HELP ME IN THIS ARRAY PROGRAMME

Active member

PLEASE HELP ME WHY THERE IS A ERROR MESSAGE"ArrayIndexOutOfBounds:-1"WHILE I RUN THE PROGRAMME ON MY COMPUTER

import java.io.*;
class Array_Starter_0___Program_25_
{
public void main()throws IOException
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int ar[]=new int[10];
int i;
System.out.println(" Enter 10 Numbers ");
for(i=0;i<10;i++)
{
ar[i]=Integer.parseInt(br.readLine());
}
int n=ar[0];
for(i=0;i<10;i++)
{
ar[i-1]=ar[i];
}
ar[i-1]=ar[0];
System.out.print(" Output ");
for(i=0;i<10;i++)
{
System.out.print(ar[i]);
}
}
}

Active member

its because you have given ar[i-1]=ar[i]

so, when i=0, i-1=-1; which is not in the index oof -1(you have given only from 0 to 9 as index of array ar. so, its Array index out o bounds, it means that the given value is beyond the boundary of the array.

Active member

HOW TO SOLVE THE PROBLEM

Active member

what is the question? this program is to do what?

Active member

I EXPECTED THIS QUESTION FROM YOU!
THIS WAS OUR COMPUTER PRACTICAL AND IT RAN IN SOME COMPUTER AND DID NOT RUN IN SOME COMPUTER.IS THIS THE PROBLEM OF THE COMPUTER OR THE CODE.OUR TEACHER IS STRANGE AND MAM GAVE THE PROCESS-
for(i=0;i<10;i++)
{
ar[i-1]=ar[i];
}
ar[i-1]=ar[0];
MAM TOLD SIZE 10 OF ARRAY AND FIND THE AIM OF THE PROGRAMME.

WE FOUND OUT THAT THE AIM WAS TO PRINT THE NUMBER ONE LESS THAN THE NUMBER INPUTED.

WHERE IS THE PROBLEM!!! Question

Active member

ok...i'll tell u wat i have understood....

the program is to accept 10 values in an array, and then print one less than the entered values of the array......right?

then it should be....

import java.io.*;
class Array_Starter_0___Program_25_
{
public void main()throws IOException
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int ar[]=new int[10];
int i;
System.out.println(" Enter 10 Numbers ");
for(i=0;i<10;i++)
{
ar[i]=Integer.parseInt(br.readLine());
}
System.out.print(" Output ");
for(i=0;i<10;i++)
{
a[i]=a[i]-1;
System.out.print(ar[i]);
}
}
}

check if this comes right/..

Active member

THANK YOU IT WORKED!!!

Active member

that's right Exclamation

Active member

OK OK O K OK OK OK cheers