Java: Calculate and print average of the stream of given numbers
Stream Average Calculation
Write a Java program to calculate and print the average (or mean) of the stream of given numbers.
Sample Solution:
Java Code:
import java.util.*;
class solution {
// Prints average of a stream of numbers
static void streamAvg(float arr[])
{
int n = arr.length;
float avg = 0;
for (int i = 0; i < n; i++)
{
//avg = getAvg(avg, arr[i], i);
avg = (avg * i + arr[i]) / (i + 1);
System.out.printf("Average of %d numbers is %f \n",
i + 1, avg);
}
return;
}
// Calculate the new average
static float getAvg(float prev_avg, float x, int n)
{
return (prev_avg * n + x) / (n + 1);
}
public static void main(String[] args)
{
float arr[] = {10, 20, 30, 40, 50, 60, 70, 80, 90, 100};
streamAvg(arr);
}
}
Sample Output:
Average of 1 numbers is 10.000000 Average of 2 numbers is 15.000000 Average of 3 numbers is 20.000000 Average of 4 numbers is 25.000000 Average of 5 numbers is 30.000000 Average of 6 numbers is 35.000000 Average of 7 numbers is 40.000000 Average of 8 numbers is 45.000000 Average of 9 numbers is 50.000000 Average of 10 numbers is 55.000000
Flowchart:
For more Practice: Solve these Related Problems:
- Write a Java program to calculate the average of numbers from a stream using Java 8 collectors.
- Write a Java program to compute the average of an integer stream in parallel and compare the performance with a sequential stream.
- Write a Java program to implement a custom average calculation on a stream using reduce and map operations.
- Write a Java program to filter a stream of numbers before calculating the average using lambda expressions.
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