Exception in thread. I am not able to execute this program

Question

I'm just a beginner in Java. Please help in executing this simple program. It throws an exception:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0 at sum.main(sum.java:7)

The Program

class sum {
    public static void main(String args[]){
       int a,b,c;

       a=Integer.parseInt(args[0]);
       b=Integer.parseInt(args[1]);
       c=a+b;

       System.out.println(c);
    }
}

How do you call the program? With an IDE or a console? – CloudPotato Aug 25 '16 at 07:46 — CloudPotato, Aug 25 '16 at 07:46
Then have a look at the answer from Davide Lorenzo MARINO – CloudPotato Aug 25 '16 at 07:48 — CloudPotato, Aug 25 '16 at 07:48

score 5 · Accepted Answer · answered Aug 25 '16 at 07:46

5

You need to pass at least two parameters to your java program.

For example:

java sum 10 45

If you start the program from an ide (eclipse or IntelliJ or others), for default no parameters is passed to run the program. You need to edit the run configuration manually adding them. I use IntelliJ, in IntelliJ this is done setting a field named Program Arguments. In eclipse is something similar.

answered Aug 25 '16 at 07:46

Davide Lorenzo MARINO

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Thank you so much. It worked. – Jijin Aug 25 '16 at 07:53
@Jijin Maybe you have a look at [Command-Line Arguments](https://docs.oracle.com/javase/tutorial/essential/environment/cmdLineArgs.html) to understand what `args[]` actually is. – CloudPotato Aug 25 '16 at 07:56
@Jijin you are wellcome. If the answer is correct you can flag it as correct with the green flag. – Davide Lorenzo MARINO Aug 25 '16 at 07:58

Exception in thread. I am not able to execute this program

1 Answers1