Question

This is JAVA language
Create a .java class called MoreArrayFun.java with only a main method. This program will use the ArrayManager class. The final version of the program is described below, but initially use it to test your ArrayManager class as you write it. Complete the ArrayManager class as specified below: The class will have exactly two instance variables:  An array of integers  A count of the number of elements currently in the array The class will have the following methods:  A default constructor that creates the array with room for 100 integers and set the number of elements to 0  A fillArray method that will read integers from the file data.txt and store them in the array. This method has been partially written for you. You may assume that the file has no more than 100 items in it.  A method that finds and returns the smallest value in the array, looking only at the values actually read in from the file.  A method that finds and returns the largest value in the array, looking only at the values actually read in from the file.  A method that accepts an integer parameter and returns the index of the first instance of the value in the array (looking only at the values actually read in 2 from the file). If the value is not found, the method will return -1. Make sure that you stop looking as soon as you find the value. When you submit your program, your main must do the following: 1) Create an ArrayManager object using the default constructor 2) Call fillArray with that object 3) Print out the smallest value in the array with an appropriate label (having used the appropriate method to determine that value) 4) Print out the largest value in the array with an appropriate label (having used the appropriate method to determine that value) 5) Use a sentinel-controlled loop to ask the user for values and use the appropriate method to look up each value, printing the index with a label if found and “Not found” otherwise. Use a sentinel value of -999. Do not search for the sentinel value. Part 2 Implement the program you designed for prelab. Remember that you are using the indices of the array to represent the temperatures and then storing the actual counts in the array. Do not store any temperatures in an array. Your printout should not include any highs that never appeared in the file, only values that actually show up in the file. The temperatures will be read from the file temps.txt. Use the example code in ArrayManager’s fillArray method to help you write the file reading piece. Call your program HighTemps.java. You may do this entire program in main if you wish. Sample output: Temperatures Number of Days -40 3 -10 1 -3 1 11 1 45 3 69 2 78 2 79 1 89 1 99 1 110 1

Answer 1

1)

// ArrayManager.java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class ArrayManager {
   private int temps[] = null;
   private int counter;

   public ArrayManager() {
       this.temps = new int[100];
       this.counter = 0;
   }

   public void fillArray() {
       int val;
       /*
       * Creating an Scanner class object which is used to get the inputs
       * entered by the user
       */
       Scanner sc = new Scanner(System.in);

       //Getting the input entered by the user
System.out.print("Enter a number (999 to exit) :");
val=sc.nextInt();
while(val!=999)
{
   temps[counter]=val;
   counter++;
       //Getting the input entered by the user
System.out.print("Enter a number (999 to exit) :");
val=sc.nextInt();
}

   }

   public int findLargest() {
       int max = temps[0];
       for (int i = 0; i < counter; i++) {
           if (max < temps[i]) {
               max = temps[i];
           }
       }
       return max;
   }

   public int findSmallest() {
       int min = temps[0];
       for (int i = 0; i < counter; i++) {
           if (min > temps[i]) {
               min = temps[i];
           }
       }
       return min;
   }
public int search(int number)
{
   int indx=-1;
   for(int i=0;i<counter;i++)
   {
       if(temps[i]==number)
           indx=i;
   }
   return indx;
}
}

_________________________

// MoreArrayFun.java

import java.util.Scanner;

public class MoreArrayFun {

   public static void main(String[] args) {
       int temp;
       /*
       * Creating an Scanner class object which is used to get the inputs
       * entered by the user
       */
       Scanner sc = new Scanner(System.in);

       ArrayManager arm=new ArrayManager();
       arm.fillArray();
       //Getting the input entered by the user
System.out.print("Enter an element to search :");
temp=sc.nextInt();
int indx=arm.search(temp);
if(indx==-1)
{
   System.out.println(temp+" is not found in the array.");
}
else
{
   System.out.println(temp+" is found in the array at index position "+indx);
}
       System.out.println("The Largest Temperature is :"+arm.findLargest());
       System.out.println("The Smallest Temperature is :"+arm.findSmallest());

   }

}

_________________________

Output:

Enter a number (999 to exit) :56
Enter a number (999 to exit) :67
Enter a number (999 to exit) :78
Enter a number (999 to exit) :-34
Enter a number (999 to exit) :45
Enter a number (999 to exit) :56
Enter a number (999 to exit) :-77
Enter a number (999 to exit) :-89
Enter a number (999 to exit) :999
Enter an element to search :56
56 is found in the array at index position 5
The Largest Temperature is :78
The Smallest Temperature is :-89

___________________________

2)

// data.txt

-40 3 -10 1 -3 1 11 1 45 3 69 2 78 2 79 1 89 1 99 1 110 1

______________________

// ArrayManager.java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class ArrayManager {
   private int temps[] = null;
   private int counter;

   public ArrayManager() {
       this.temps = new int[100];
       this.counter = 0;
   }

   public void fillArray() {
       try {
           Scanner sc = new Scanner(new File("data.txt"));
           while (sc.hasNext()) {
               temps[counter] = sc.nextInt();
               counter++;
           }
           sc.close();
       } catch (FileNotFoundException e) {

           System.out.println("** File Not Found **");
       }

   }

   public int findLargest() {
       int max = temps[0];
       for (int i = 0; i < counter; i++) {
           if (max < temps[i]) {
               max = temps[i];
           }
       }
       return max;
   }

   public int findSmallest() {
       int min = temps[0];
       for (int i = 0; i < counter; i++) {
           if (min > temps[i]) {
               min = temps[i];
           }
       }
       return min;
   }

}

__________________________

// HighTemps.java

public class HighTemps {

   public static void main(String[] args) {
       ArrayManager arm=new ArrayManager();
       arm.fillArray();
       System.out.println("The Largest Temperature is :"+arm.findLargest());
       System.out.println("The Smallest Temperature is :"+arm.findSmallest());
   }

}
___________________________

Output:

The Largest Temperature is :110
The Smallest Temperature is :-40

______________________