BHSawesome2 AP CSA Java 2025+

public class Animal
{
    /* no constructors or other methods have been declared */
}

public class Fish extends Animal
{
    /* no constructors or other methods have been declared */
}

public class Goldfish extends Fish
{
    /* no constructors or other methods have been declared */
}

I. Goldfish glub = new Fish();

II. Animal glub = new Fish();

III. Fish glub = new Goldfish();

list.remove(2);
list.add(1, 4);
list.add(5);
list.set(2, 7);

I.   int[][] arr = new int [7][9];

II.  int[][] arr = new int [7][9];
     int count = 1;

     for(int i = 0; i < arr.length; i++)
     {
        for(int j = 0; j < arr[0].length; j++)
        {
           arr[i][j] = count * 2;
           count++;
        }
     }

III. int[][] arr = new int [7][9];
     int count = 1;
     int row = 0;
     int col = 0;

     while (row < arr.length && col < arr[0].length)
     {
        arr[row][col] = count * 2;
        row++;
        col++;
        count++;
     }

public void printString(String s)
{
   if (s.length() > 0)
   {
      printString(s.substring(1));
      System.out.print(s.substring(0, 1));
   }
}

public class Dog
{
   private int numLegs = 4;
   private String name = "Spot";

   public Dog(String theName)
   {
      /* implementation not shown */
   }

   public String bark()
   {
     return "Woof!";
   }

   public String getName()
   {
      return name;
   }
}

I. public Dog(String theName)

II. bark()

III. getName()

I. for (int i = 0; i <= 8; i++)
   {
      System.out.print(i);
   }

II. int i = 0;
    while (i < 8)
    {
       i +=2;
       System.out.print(i);
    }

III. for (int i = 0; i <= 8; i +=2)
     {
        System.out.print(i);
     }

public int mystery(int x, int y)
{
   if (x <= y)
       return x;
   else
       return mystery(x, y * 10);
}

public class Cat
{
    public String display()
    {
        System.out.print("Cats! ");
    }
}

public class FluffyCat extends Cat
{
    public String display()
    {
        System.out.print("Cool!");
    }
}

public static void showMe(int arg)
{
   if (arg > 1)
   {
      showMe(arg - 1);
   }

   else
   {
      System.out.print(arg + " ");
   }
}

int sum = 0;

for (int x = 0; x < 5; x++)
{
   for (int y = x; y < 5; y++)
   {
      sum++;
   }
}

System.out.println(sum);

public int sumRow (int row, int[][] values)
{
   int sum = 0;

   /* to be determined */

   return sum;
}

//I.
for (int[] rowValues : values)
{
   for (int x : rowValues)
   {
      sum += x;
   }
}

//II.
for (int i = 0; i < values[0].length;i++)
{
   sum += values[row][i];
}

//III.
int col = 0;
while (col < values[0].length)
{
   sum += values[row][col];
   col++;
}

public static int mystery(int num)
{
   if (num < 10)
   {
      return 1;
   }

   else
   {
      return 1 + mystery(num / 10);
   }
}

public class Car
{
    public void drive()
    {
        System.out.print("Vroom vroom! ");
    }
}

public class Minivan extends Car
{
    public void drive()
    {
        super.drive();
        System.out.print(" Let's go! ");
    }
}

public void changeArray(int[] data)
{
   for (int k = data.length - 1; k > 0; k--)
      data[k - 1] = data[k] + data[k - 1];
}

public int evens(int [] arr)
{
   int count = 0;

   for (int x : arr)
   {
      /* to be completed */
   }

   return count;
}

// I
if (x % 2 == 0)
   count++;

// II
if (x % 2 == 1)
   count++;

// III
if (x / 2 == 0)
   count++;

// IV
if (x / 2 == 1)
   count++;

public int findMax(int[] arr)
{
   int maxVal = 0;
   int index = 0;

   for (int i = 0; i < arr.length; i++)
   {
      if (arr[i] > maxVal)
      {
         index = i;
         maxVal = arr[i];
      }
   }
   return index;
}