java runtime exec get output
private static void execCommand() {
String[] command = {"echo", "Hello", "world."};
new Thread(() -> {
try {
ProcessBuilder builder = new ProcessBuilder(command);
builder.redirectErrorStream(true);
final Process proc = builder.start();
BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream()));
String s = null;
while ((s = in.readLine()) != null) {
System.out.println(s);
}
} catch (IOException e) {
e.printStackTrace();
}
}).start();
}