Member Avatar for new_2_java

Hi all,

I am trying to execute a windows command from within my java program, but I can't get it to execute the DOS command. Here's my code:

try {
    Process p = Runtime.getRuntime().exec("cmd.exe /C cls");
} catch (IOException e) {
    // catch exception
}

But, the code doesn't clear the screen, nor it gives any error. Can you please let me know, what I am doing wrong here?

Thanks,

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  • Latest Post Latest Post by nomemory
Member Avatar for Ezzaral

What are you expecting it to do? That command isn't going to produce any noticeable output.

Member Avatar for nomemory

Try to create the process using the ProcessBuilder class:

ProcessBuilder pb= new ProcessBuilder(command);
Process proc= pb.start();

"command" is a list of Strings. For Windows it should look like this:

String[] command= { "cmd", "/C" , "dir" };

Additional:
After you create the output, you can obtain a stream of data from the process object itself:

Scanner sc= new Scanner(proc.getInputStream());

(if you want to wrap the stream inside a scanner)

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