Program to Compute mean, variance and standard deviation

/* Program to Compute mean, variance and standard deviation */ 

import java.io.DataInputStream;   // to load DataInputStream class          

class P8
{
    public static void main(String args[ ])
    {
        float mean=0,variance=0;
        int i;
        int x[]= new int[5];
        DataInputStream in = new DataInputStream(System.in);

        try
        {
            for(i=0;i<5;i++)
            {
                      System.out.print(" Enter array element["+(i+1)+"] : ");
                      x[i]= Integer.parseInt(in.readLine());
                      mean = mean+x[i];
            }
        }
        catch(Exception e) {  System.out.println("I/O Error");   }

        mean = mean/5;
        System.out.println("  Mean : "+mean);
        for(i=0;i<5;i++)
                   variance = variance + (x[i]-mean)*(x[i]-mean);
        variance = variance/5;
        System.out.println("  Variance : "+variance) ;
        System.out.println("  Standard Deviation : "+Math.sqrt(variance));
    }
}