The easiest call of the ProcessBuilder

EasiestCallOfProcessBuilder.java

ProcessBuilder pb = new ProcessBuilder("ls", "-al");
pb.directory(Paths.get("/tmp").toFile());
pb.redirectErrorStream(true);
Process process = pb.start();
try (var infoStream = process.getInputStream()) {
    infoStream.transferTo(System.out);
}
int exitCode = process.waitFor();
if(exitCode == 0)
    System.out.println("Command successful processed.");
else
    System.out.println("Command stops with exit-code: " + exitCode);