Question

I am trying to use java to run a batch file at an absolute location. The batch file will compile a couple of java files.

Here is the code which I have been trying:

String s=file.getAbsolutePath() + "\\compile.bat";
Runtime rut = Runtime.getRuntime();
try {
    rut.exec(new String[] {file.getAbsolutePath() + "\\compile.bat"});
}catch(IOException e1) {
    e1.printStackTrace();
}
System.out.println(s);

Now, when this code gets executed, I get no console errors, but the batch file is not run. When I run the batch file through Windows Explorer, however, the batch file works, compiles the files and closes when done.

Answer 1

How do you know that there were no console errors?

Try this:

String s=file.getAbsolutePath() + "\\compile.bat";
Runtime rut = Runtime.getRuntime();
try {
    Process process = rut.exec(new String[] {file.getAbsolutePath() + "\\compile.bat"});
    // prints out any message that are usually displayed in the console
    Scanner scanner = new Scanner(process.getInputStream());
    while (scanner.hasNext()) {
        System.out.println(scanner.nextLine());
    }
}catch(IOException e1) {
    e1.printStackTrace();
}
System.out.println(s);