List of Exercises

Table 2. Exercises in 113105 Software development 1
Chapter Exercise
No. Title Status of completion
Getting started 1 Extending class HelloWorld
2 Working with variables
3 A conditional
4 A loop
Language Fundamentals 5 Hotel key cards
6 Legal variable names
7 Benefits of final
8 «C» vs. Java.
9 Assignment and type safety
10 Inventing tinyint.
11 An int's minimum and maximum value
12 Pretty may not be pretty
13 Strange output
14 Poor mans ASCII table
15 Integer value hexadecimal representation
16 Binary literals
17 Testing the limits (Difficult)
18 Why using braces in System.out.println(...) ?
19 Composing strings of literals and variables
20 Escaping double quotes
21 Supplementary string exercises
22 int and char
23 float vs. double
24 int to char narrowing problems
25 Get a byte from 139
26 Ariane, I miss you!
27 Reducing long to int (difficult)
28 Calculating a circle's area
29 Dividing values
30 Strange things with operator ++
31 Adding values
32 Representational float and double miracles
33 Expressions involving infinity
34 int to short assignment
35 int to short assignment using final
36 Calculating a circle's area avoiding accidental redefinition
37 Turning weeks into seconds
38 Turning seconds into weeks
39 Using predefined Java™ standard library constants
40 Converting temperature values
41 Time unit conversion
42 Interest calculation
43 Summing short and char
44 Operator & vs. &&
45 Strange addition
46 Understanding +=
47 Three ways expressing the same
48 Guessing results
49 Cleaning up the mess
Statements 50 Providing better display
51 Comparing for equality
52 Replacing else if (...){...} by nested if ... else statements
53 Post modifying an exam's marking
54 At the bar
55 Roman numerals
56 Leap years
57 Why “break”?
58 Extending to month days
59 Converting day's names to numbers.
60 Day categories.
61 Roman numerals, using switch
62 Generating square numbers
63 Calculating factorial
64 Even or odd?
65 Square root approximation
66 Printing numbers
67 Printing just even numbers
68 Merry Xmas
69 More fun with Xmas trees
70 A basic square number table
71 Tidy up the mess!
72 HTML-ify me
73 Auxiliary Example, part 1: A multiplication table
74 Auxiliary Example, part 2: Avoiding redundant entries
75 Creating a “real” square table
76 Creating a sophisticated HTML version of your square table
77 Display all summands
78 Playing lottery
79 Guessing numbers
80 Smallest multiple
81 Smallest multiple, purely algebraic solution
82 Pythagorean triples
83 Avoiding duplicates and gaining performance
Objects and Classes 84 Compile time error
85 An Address class
86 Understanding access control
87 Explaining times
88 Implementing getter methods
89 Method signature variants
90 Will a match be found?
91 Modeling geometry objects: Rectangles
92 Modeling circles
93 Adding translations and SVG export.
94 Extending the employee example.
95 Refining access to an employee's attributes
96 File system representation
97 Your personal String class
98 Constructors variable names and “this”.
99 Class vs. instance
100 Distinguishing leap- and non-leap years
101 A method for printing square numbers using for, while and do ... while
102 Nicely formatting sine values.
103 Extending our interest calculator
104 Integer value considerations.
105 Programmer's favourite expression
106 Lotteries revisited
107 Finding the greatest common divisor of two integer values
108 Dealing with IBAN numbers
109 Cancelling fractions
110 Dealing with local Maven dependencies
111 DNS inflicted groupId / package names clashes
112 Details on execution
113 Maximum and absolute value
114 Factorial, the direct way
115 Factorial, the recursive way
116 Binomials, the recursive way
117 The exponential f ⁡ x = e x
118 Implementing sin ⁡ ( x ) .
119 Summing up in a different order.
120 Summing up integers to a given limit
121 Summing up, the better way
122 Turning seconds into weeks, part 2
123 Example: A class representing fractions
124 Compass directions
125 Compass direction neighbours
126 git local, DIY
127 git distributed, DIY
Core Classes 128 Choosing a “good” hashCode() method
129 String and good hashCode() implementations.
130 Common pitfall using trigonometric functions
131 Using constants from java.lang.Math.
132 Strings on CodingBat
133 Masking strings
134 Analyzing strings
135 Pitfalls using “==”: Equality of String instances
136 Weird, weirder, weirdest!
137 Analyzing file pathnames
Arrays 138 Assignment to final variable?
139 Converting string arrays to HTML.
140 Route navigation
141 Examinations and mark frequencies
142 Pangram checker
143 Reconsidering System.out.format().
144 Understanding search results
145 Implementing append directly
146 Purge duplicates
147 A container of fixed capacity holding integer values
148 Allow for variable capacity holding integer values
149 Reading console input
150 Prettifying output representation
151 2-dimensional arrays and .length
152 External array and string exercises
153 Tic-tac-toe using a two-dimensional array
154 Changing the game's internal representation
155 Tic-tac-toe, Computer vs. human
156 Adding support to retrieve statistical data.
157 Testing an implementation
158 Improving prime number calculation performance
159 Calculating the median
160 A simple character based plotting application
Inheritance 161 Let me pass, please!
162 Why is == correctly comparing enum instances?
163 String vs. StringBuffer
164 Alternate implementation of opposite directions
165 Defining a Shape class hierarchy
166 Scaling shapes
167 Providing toString() methods
168 protected vs. “package private”
169 protected access involving different instances
Error Handling 170 Mind your prey
171 Expected exception test failure
Working with Numbers 172 Auto boxing int to Double?
173 Why using String userInput = null?
174 Parsing short values
175 Parsing short values in hexadecimal representation
176 Locale definitions
177 Formatting int, double and LocaleDate
178 Chaining subtract method calls
interface definitions and abstract Classes 179 Understanding Arrays.sort()
180 Sorting Rectangle instances by width
181 Sorting Rectangle instances by width and height
182 Adding flexibility in sorting rectangles
183 A nonsense generator
184 An interface based plotter
Application deployment I 185 Various integer array algorithms
186 A command line version computing a sample's average and median
Reading character streams 187 Adding line numbers to text files
188 A partial implementation of GNU UNIX wc
Collections 189 Inserting strings into a Set.
190 Inserting strings into a List.
191 Representing integer coordinate values
192 Inserting Coordinate instances into a Set.
193 Getting a text's set of words.
194 A text's set of words in alphabetic order
195 Implementing unusual string sorting.
196 Words and corresponding frequencies
197 Formatting an address list
198 Implementing a set of strings
199 Implementing word frequencies by Map<String, Integer> instances.
200 Regain sorting capabilities.
201 Creating an overview of grades showing frequencies
202 Creating an overview of grades showing individual names

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