Process API Improvements

In Java, 9 Process API which is responsible for powering and managing operating system operation has been upgraded considerably. ProcessHandle Class now gives the process's native process ID, initial time, accumulated CPU time, arguments, command, user, parent process, and descendants. ProcessHandle Class issues methods to check processes liveness and to demolish processes. It has an Exit method; the CompletableFuture class can carry out measures asynchronously when the process exits.

Tester.java

import java.time.ZoneId;
import java.util.stream.Stream;
import java.util.stream.Collectors;
import java.io.IOException;

public class Tester {
   public static void main(String[] args) throws IOException {
      ProcessBuilder pb = new ProcessBuilder("notepad.exe");
      String np = "Not Present";
      Process p = pb.start();
      ProcessHandle.Info info = p.info();
      System.out.printf("Process ID : %s%n", p.pid());
      System.out.printf("Command name : %s%n", info.command().orElse(np));
      System.out.printf("Command line : %s%n", info.commandLine().orElse(np));

      System.out.printf("Start time: %s%n",
         info.startInstant().map(i -> i.atZone(ZoneId.systemDefault())
         .toLocalDateTime().toString()).orElse(np));

      System.out.printf("Arguments : %s%n",
         info.arguments().map(a -> Stream.of(a).collect(
         Collectors.joining(" "))).orElse(np));

      System.out.printf("User : %s%n", info.user().orElse(np));
   } 
}

Output

You will get the result like:

Process ID : 5800
Command name : C:\Windows\System32\notepad.exe
Command line : Not Present
Start time: 2017-11-04T21:35:03.626
Arguments : Not Present
User: administrator