10A

You are given a class Gallery which models a collection of Pictures. The constructor takes an arraylist of Picture objects

You are to add these methods and constructor and provide javadoc:

• public Gallery(ArrayList<Picture> list) the constructor
• public int getTotalHeight() Gets the total height of all the pictures
• public int getCountWiderThan(int width) Gets the number of pictures that have a width greater than the given value
• public void shortestFirst() Put the Picture with the smallest height first. Use a private helper method to find the shortest Picture
• public void draw(int x, int y) draws the pictures vertically with a gap of 10 pixels between each picture starting at x, y

Download these images and save them in the project folder

For the draft, provide instance variables, the constructor, and the getTotalHeight() method. Provide Javadoc

10A draft:
10A final:

10B

Complete the Array2DUtil class. Array2DUtil has a constructor that creates a two dimensional array of random ints less that 100 with the given number of rows and columns and assigns it to the instance variable. The Random object is created for you with a seed. Do not change it.

Add these methods

• public double average() Gets the average of all the integers in the array for this Array2DUtil
• public String toString() returns a string representation of a m x n array with m rows each of which contains the n numbers in the columns of that row, separated by commas. Your method should not use System.out.println
• public static double average(int[][] array) Gets the average of the values in the given 2d array. Notice that you have 2 methods named average: an instance method that works on the instance variable of the class and a static method that works on the parameter passed to it.

For the draft, provide instance variable and constructor. Code the instance method average to return the average of the last column.

10B draft:
10B final:

10C

Create a class String2DArray. Its constructor takes a 2D array of Strings as a parameter. The class has methods

• public String longestWord() Gets the longest word in the array. If two words are the same length, return the first
• public String lastColumn() Gets a string containing all the words in the last column separated by spaces
• public boolean find(String word) Determines if the array contains the given word. Returns true if it does. otherwise false

For the draft, implement longestWord().

10C draft:
10C final: