how to pass argument to main method in eclipse?

Question

I am trying to pass parameter to a java class main method I want to pass parameter using eclipse so I went to

run -> run configuration -> program arguments

and I wrote my arguments

exp grammar

But whenever I run it gives me this error,

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
    at LL.main(LL.java:146)

Which means it does not see the second argument "grammar", anyone know why and how to solve this ?

edit , here is my main method

public static void main(String[] args) throws IOException {
    String exp = args[0] + '$';
    LL input = new LL(exp, Grammar.fromFile(args[1]));
    try {
        input.lLParse();
    } catch (Exception e) {
        System.out.println(e);
        System.exit(1);
    }
}

@Suspended: That's the main method that's already posted in the question. — Makoto, May 12 '15 at 04:11
does the program run successfully when you call `java LL exp grammar` from command line? — Prasad Kharkar, May 12 '15 at 04:14
it is gives the same error from command line although i am giving input of two strings but the error indicates it sees only one . — Halawa, May 12 '15 at 04:20
Could you System.out.println() each of your arguments and confirm that they are both being read? — shinjw, May 12 '15 at 04:26
first argument exp is printed correctly which is args[0] the problem is with the grammar as my main cannot see args[1] although i am passing 2 strings . and by the way i cannot print the grammar — Halawa, May 12 '15 at 04:44

score 2 · Answer 1 · answered May 12 '15 at 04:44

2

In Run -> Run Configuration -> Java Application -> Arguments enter inputs separating by space

answered May 12 '15 at 04:44

Sasikumar Murugesan

4,412
10
51
74

that is exactly what i am doing but it cannot see the second argument as it gives me array out of boundary exception – Halawa May 12 '15 at 04:46
Halawa, Can you please add screen shot of your arguments window – Sasikumar Murugesan May 12 '15 at 04:47

score 1 · Answer 2 · answered Jul 03 '20 at 15:08

1)Right-click on Main class

2)Click on 'Run As'

3)Click on 'Run Configurations...'

4)Click on 'Arguments'

5)Enter input in 'Program Arguments' section

6)Click on 'Apply' and 'Run'

Note - for multiple inputs, you can enter multiple inputs in different lines in 'Program argument section'

score 0 · Answer 3 · answered May 12 '15 at 06:44

0

Check for extra space between this two arguments

answered May 12 '15 at 06:44

Moosa

79
1
2
12

score -1 · Answer 4 · answered May 12 '15 at 04:37

-1

"ArrayIndexOutOfBoundsException"

Try extending the index for array exp to args.length

answered May 12 '15 at 04:37

0x2B

91
9

Sorry didn't see that. try doing this for (int i = 0; i < args.length; i++) System.out.println(args[i]); } – 0x2B May 12 '15 at 05:05

how to pass argument to main method in eclipse?

4 Answers4