Program to demonstrates try and multiple catch

/* Program to demonstrates try and multiple catch  */

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

class P30
{
    public static void main(String args[])
    {
        int result,no1,no2=20,position;
        int arr[]= new int[20];
        DataInputStream in = new DataInputStream(System.in);
        try
        {
            System.out.print("Enter number : ");
            no1= Integer.parseInt(in.readLine());
            result = no2/no1;
            System.out.println(no2+"/"+no1+" = "+result);
           
            System.out.print("Enter position of array where you want to store result : ");
            position = Integer.parseInt(in.readLine());
            if(position>20)
                throw new ArrayIndexOutOfBoundsException("Demo");
            if(position<0)
                throw new NegativeArraySizeException("Demo");
            arr[position]=result;   
        }
        catch(ArithmeticException e)
        {
            System.out.println(" Division by zero --> "+e);
            result=0;
            System.out.println(" Result is : "+result);
        }
        catch(ArrayIndexOutOfBoundsException e)
        {
            System.out.println(" Array size is 20 --> "+e);
        }
        catch(NegativeArraySizeException e)
        {
            System.out.println(" Array size should be positive --> "+e);
        }
        catch(Exception e)
        {
            System.out.println("I/O Error");  
        }
         System.out.println("End of program..... ");
    }
}