Writing body of AlgorithmTester and RandomNumberFileMaker

Sorting/AlgorithmTester.java

@@ -1,5 +1,7 @@
 package Sorting;
 
+import java.util.Scanner;
+import java.util.InputMismatchException;
 /**
  * This class contains the main method and presents an interface for the user to
  * compare sorting algorithm efficiencies. The user will be able to generate files
@@ -8,8 +10,32 @@ package Sorting;
  */
 public class AlgorithmTester{
 
+    final static Scanner sc = new Scanner(System.in);
+    static int input;
     public static void main(String[] args) {
+        System.out.println("SORTING ALGORITHM TESTER\n");
+        boolean quit = false;
+        while(!quit){
+            System.out.println("Please select an option:");
+            System.out.println("1) Make a file of random numbers");
+            System.out.println("2) Sort a file of random numbers");
+            System.out.println("0) Exit")
        
+            try{
+                input = sc.nextInt();
+         //Using the new switch syntax introduced in JDK 13
+        //this is a switch expression (lambda expression) rather than a switch statement
+                switch(input){
+                    case 1 -> makeFile();
+                    case 2 -> sortFile();
+                    case 3 -> quit=true;
+                }
+
+            } catch(InputMismatchException ex){
+                System.out.println("Invalid input");
+            }
+        }
+        sc.close();
     }
 
 }

Sorting/RandomNumberFileMaker.java

@@ -1,5 +1,10 @@
 package Sorting;
 
+import java.io.File;
+import java.io.IOException;
+import java.io.FileWriter;
+import java.lang.Math;
+
 /**
  * This class will allow the user to make a file of random integers.
  * The user will be able to select a file name, how many numbers are in the file,
@@ -7,4 +12,25 @@ package Sorting;
  */
 public class RandomNumberFileMaker {
     
+    public RandomNumberFileMaker(String filename, int count, int min, int max){
+        try{
+            File randomNumbers = new File(filename);
+            if(randomNumbers.createNewFile()==false){
+                System.out.println("File already exists.");
+            }
+            else{
+                FileWriter randomWriter = new FileWriter(randomNumbers);
+                for(int i=0;i<count;i++){
+                 int rand = min + (int) (Math.random()*(max-min));
+                 randomWriter.write(rand);
+                 randomWriter.write("\n");
+            }
+            randomWriter.close();
+            }
+        }catch (IOException ex){
+            System.err.println(ex);
+        }
+        
+    }
+
 }