Answer:
The Java code is given below with appropriate comments for better understanding
Explanation:
//DataAnalyzer.java
import java.util.*;
class DataAnalyzer
{
private LinkedList<Integer> numbers;
//Parameterized Constructor that stores the list of numbers
public DataAnalyzer(LinkedList<Integer> numList)
{
//Storing numList to numbers
numbers = numList;
}
//Implementation of min() method that returns minimum number
public int min()
{
//consider starting number is the minimum number
int minNum = numbers.get(0);
//Iterate the numbers in the list
for(int j=0; j < numbers.size(); j++)
{
//Comparing each number with minNum
if( numbers.get(j) < minNum )
//Update minimum number
minNum = numbers.get(j);
}
//Return minimum number of the list
return minNum;
}
//Implementation of max() method which returns maximum number
public int max()
{
//consider starting number is the max number
int maxNum = numbers.get(0);
//Iterate the numbers in the list
for(int j=0; j < numbers.size(); j++)
{
//Comparing each number with maxNum
if( numbers.get(j) > maxNum )
//Update maximum number
maxNum = numbers.get(j);
}
//Return maximum number of the list
return maxNum;
}
//Implementation of average() method returns average of all numbers
public double average()
{
//Declare sum as type of integer and assign value as zero
int sum = 0;
//Declare avg as type of double type
double avg;
//Iterate the numbers in the list
for(int j=0; j < numbers.size(); j++)
{
//add sum of numbers
sum = sum + numbers.get(j);
}
avg = sum / (double)(numbers.size());
//Return average value of the list
return avg;
}
}
DataAnalyzerTester.java
//DataAnalyzerTester.java
import java.util.*;
import java.io.*;
//Implementation of DataAnalyzetTester class
class DataAnalyzerTester
{
//Main method
public static void main(String args[])
{
try
{
//Declare numList as variable of type
//Linked list that store user input
LinkedList<Integer> numList = new LinkedList<Integer>();
int num;
//Declare Scanner class object
Scanner input = new Scanner(System.in);
String fileName;
//Display statement
System.out.print("\n Enter file name for storing numbers: ");
fileName = input.nextLine();
//Create a variable as file type
File createfile = new File(fileName);
//Creating file
createfile.createNewFile();
//Creating a FileWriter Object
FileWriter writer = new FileWriter(createfile);
System.out.println("\n Start entering numbers (0 to stop): \n\n");
//Reading number
num = input.nextInt();
//Iterate the loop
//until user enters 0
while(num != 0)
{
//Writing numbers to the file
writer.write(num + " \n ");
//Add those numbers to list
numList.add(num);
//Get another number from user
num = input.nextInt();
}
//Creating DataAnalyzer object
DataAnalyzer analyzerObject = new DataAnalyzer(numList);
//Display statement for min, max and average values
System.out.println("\n\n Minimum Number: " + analyzerObject.min());
writer.write("\n\n Minimum Number: " + analyzerObject.min());
System.out.println("\n\n Maximum Number: " + analyzerObject.max());
writer.write("\n\n Maximum Number: " + analyzerObject.max());
System.out.println("\n\n Average: " + analyzerObject.average() + " \n\n");
writer.write("\n\n Average: " + analyzerObject.average() + " \n\n");
writer.flush();
//Close the file object
writer.close();
}
catch(Exception ex)
{
//display statement
System.out.println(ex);
}
}
}
