter.next();
bf.append(seq);
bf.newLine();
}
bf.flush();
bf.close();
} catch (Exception e) {
e.printStackTrace();
}
And after the process has started i delete the file.

Your forgot to call start method (example at the top of article about ProcessBuilder class):
...
process.start();

bat file does not start and bat file is in a folder

I am trying to launch a bat file. The bat file is in a folder. The folder contains all the executable jar file. I tried this code to launch the bat file but unable.
ProcessBuilder pb = new ProcessBuilder( "C:\\Users\\user\\Desktop\\NetBeansProjects\\Genomic DataWarehouse Project\\biodwh.startBioDWH.bat" );
pb.redirectErrorStream(true);
Process p = pb.start();
InputStream is = p.getInputStream();
BufferedReader br = new BufferedReader( new InputStreamReader( is ) );
for ( String line = br.readLine(); line != null; line = br.readLine() )
{
System.out.println( ">" + line );
}
p.waitFor();

try use this Runtime.getRuntime().exec("cmd /c start C:\Users\user\Desktop\NetBeansProjects\Genomic DataWarehouse Project\biodwh.startBioDWH.bat");

in your .bat add the line pushd %~dp0
this will change the current drive and path to the one of the bat file.

Ok, seems I misunderstood the question.
I think you can't execute batch files directly but need to launch it using cmd.exe. Try adding cmd /c (with a space at the end) to your new ProcessBuilder line :
ProcessBuilder pb = new ProcessBuilder( "cmd /c C:\\Users\\user\\Desktop\\NetBeansProjects\\Genomic DataWarehouse Project\\biodwh.startBioDWH.bat" );
Or ou can try to execute the bat file this way :
String path="C:\\Users\\user\\Desktop\\NetBeansProjects\\Genomic DataWarehouse Project\\";
File dir = new File(path);
Process process = Runtime.getRuntime().exec("cmd /c "+path+"biodwh.startBioDWH.bat", null, dir);
Or you can make it shorter if you don't need the batch file to be executed from the folder where it resides
Process process = Runtime.getRuntime().exec("cmd /c C:\\Users\\user\\Desktop\\NetBeansProjects\\Genomic DataWarehouse Project\\biodwh.startBioDWH.bat");