Question

JAVA HELP, CANNOT FIGURE THIS CLASS OUT, coding must be done in java.

1. Given a Java test class PA01_01_02_WarmUpTest (code is below) and the following outputs as guidelines, you are to implement a Java class THAT MUST BE NAMED PA01_01_01_WarmUp, with several methods as well as a constructor and an integer array variable as instance variable in the class.

Your implementation should satisfy the following conditions:

 You may not modify class PA01_01_02_WarmUpTest ;

 The method names and their signatures should be defined as indicated in the test class;

 The output from the execution of your implementation should be exact the same as the following outputs:

The array contains:

5 7 -8 -9 0 12 11 -3 7 5 .

The reversed array contains:

5 7 -3 11 12 0 -9 -8 7 5 .

The smallest and largest are: -9, 12.

The number of times that 8 can be divided by 2 is: 3.

The number of times that 15 can be divided by 2 is: 3.

The number of times that 255 can be divided by 2 is: 7.

The number of vowels in "I love CSC260 very much!" is: 5.

The number of vowels in "I love CSC260 very much MUUUCH!" is: 8.

PA01 warmup test code (CANNOT MODIFY):

public class PA01_01_02_WarmUpTest {
   public static void main( String[] args ) {
  
       int [] tempA = {5, 7, -8, -9, 0, 12, 11, -3, 7, 5};
       int tn; String s;
  
       PA01_01_01_WarmUp pa01 = new PA01_01_01_WarmUp(tempA);
      
       System.out.println("The array contains: ");
       pa01.display();
       pa01.reverse();
       System.out.println("The reversed array contains: ");
       pa01.display();
      
       int [] smallestAndLargest = new int [2];
       smallestAndLargest = pa01.smallestAndLargest();
       System.out.printf("The smallest & laregest are: %d, %d.\n\n",
           smallestAndLargest[0], smallestAndLargest[1]);
          
       tn = 8;
       System.out.printf("The number of times that %d can be divided by 2 is: %d.\n\n",
           tn, pa01.numberOfTimesDividedBy2(tn));
       tn = 15;
       System.out.printf("The number of times that %d can be divided by 2 is: %d.\n\n",
           tn, pa01.numberOfTimesDividedBy2(tn));
       tn = 255;
       System.out.printf("The number of times that %d can be divided by 2 is: %d.\n\n",
           tn, pa01.numberOfTimesDividedBy2(tn));
          
       s = "I love CSC260 very much!";
       System.out.printf("The number of vowels in \"%s\" is: %d.\n\n",
           s, pa01.numberOfVowels(s));
       s = "I love CSC260 very much MUUUCH!";
       System.out.printf("The number of vowels in \"%s\" is: %d.\n\n",
           s, pa01.numberOfVowels(s));
   }
}

Answer 1

If you have any doubts, please give me comment...

class PA01_01_01_WarmUp{

    private int arr[];

    public PA01_01_01_WarmUp(int[] tempA){

        arr = new int[tempA.length];

        for(int i=0; i<tempA.length; i++){

            arr[i] = tempA[i];

        }

    }

    public void display(){

        for(int i=0; i<arr.length; i++){

            System.out.print(arr[i]+" ");

        }

        System.out.println(".");

    }

    public void reverse(){

        int len = arr.length;

        for(int i=0; i<len/2; i++){

            int temp = arr[i];

            arr[i] = arr[len-i-1];

            arr[len-i-1] = temp;

        }

    }

    public int[] smallestAndLargest(){

        int []result = new int[2];

        result[0] = arr[0];

        result[1] = arr[0];

        for(int i=0; i<arr.length; i++){

            if(result[0]>arr[i])

                result[0] = arr[i];

            if(result[1]<arr[i])

                result[1] = arr[i];

        }

        return result;

    }

    public int numberOfTimesDividedBy2(int n){

        int count = 0;

        while(n>0){

            n = n/2;

            count++;

        }

        return count-1;

    }

    public int numberOfVowels(String s){

        int count = 0;

        s = s.toLowerCase();

        for(int i=0; i<s.length(); i++){

            char ch = s.charAt(i);

            if(ch=='a' || ch=='e' || ch=='i' || ch=='o' || ch=='u')

                count++;

        }

        return count;

    }

}

public class PA01_01_02_WarmUpTest {

   public static void main( String[] args ) {

  

       int [] tempA = {5, 7, -8, -9, 0, 12, 11, -3, 7, 5};

       int tn; String s;

  

       PA01_01_01_WarmUp pa01 = new PA01_01_01_WarmUp(tempA);

      

       System.out.println("The array contains: ");

       pa01.display();

       pa01.reverse();

       System.out.println("The reversed array contains: ");

       pa01.display();

      

       int [] smallestAndLargest = new int [2];

       smallestAndLargest = pa01.smallestAndLargest();

       System.out.printf("The smallest & laregest are: %d, %d.\n\n",

           smallestAndLargest[0], smallestAndLargest[1]);

          

       tn = 8;

       System.out.printf("The number of times that %d can be divided by 2 is: %d.\n\n",

           tn, pa01.numberOfTimesDividedBy2(tn));

       tn = 15;

       System.out.printf("The number of times that %d can be divided by 2 is: %d.\n\n",

           tn, pa01.numberOfTimesDividedBy2(tn));

       tn = 255;

       System.out.printf("The number of times that %d can be divided by 2 is: %d.\n\n",

           tn, pa01.numberOfTimesDividedBy2(tn));

          

       s = "I love CSC260 very much!";

       System.out.printf("The number of vowels in \"%s\" is: %d.\n\n",

           s, pa01.numberOfVowels(s));

       s = "I love CSC260 very much MUUUCH!";

       System.out.printf("The number of vowels in \"%s\" is: %d.\n\n",

           s, pa01.numberOfVowels(s));

   }

}

nagarajuanagaraju-Vostro-3550:16092019$ javac PA01_01_02_WarmupTest.java nagarajuanagaraju-Vostro-3550:16092019$ java PA01_01_02_WarmUpTest, The array contains: 5 7 -8 -9 0 12 11 -3 7 5. The reversed array contains: 5 7 -3 11 12 0 -9 -8 7 5 . The smallest & laregest are: -9, 12. The number of times that 8 can be divided by 2 is: 3. The number of times that 15 can be divided by 2 is: 3. The number of times that 255 can be divided by 2 is: 7. The number of vowels in "I love CSC260 very much!" is: 5. The number of vowels in "I love CSC260 very much MUUUCH!" is: 8.