ProcessBuilder does not work?

Question

I'm trying add a key register on windows using ProcessBuilder. Before I tried Runtime.getRuntime.exec() and doesn't work also.

I'm trying this.

ProcessBuilder p = new ProcessBuilder("reg add HKCU\\Software\\Microsoft\\Windows /v mykey /t REG_SZ /d " + "key_value"); try { p.start(); } catch (IOException ex) { Logger.getLogger(Registro.class.getName()).log(Level.SEVERE, null, ex); }

The exception is:

GRAVE: null java.io.IOException: Cannot run program "reg add HKCU\Software\Microsoft\Windows /v mykey /t REG_SZ /d key_value": CreateProcess error=2, O sistema não pode encontrar o arquivo especificado at java.lang.ProcessBuilder.start(ProcessBuilder.java:1042) at br.com.iguana.keys.Registro.addChavesRegistro(Registro.java:50) at br.com.iguana.keys.Registro.main(Registro.java:158) Caused by: java.io.IOException: CreateProcess error=2, O sistema não pode encontrar o arquivo especificado at java.lang.ProcessImpl.create(Native Method) at java.lang.ProcessImpl.<init>(ProcessImpl.java:386) at java.lang.ProcessImpl.start(ProcessImpl.java:137) at java.lang.ProcessBuilder.start(ProcessBuilder.java:1023) ... 2 more

Any idea ?

Is reg available as an executable on your path, as opposed to a shell builtin? — nanofarad
– nanofarad, Commented Aug 21, 2014 at 19:25
yep, In cmd I use reg and works. I tryied pass \\Windows\\System32 also and nothing — FernandoPaiva
– FernandoPaiva, Commented Aug 21, 2014 at 19:30
Separate you commands and parameters as individuals strings, this will reduce the possibility of errors... — MadProgrammer
– MadProgrammer, Commented Aug 21, 2014 at 20:56

user177800 · Accepted Answer · 2014-08-21 19:39:07Z

4

reg is a cmd shell command not an executable as in it only exists inside the cmd.exe shell environment.

answered Aug 21, 2014 at 19:39

user177800

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Comments

Marcello Davi · Accepted Answer · 2014-08-21 22:21:57Z

0

@Jarrod Roberson is right. You should use:

Process p = Runtime.getRuntime().exec("reg add HKCU\\Software\\Microsoft\\Windows /v mykey /t REG_SZ /d " + "key_value");

edited Aug 21, 2014 at 22:21

answered Aug 21, 2014 at 20:10

Marcello Davi

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6 Comments

FernandoPaiva Over a year ago

If I use: Runtime.getRuntime.exec() without Process does work, but create reg.exe on task monitor and doesn't close this task.

Marcello Davi Over a year ago

I'm not sure, but call: p.destroy() should stop reg.exe

FernandoPaiva Over a year ago

yep, I tried p.destroy(); and p.destroyForcibly(); but not stopped.

Marcello Davi Over a year ago

Ok, now i remember. Without using p.destroy() or something similar you can use another cmd command. Always call Runtime.getRuntime().exec(command); and pass as parameter: taskkill /im reg.exe /f. The /f switch is called to force-kill the process in case it can't be killed normally.

Marcello Davi Over a year ago

Just one more tip, the i'll leave you work :D Instead of create N Runtime to stop reg.exe, create a for loop

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