The following is a brief exploration of ways in which command line arguments can be called in a java program, first by setting a 'Runtime' variable, then executing an argument (String) with this variable as a process. A useful list of arguments is also provided right at the end for those who want to experiment.
public static void main(String[] args) throws IOException {
try
{
Runtime rt = Runtime.getRuntime();
String cmdString = "cmd /c label e:ThisDrive";
Process pr = rt.exec(cmdString);
}
catch (Exception e)
{
System.out.println(e.toString());
e.printStackTrace();
}
}
}
This block of code renames whatever drive is connected to E:/ to 'ThisDrive'. The following example shows a method to obtain information about the system in use, & any processes which are currently running, in the style of Windows task manager :
public static void main(String args[]) throws AWTException, IOException
{
try
{
Runtime rt = Runtime.getRuntime();
String cmdString = "cmd /c hostname";
System.out.println("Hostname: ");
Process pr = rt.exec(cmdString);
BufferedReader input = new BufferedReader(new InputStreamReader(
pr.getInputStream()));
String line = null;
while ((line = input.readLine()) != null)
{
System.out.println(line);
}
}
catch (Exception e)
{
System.out.println(e.toString());
e.printStackTrace();
}
try
{
Runtime rt = Runtime.getRuntime();
String cmdString = "cmd /c whoami";
System.out.println("\nUser: ");
Process pr = rt.exec(cmdString);
BufferedReader input = new BufferedReader(new InputStreamReader(
pr.getInputStream()));
String line = null;
while ((line = input.readLine()) != null)
{
System.out.println(line);
}
}
catch (Exception e)
{
System.out.println(e.toString());
e.printStackTrace();
}
try
{
Runtime rt = Runtime.getRuntime();
String cmdString = "cmd /c date /t";
System.out.println("\nSystem Date: ");
Process pr = rt.exec(cmdString);
BufferedReader input = new BufferedReader(new InputStreamReader(
pr.getInputStream()));
String line = null;
while ((line = input.readLine()) != null)
{
System.out.println(line);
}
}
catch (Exception e)
{
System.out.println(e.toString());
e.printStackTrace();
}
try
{
Runtime rt = Runtime.getRuntime();
String cmdString = "cmd /c tasklist";
System.out.println("\nCurrent Tasks: ");
Process pr = rt.exec(cmdString);
BufferedReader input = new BufferedReader(new InputStreamReader(
pr.getInputStream()));
String line = null;
while ((line = input.readLine()) != null)
{
System.out.println(line);
}
}
catch (Exception e)
{
System.out.println(e.toString());
e.printStackTrace();
}
}
The first block here runs a command line argument asking for the name of the current System & returns it. Next, the username is called for & returned, then the current date & finally a list of system processes. The output will look akin to this :
run:
Hostname:
John
User:
John/ Vitrus
System Date:
10/02/2015
Current Tasks:
Image Name PID Session Name Session# Mem Usage
========================= ======== ================ =========== ============
System Idle Process 0 Services 0 4 K
System 4 Services 0 17,096 K
smss.exe 320 Services 0 472 K
csrss.exe 556 Services 0 2,860 K
wininit.exe 636 Services 0 2,248 K
services.exe 744 Services 0 4,276 K
lsass.exe 764 Services 0 8,956 K
svchost.exe 832 Services 0 9,472 K
svchost.exe 876 Services 0 6,136 K
svchost.exe 988 Services 0 15,412 K
svchost.exe 240 Services 0 38,728 K
svchost.exe 364 Services 0 11,720 K
igfxCUIService.exe 584 Services 0 2,140 K
svchost.exe 660 Services 0 76,292 K
svchost.exe 768 Services 0 12,072 K
spoolsv.exe 1220 Services 0 10,308 K
svchost.exe 1264 Services 0 18,152 K
dasHost.exe 1384 Services 0 6,568 K
HeciServer.exe 1424 Services 0 1,028 K
Service.exe 1508 Services 0 1,612 K
mfevtps.exe 1532 Services 0 3,336 K
NitroPDFDriverService9x64 1564 Services 0 568 K
NLSSRV32.EXE 1596 Services 0 60 K
RichVideo64.exe 1660 Services 0 1,104 K
svchost.exe 1708 Services 0 7,256 K
McAPExe.exe 1780 Services 0 652 K
mcshield.exe 1820 Services 0 152,424 K
mfefire.exe 1900 Services 0 3,428 K
McSvHost.exe 1956 Services 0 28,020 K
svchost.exe 2184 Services 0 2,264 K
WUDFHost.exe 2432 Services 0 2,756 K
svchost.exe 2932 Services 0 5,232 K
CltMngSvc.exe 2964 Services 0 2,904 K
McCSPServiceHost.exe 2544 Services 0 4,828 K
SearchIndexer.exe 1244 Services 0 28,884 K
PresentationFontCache.exe 2440 Services 0 2,140 K
GoogleCrashHandler.exe 1516 Services 0 868 K
GoogleCrashHandler64.exe 3392 Services 0 132 K
WmiPrvSE.exe 5624 Services 0 12,712 K
csrss.exe 5748 Console 7 35,048 K
winlogon.exe 6024 Console 7 4,736 K
dwm.exe 4192 Console 7 23,448 K
cltmng.exe 5212 Console 7 29,220 K
cltmngui.exe 5980 Console 7 10,980 K
taskhostex.exe 2312 Console 7 9,712 K
McUICnt.exe 5372 Console 7 33,696 K
explorer.exe 3196 Console 7 68,696 K
igfxHK.exe 5204 Console 7 8,236 K
igfxTray.exe 5336 Console 7 9,484 K
igfxEM.exe 6112 Console 7 10,664 K
taskhost.exe 1148 Console 7 5,908 K
SkyDrive.exe 3356 Console 7 13,636 K
chrome.exe 5420 Console 7 142,224 K
chrome.exe 5596 Console 7 73,912 K
RAVCpl64.exe 2260 Console 7 9,508 K
chrome.exe 5384 Console 7 76,328 K
hotkey.exe 2568 Console 7 5,264 K
SettingSyncHost.exe 5704 Console 7 3,616 K
JME_LOAD.exe 5716 Console 7 5,704 K
PDVD10Serv.exe 4684 Console 7 5,524 K
CLMLSvc.exe 1948 Console 7 7,464 K
CCleaner64.exe 5744 Console 7 848 K
livecomm.exe 1892 Console 7 13,964 K
RuntimeBroker.exe 5932 Console 7 14,304 K
WWAHost.exe 752 Console 7 57,660 K
taskhostex.exe 4676 Services 0 4,640 K
taskhost.exe 3560 Console 7 13,308 K
audiodg.exe 4272 Services 0 14,384 K
chrome.exe 3120 Console 7 226,728 K
chrome.exe 4496 Console 7 220,624 K
chrome.exe 3620 Console 7 94,916 K
netbeans64.exe 3292 Console 7 565,888 K
taskeng.exe 3640 Services 0 4,384 K
java.exe 4752 Console 7 14,056 K
conhost.exe 3936 Console 7 3,240 K
cmd.exe 4356 Console 7 2,028 K
conhost.exe 3664 Console 7 3,228 K
tasklist.exe 4280 Console 7 5,372 K
Hopefully this was of some use to those wishing to understand cmd arguments in java a little better. The following link is a useful resource on such commands, though a list is also available from cmd itself by typing 'help' or 'help' + whatever command you need information on :
An A-Z Index of the Windows CMD command line
