CODEWITHSUNDEEP
javashellruntimeexecioexception
Mo3z
Mo3z

Reputation: 2128

Running Shell or System Command in JAVA

private void myFunction(String userName){
    String fileName = this.generateFile(userName);
    String[] command = new String[4];
    command[0] = "cmd";
    command[1] = "/C";
    command[2] = "dir";
    command[3] = "7za a "+ userName+".7z  "+ fileName +" -p"+this.password;
    try {  
        Process p = Runtime.getRuntime().exec(command);
        BufferedReader stdInput = new BufferedReader(new
        InputStreamReader(p.getInputStream()));

        BufferedReader stdError = new BufferedReader(new
        InputStreamReader(p.getErrorStream()));

        while ((s = stdError.readLine()) != null) {
        System.out.println(s);
        }

        ProcessBuilder proc = new ProcessBuilder(command[3]);
        proc.start();
    } catch(Exception e) {  
        System.out.println(e.toString());  
        e.printStackTrace();  
    }  
}

I tried both the way of running command line in JAVA. None of them worked. Can anyone enlighten me on what I am doing wrong. I tried for 3 hours but no luck :(

I keep getting this error File Not Found java.io.IOException: Cannot run program "command"

The same command when I run from cmd, it works. I am using Windows..

Please Help. Thank you!

Upvotes: 1

Views: 26423

Answers (3)

Jarek Przygódzki
Jarek Przygódzki

Reputation: 4412

At the risk of repeating myself I'm gonna say it again: java.lang.ProcessBuilder is much better option

Upvotes: 4

Angel O'Sphere
Angel O'Sphere

Reputation: 2666

Your command is not in any of the directories in the PATH variable. And it is likely not in the "current working directory" of your Java programms process. Either set PATH correctly, or give the full absolute path to the command which you want to run.

Upvotes: 0

Shlublu
Shlublu

Reputation: 11027

Try this:

final Runtime rt = Runtime.getRuntime();
rt.exec(your command line here as a single String);

Upvotes: 5

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