how to calculate min, max and average and write the output into into a text file in java

To calculate the minimum, maximum, and average of a list of numbers in Java and write the results to a text file, you can use the Collections.min and Collections.max methods to find the minimum and maximum values, and use a loop to calculate the average. Here's an example of how you might do this:

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

        int min = Collections.min(numbers);
        int max = Collections.max(numbers);

        int sum = 0;
        for (int number : numbers) {
            sum += number;
        }
        double average = (double) sum / numbers.size();

        try (BufferedWriter writer = new BufferedWriter(new FileWriter("output.txt"))) {
            writer.write("Min: " + min);
            writer.newLine();
            writer.write("Max: " + max);
            writer.newLine();
            writer.write("Average: " + average);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

This code will calculate the minimum, maximum, and average of the list of numbers and write the results to the file output.txt. The resulting file will contain the following text:

Min: 1
Max: 10
Average: 5.5