Thread: logic error somewhere.. working with try & catch, simple array.. please help

// CS 0401 Fall 2010
// Lab 10
// You must modify this file so that it works as described in the lab handout.
import java.util.*;
import java.io.*;
import java.lang.*;
 
public class lab10
{
	public static void main(String [] args) throws IOException
	{
		Scanner inScan, fScan = null;
		int [] A = new int[5];
		inScan = new Scanner(System.in);
		String fName;
 
 
		do
		{
			System.out.println("Please enter the file to read from: ");
			fName = inScan.nextLine();
		} while (!fName.toString().equals("lab10out.txt"));
 
 
		fScan = new Scanner(new File(fName));
		String nextItem = " ";
		int nextInt = 0;
		int i = 0;
 
		while (fScan.hasNextLine())
		{
			try
			{
				nextItem = fScan.nextLine(); // reads all lines as strings
				nextInt = Integer.parseInt(nextItem); // then reads all lines as ints
				A[i] = nextInt;     // all of the numbers are stored in 
				i++;                 // processes through array until final line is reached
 
			if (i>A.length)    // if incremented more than array size 
			{
				int [] temp = new int[A.length*2];  // create new array with the size of array A * 2 ( doubled) == A = 10
				int j;
				for(j=0; j<A.length; j++)
				{
					temp[j] = A[j];  // put all of the values of old array into new array Temp 
				}
				temp[j] = nextInt;  // all the new numbers are stored in nextInt soo nextInt = 10
				i++;
				A = new int[temp.length]; // new Array size now array size A is 10
 
 
			}
			}catch (NumberFormatException e1)
			{
				System.out.println(nextItem + "  is not an integer -- Ignored");
			}catch (ArrayIndexOutOfBoundsException e2)
			{
				System.out.println("Resizing array from " + A.length + "to" +
								(A.length*2) + ".");
 
			}
		}
 
		System.out.println("Here are your " + i + " items:");
		for (int j = 0; j < i; j++)
		{
			System.out.println(A[j] + " ");
		}
	}
}

Heres my output:

bogus is not an integer -- Ignored
weasel is not an integer -- Ignored
Resizing array from 5to10.
Resizing array from 5to10.
3.5 is not an integer -- Ignored
Resizing array from 5to10.
Resizing array from 5to10.
Resizing array from 5to10.
Resizing array from 5to10.
Resizing array from 5to10.
Resizing array from 5to10.
Here are your 5 items:
100
200
300
150
400

Needed output

bogus is not an integer -- ignored
weasel is not an integer -- ignored
Resizing array from 5 to 10
3.5 is not an integer -- ignored
Resizing array from 10 to 20
Here are your 13 items:
100
200
300
150
400
600
250
800
50
500
450
600
550

I suggest you step through your code with a debugger.

Have you tried putting your if(i>a.length) block inside of your catch block ? It looks to me like you are going to keep throwing the exception until you change your code to check A[i] is within bounds before attempting to assign it.

good luck!