I'm a beginner here in java oop. my code is showing this error. Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0

Question

THIS IS THE CODE here I want to take value from cmd and use that to get the output. Please let me know if there is any other problem. Thanks

class Basic
{
int b;
public void gd(int c){
b=c;
}
}


class HRA extends Basic
{

double hra=(0.25*b);

}


class DA extends HRA
{

double da=(0.75*b);

}


class PF extends DA
{

double pf=(0.12*b);

}

class Netsalary extends PF
{

double ns=b+hra+da+pf;

void display()
{

System.out.println("The net salary = "+ns);

}

}


class Netsalmain
{

public static void main(String arb[])
{

int a= Integer.parseInt(arb[0]);

Netsalary ob=new Netsalary();

ob.gd(a);    
ob.display();

}

}

error is showing like this

E:>java Netsalmain Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0 at Netsalmain.main(iop.java:54)

you aren't passing any arguments to your program to use and so arb has size 0 and therefore index 0 is an out of bounds exception — RAZ_Muh_Taz, Apr 02 '18 at 15:47

score 0 · Answer 1 · answered Apr 02 '18 at 15:49

0

You are not passing the command line argument and trying to access it that’s is why you are getting array index out of bound. If you are using IDE then go into run configuration and give the parameter. If you are trying to run via cmd then give the command line argument while running.

answered Apr 02 '18 at 15:49

Raman Mishra

2,392
2
10
30

thanks ! that solved my problem. – Aniket Bhunia Apr 02 '18 at 16:42
But it shows 0.0 ans. Is there any other problem in code? – Aniket Bhunia Apr 02 '18 at 16:46
b is not in the scope I think – Raman Mishra Apr 02 '18 at 16:50
What do you mean? What should I do? Can you pls elaborate. – Aniket Bhunia Apr 02 '18 at 16:57
It’s so basic buddy just try to figure out how you are accessing b in other classes if I will tell you, you will not gonna learn so try it’s really basic. – Raman Mishra Apr 02 '18 at 16:59
Try to figure how to use super class variable in subclass you will find out the problem – Raman Mishra Apr 02 '18 at 17:02

I'm a beginner here in java oop. my code is showing this error. Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0

1 Answers1