JAVA APPLICATION - INTERFACE

AIM:
   
To write a Java program to find the sum of numbers and average using interface.

ALGORITHM:

Step 1: Start
Step 2: Define the interface inter1
Step 3: Define the class A which implements the interface inter1
Step 4: Initialize the variable sum
Step 5: for i=0 to n-1 sum+=a[i]
Step 6: Declare the object for class A
Step 7: Read the input values to find sum
Step 8: Calculate sum and average
Step 9: Stop
 

SOURCE CODE:
testinterface.java
import java.io.*;
import java.lang.*;
interface inter1
{

 public int avg(int a[], int n);
}
class A implements inter1
{
 public int avg(int a[], int n)
  {
   int sum=0;
   for(int i=0;i<n;i++)
    {
     sum+=a[i];
    }
   return sum;
  }
}
class testinterface
{
 public static void main(String args[]) throws IOException
  {
   A a=new A();
   int z;
   int arr[]=new int[100];
   DataInputStream in=new DataInputStream(System.in);
   System.out.println("Enter the number of integers to find the sum");
   String str=in.readLine();
   int num=Integer.parseInt(str);
   for(int i=0;i<num;i++)
    {
     System.out.println("Enter the number "+(i+1)+":");
     str=in.readLine();
     z=Integer.parseInt(str);
     arr[i]=z;
    }
   int result=a.avg(arr,num);
   System.out.println("The total is "+result);
   System.out.println("The average is "+(float)result/num);
  }
}

OUTPUT :



















RESULT:
          Thus the Java program for finding the sum and average using interface was performed and the output was verified.

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