How can the minimum and maximum of a list of integers in a .text file be determined?

My objective is to read a .text file filled with an unknown amount of integers and find the sum/average/min/and max. I have it down to finding the sum and average, I just need help finding the min and max from a .text file. Here is what I have so far.

public static void main(String[] args)
{
    Scanner file = null; //initializes file to empty
    int cnt=0;
    int sum = 0;
    double average;
    try
    {
        //attempt to open file.
        file = new Scanner(new FileInputStream("pd06.txt"));
    }
    catch (FileNotFoundException e)
    {
        System.out.println("File Not found. Error 404");
        System.exit(2);
    }

    while(file.hasNextInt())
    {

        sum+=file.nextInt();//sums all numbers within the file 
        cnt++;              // counts all numbers in file.      
                            // Used in average. 
    }
    average = (double)sum / cnt; //Average

    System.out.println("There are "+cnt+" numbers in "
            + "the file.");
    System.out.println("The sum of which is "+sum);
    System.out.printf("The average of all %d numbers "
            + "is %.2f\n",cnt ,average);
}