Getting Error in java while Compiling or Running

Question

i am new to java and i've downloaded a pdf document from wikibooks, and while trying to run a program i am getting following error:

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

This is the code i am trying to run:

public class Distance
{
    private java.awt.Point point0, point1;
    public Distance(int x0, int y0, int x1, int y1)
    {
        point0 = new java.awt.Point(x0, y0);
        point1 = new java.awt.Point(x1, y1);
    }

    public void printDistance()
    {
        System.out.println("Distance between " + point0 + " and " + point1
            + " is " + point0.distance(point1));
    }

    public static void main(String[] args)
    {
        Distance dist = new Distance(
        intValue(args[0]), intValue(args[1]),
        intValue(args[2]), intValue(args[3]));
        dist.printDistance();
    }

    private static int intValue(String data)
    {
        return Integer.parseInt(data);
    }
}

the program is not even compiling it just shows an error and that's it..nothing else.. — Android Guy
– Android Guy, Commented Dec 14, 2012 at 15:12

jn1kk · Accepted Answer · 2012-12-14 15:06:34Z

6

You did not provide parameters to command-line java invocation or in your IDE configuration.

It seems it needs four integer parameters, as in:

java Distance 0 1 2 3

answered Dec 14, 2012 at 15:06

jn1kk

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10 Comments

jn1kk Over a year ago

Run- > Run Configurations-> (Find your configuration - most likely Java Application called Distance) -> Arguments Tab -> Program arguments -> Run.

Android Guy Over a year ago

can you tell me what is this and why is it used, please if you have time?

jn1kk Over a year ago

Well, it seems your program calculates the Euclidean distance between two points on a 2D plane. It could either generate those points randomly, or it can use the user's input. In this case, it is the latter.

Android Guy Over a year ago

then do i have to go all this process while trying to run this "everytime"?

jn1kk Over a year ago

Once you add it to the configuration once, it is saved, and it will use the same input until you change it.

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