How to Get a List of Current Open Processes with Java?

This is a simple Java Program which grabs all running Process on system and prints each process line by line.

We will use class Runtime. Every Java application has a single instance of class Runtime that allows the application to interface with the environment in which the application is running. The current runtime can be obtained from the getRuntime method.

An application cannot create its own instance of this class.

Note: we are using command ps -few to grab all processes.

package com.crunchify.tutorials;

import java.io.BufferedReader;
import java.io.InputStreamReader;

/**
 * @author Crunchify.com
 * 
 */

public class CrunchifySystemProcess {
	public static void main(String[] args) {
		try {
			String process;
			// getRuntime: Returns the runtime object associated with the current Java application.
			// exec: Executes the specified string command in a separate process.
			Process p = Runtime.getRuntime().exec("ps -few");
			BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
			while ((process = input.readLine()) != null) {
				System.out.println(process); // <-- Print all Process here line
												// by line
			}
			input.close();
		} catch (Exception err) {
			err.printStackTrace();
		}
	}
}

Windows command:

System.getenv("windir") +"\\system32\\"+"tasklist.exe /fo csv /nh"

Output:

  UID   PID  PPID   C STIME   TTY           TIME CMD
    0     1     0   0 18Sep13 ??         6:43.95 /sbin/launchd
    0    11     1   0 18Sep13 ??         0:07.98 /usr/libexec/UserEventAgent (System)
    0    12     1   0 18Sep13 ??         0:07.13 /usr/libexec/kextd
    0    14     1   0 18Sep13 ??         0:38.41 /usr/sbin/notifyd
    0    15     1   0 18Sep13 ??         1:10.88 /usr/sbin/securityd -i
    0    16     1   0 18Sep13 ??         0:01.90 /usr/sbin/diskarbitrationd
    0    17     1   0 18Sep13 ??         3:46.28 /usr/libexec/configd
    0    18     1   0 18Sep13 ??         2:45.31 /System/Library/CoreServices/powerd.bundle/powerd
    0    19     1   0 18Sep13 ??         0:18.40 /usr/sbin/syslogd
    0    20     1   0 18Sep13 ??         0:49.48 /usr/sbin/distnoted daemon
    0    21     1   0 18Sep13 ??         0:29.08 /usr/sbin/cfprefsd daemon
    0    31     1   0 18Sep13 ??         1:02.99 /System/Library/CoreServices/coreservicesd
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