Java Command line arguments not read

Question

I have a class that contains the following main method:

public static void main(String[] args) {
    System.out.println("args.length: " + args.length);
    if (args.length == 1) {
        // do something
   } else if (args.length == 2){
       // do something
   }
    ... Some code ...
}

The problem is that the arguments in command line are not read.

When I type ./program arg1 Arg 2 .... I always get args.length equals to 0. I tried to verify the length of arguments in other classes and I got the correct number

What could be the problem ?

You would normally start a Java program with java foo.bar.Baz arg1 arg2 ... - what is ./program? (If it's a shell script you've written to start the application, that's probably where the problem is.) — Jon Skeet
– Jon Skeet, Commented Nov 5, 2014 at 21:20
are you are running the program you think you are running? java program run like this btw: java -cp <...> your.MainClass arg1 arg2 ... — A4L
– A4L, Commented Nov 5, 2014 at 21:21

ToYonos · Accepted Answer · 2014-11-05 21:29:39Z

3

Assuming program is a script, it should look like this :

#!/bin/sh
java foo.bar.YourClass "$@"

It should now work with arguments

answered Nov 5, 2014 at 21:29

ToYonos

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Othmane · Accepted Answer · 2014-11-05 21:34:21Z

-1

./program is a script. In fact, I forgot to add $* at the end of " java -cp <...> myclass ". So, it was normal not to take into account the command line arguments. Thanks for all of you !

answered Nov 5, 2014 at 21:34

Othmane

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1 Comment

Stephen C Over a year ago

-1 - Use "$@" instead of $* if you want quoted arguments to be handled correctly by the wrapper script.

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