I use the following code, for redirecting the output of a process I launch from my Java app:
ProcessBuilder builder = new ProcessBuilder("MyProcess.exe");
builder.redirectOutput(Redirect.INHERIT);
builder.redirectErrorStream(true);
Now, this works fine when I run the code from eclipse - I can see the output in Eclipse's console.
Yet when I create a jar file and run it from a cmd window, e.g. java -jar MyJar.jar, it doesn't print the output of the process. What could be the reason for this?
I know I'm late in answering, but I came across this question before coming across the answer, and wanted to save anybody else in the same boat some searching.
This is actually a known bug for Windows: https://bugs.openjdk.java.net/browse/JDK-8023130
You can get around it by redirecting the streams yourself:
Process p = pb.start();
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
while ((line = br.readLine()) != null) {
System.out.println(line);
}
p.waitFor();
br.close();
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