Hi,
if I understand that correctly you would like to get some keyboard input
for your child process - I have never done that but I think the
following snippet from DefaultExecutorTest might show you the way
Cheers,
Siegfried Goeschl
/**
* The test script reads an argument from <code>stdin<code> and prints
* the result to stdout. To make things slightly more interesting
* we are using an asynchronous process.
*
* @throws Exception the test failed
*/
public void testStdInHandling() throws Exception {
ByteArrayInputStream bais = new
ByteArrayInputStream("Foo".getBytes()); // newline not needed; causes
problems for VMS
CommandLine cl = new CommandLine(this.stdinSript);
PumpStreamHandler pumpStreamHandler = new PumpStreamHandler(
this.baos, System.err, bais);
DefaultExecuteResultHandler resultHandler = new
DefaultExecuteResultHandler();
Executor executor = new DefaultExecutor();
executor.setStreamHandler(pumpStreamHandler);
executor.execute(cl, resultHandler);
resultHandler.waitFor(WAITFOR_TIMEOUT);
assertTrue("ResultHandler received a result",
resultHandler.hasResult());
assertFalse(exec.isFailure(resultHandler.getExitValue()));
String result = baos.toString();
assertTrue("Result '"+result+"' should contain 'Hello Foo!'",
result.indexOf("Hello Foo!") >= 0);
}
On 27.09.11 09:41, Yi Huang wrote:
For example:
import java.util.Scanner;
public class ToBeCalled {
public static void main(String[] args) {
Scanner keyboard = new Scanner(System.in);
int t = keyboard.nextInt();
System.out.println(t);
}
}
How could I use exec to let it run properly?
I have tried this:
// compile
cmdline = CommandLine.parse("javac");
executor = new DefaultExecutor();
cmdline.addArgument("ToBeCalled.java");
exitValue = executor.execute(cmdline);
System.out.println("compile: " + exitValue);
// run
cmdline = CommandLine.parse("java");
cmdline.addArgument("ToBeCalled");
cmdline.addArgument("abc");
cmdline.addArgument("def");
executor = new DefaultExecutor();
exitValue = executor.execute(cmdline);
System.out.println("run: " + exitValue);
It did compile, but crashed and said that there is no argument in nextInt()
How could I fix that?
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