How to determine the length of file contents

[Mohit Hyd Kumar]

Hi all,
I am writing a program for binary search on contents of a file.

The steps involved in it are:

1. Have to read a file[Inputing the filename from the user] - using bufferedReader.readLine() method[bufferedReader = new BufferedReader(new InputStreamReader(new FileInputSteam(filename)))]
2. Have to search the number[entered by user] in the contents of file [using Binary Search]
3. Have read from the file and input the contents in a int array.

The problem arises here:
The array i formed and then sorted[2 different methods] have some zero values[as I am not able to determine actually how many numbers are there in the file, so took an arbitrary int array of size 20, but the file contains only 6 numbers, hence there are 14 "0" values].
However besides the values, the method works flawlessly

Any solutions how to determine how many numbers are present in the file[cannot use fileInputStream.read() == -1 as stated above].
Thanks in advance

[Dawid Skrzypczynski]

maybe you should use ArrayList ?

[James E Baker]

Mohit Hyd Kumar wrote:
Any solutions how to determine how many numbers are present in the file[cannot use fileInputStream.read() == -1 as stated above].
Thanks in advance

So, the user will never enter '0' as a valid value?

If you want to count how many values in an array are NOT zero, then you could do

int count = 0;  // count of non-zero values in array
for(int value : myArray) {
   if(value != 0)
   count ++;
}

Is that what you're looking to do?