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I started using eclipse in my macbook pro and wrote program that needs args like (3 1 5) to work . The program already compiled using eclipse . how can i run it through Terminal with args? more specific : what i need to do for operate it with file that contain the info. like batch file in windows? I am new in the java world so please keep it simple as you can.

FuxsA
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  • You do it the same way that you do it on Windows or Linux. The "possible duplicate" suggested by @l'L'l has an example. – Erwin Bolwidt Jul 28 '14 at 02:30

1 Answers1

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For an Example.java program with args 3 1 5, enter

java Example 3 1 5

into Terminal. These arguments will be passed into your Example class's

public static void main(String[] args)

method as the string array {"3", "1", "5"}.

Alternatively, to accept arguments from a file instead of from Terminal, you might try specifying a configuration file as a program argument:

java Example args.txt

and then in the Example class, do something like:

public static void main(String[] args) throws FileNotFoundException {
    String filename = args[0];
    Scanner scanner = new Scanner(new File(filename));
    int firstArg = scanner.nextInt();
    int secondArg = scanner.nextInt();
    int thirdArg = scanner.nextInt();
    //etc.
}
Hans Brende
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  • thank you but what i need to write in the configuration file as a program argument? – FuxsA Jul 28 '14 at 15:09
  • @FuxsA you can write whatever you want in the configuration file, as long as you parse it correctly in your code. In my example above, you would simply write "3 1 5" in the configuration file, which would be assigned to `firstArg`, `secondArg`, and `thirdArg`, respectively. – Hans Brende Jul 28 '14 at 16:08