10A

You are to write a class Letters. It has an instance variable of an ArrayList of Pictures. (Be sure to specify a type parameter.) The constructor takes no parameters but must initializes the instance variable.

Provide methods to:

• add a Picture to the Letters . Call it add(). It takes a Picture as a parameter
• get the total area of all the pictures in pixels. Call it totalArea(). It returns an int. If the array list is empty, return 0
• put the shortest picture first. Call it shortestFirst(). If two pictures have the same (minimum) height, use the first one. If the array list is empty, return without doing anything. You must use a helper method to find the shortest picture (Try returning the index of the shortest picture). Hint: The ArrayList remove method returns the object that was removed.
• draw all the pictures vertically starting at the given parameters x, y. Each subsequent picture will be 50 pixels further to the right than the one above it. Call the method draw(). It takes x, y as parameters

Provide Javadoc

Add these pictures of letters to your project folder.

For the draft, provide the instance variable and the constructor which initializes the instance variable. Implement the add method. Implement totalAreato return the area of the last Picture in Letters. Be sure it will work no matter how many pictures are in the ArrayList. (So you can not assume that there are 4 pictures.)

10A draft:
10A final:

10B

The class Integer2D has as an instance variable of a a 2-d array of ints. Call the instance variable matrix. It has a constructor that takes the number of rows and columns as parameters and creates a two dimensional array with the given number of rows and columns, fills it with random ints less that 10, and then assigns it to the instance variable. The row parameter is the first parameter. The constructor is started and provides a Random object that has been create with a seed. Use it to create the random numbers.

You can assume that rows and columns are > 0

Add these methods:

• public Integer2D( int rows, int columns) create the constructor described above
• public int min() get the smallest of all the numbers in the array.
• public boolean contains(int target) determines if the target is in the 2d array. Return true if it is. Otherwise return false
• public int[] getDigitCounts() counts the number of each digit in the array and returns the answer as an array of ints where the number of 0's is at index 0, the number of 1's is at index 1, etc. (note that the numbers in the array are all less than 10) For full credit, be smart about this and do not use a series of if /else if. think of a better way.

A toString method is provided.

Provide Javadoc.

    /**
     * Constructor for objects of class Integer2D
     * @param rows the number of rows the Integer2D is to have
     * @param columns the number of columns the Integer2D is to have
     */

Also use this for the Javadoc for the provided toString

    /** 
     * Gets a string represntation of this object
     * @return a string represntation of this object
     */

For the draft, provide the instance variable and complete the constructor. Code the method min to return the smallest of all the numbers in the last row. Write the Javadoc for what the method will do in the final

10B draft:
10B final:

10C

Create a class String2D. Its constructor takes a 2D array of Strings as a parameter. Each element is one word.

Code the constructor and these methods:

• public int getCharacterCount() Gets how many characters are in the array.
• public int howMany(String letter) Gets how many times the given letter appears in the array. This is case-sensitive
• public String secondLastRow() Gets a string containing all the words in the next to the last row separated by an asterisk (*) . Do not place an asterisk after the last word. Only use one loop

Provide Javadoc.

For the draft, provide the instance variable and the constructor. Code the getCharacterCount method

10C draft:
10C final: