....
dockerClient.startContainerCmd(containerId).exec();


System.out.println("----------------------------------------------");
String[] cmdArgs = new String[] { "java", "-cp", "/codeStore", "Main"};
var execCreateCmdResponse = dockerClient.execCreateCmd(containerId)
		.withCmd(cmdArgs)
		.withAttachStdin(true)
		.withAttachStdout(true)
		.withAttachStderr(true)
		.exec();
System.out.println("----------------------------------------------");
System.out.println( execCreateCmdResponse.getRawValues());


var execStartResultCallback = new ExecStartResultCallback() {
	@Override
	public void onNext(Frame frame) {
		if (frame.getStreamType() == StreamType.STDERR) {
			System.out.println( new String(frame.getPayload()));
		} else {
			System.out.println(new String(frame.getPayload()));
		}
		super.onNext(frame);
	}
};

String inputString = "2 5\n1 2\n2 4";

byte[] inputBytes = inputString.getBytes(StandardCharsets.UTF_8);

InputStream inputStream = new ByteArrayInputStream(inputBytes);

try {
	dockerClient.execStartCmd(execCreateCmdResponse.getId())
			.withStdIn(inputStream)
			.exec(execStartResultCallback)
			.awaitCompletion();
} catch (InterruptedException e) {
	e.printStackTrace();
}