I recently ran into this problem and just wanted to mention that since java 7 the process builder api has been expanded. This problem can now be solved with: ProcessBuilder pb = new ProcessBuilder(“yourcommand”); pb.redirectOutput(Redirect.INHERIT); pb.redirectError(Redirect.INHERIT); Process p = pb.start();
Since the API documentation makes no mention of thread safety on the System.out object nor does the PrintStream#println(String) method you cannot assume that it is thread-safe. However, it is entirely possible that the underlying implementation of a particular JVM uses a thread-safe function for the println method (e.g. printf on glibc) so that, in reality, … Read more
Use a ByteArrayOutputStream as a buffer: import java.io.ByteArrayOutputStream; import java.io.PrintStream; import java.nio.charset.StandardCharsets; final ByteArrayOutputStream baos = new ByteArrayOutputStream(); final String utf8 = StandardCharsets.UTF_8.name(); try (PrintStream ps = new PrintStream(baos, true, utf8)) { yourFunction(object, ps); } String data = baos.toString(utf8);
This might sound flippant, but PrintStream prints to an OutputStream, and PrintWriter prints to a Writer. Ok, I doubt I’ll get any points for stating the obvious. But there’s more. So, what is the difference between an OutputStream and a Writer? Both are streams, with the primary difference being a OutputStream is a stream of … Read more