Java Lab http://leonguyen.com

1. Java Lab
leonguyen.com

2. Outline
- Lab 01: An introduction to Java
- Lab 02: Java Language
- Lab 03: Class and Relationship
- Lab 04: Exception and debugging
- Lab 05: Thread
- Lab 06: Input/Output
- Lab 07: Generic programming and Collections

3. Github
https://github.com/leonguyen/JavaLab

4. Lab 01
An introduction to Java

5. Outline
- Download and install JDK
- Write a Helloworld program
- Install and use Eclipse to write a Java program
- Debugging Programs in Eclipse

6. Exercise 1
Download and install JDK

7. JDK & JRE

8. Task 1 - Download JDK
- Goto Java download site http://www.oracle.
com/technetwork/java/javase/downloads/index.html

9. Task 1 - Download JDK (cont)
- Select Java Platform (JDK), choose your operation platform (eg
Window X86) and download it

10. Task 2 - Install JDK
- Run the downloaded installer, which installs both the JDK (Java
Development Kit) and JRE (Java Runtime). By default the JDK and
JRE will be installed into directories C:Program FilesJava

11. Task 3 - Config PATH environment variables
- Windows Operating System searches the current directory and the
directories listed in the PATH environment variable for executable
programs invoked from the CMD shell. It helps programmer can
compile Java code in CMD shell.
- Click the "Start" button > "Control Panel" > "System" > (Vista/7 only)
"Advanced system settings"

12. Task 3 - Config PATH .. (cont)

13. Task 4 - Verify the JDK Installation
- Launch a CMD shell > type java –version to check that JDK is
properly installed and display its version, and javac to check Path work
properly too.

14. Exercise 2
Write a Helloworld program

15. Task 1 - Open your editor
- For example: Notepad++

16. Task 2 - Write your code
- Type this code bellow to editor window

17. Task 2 - Write your code (cont)
- Save the code in a file with the name Helloworld.java
- Note: File name must same as class name.

18. Task 3 - Compile and run on command-line
- Launch a CMD shell > type javac to compile the source code and
java to run the program using the JDK runtime

19. Exercise 3
Install and use Eclipse to write a
Java program

20. Task 1 - Download Eclipse
- Download Eclipse from http://www.eclipse.org/downloads. For
beginners, choose the minimal Eclipse IDE for Java Developers.
- Unzip the downloaded file into a directory of your choice.

21. Task 2 - Launch Eclipse
- Open eclipse.exe in the Eclipse installed directory
- Choose an appropriate directory for your workspace

22. Task 3 - Create a new Java Project
- Choose "File" menu > "New" > "Java project"

23. Task 4 - Write a Java program
- In the "Package Explorer" (left panel) > Right-click on "JavaLab" (or
use the "File" menu) > New > Class

24. Task 4 - Write a Java program (cont)
- Enter the following codes

25. Task 5 - Compile and Execute
- To run the program, right-click anywhere on the source file
"HelloWorld.java" (or from the "Run" menu) > Choose "Run As" > "Java
Application".

26. Exercise 4
Debugging Programs in Eclipse

27. Task 1 - Create project and write a simple
program
- Create a new class named Debug and enter the following code.

28. Task 2 - Set an Initial Breakpoint
- Set a breakpoint at main() method by double-clicking on the left-
margin of the line containing main().

29. Task 3 - Debug
- Right click anywhere on the source code (or from the "Run" menu) >
"Debug As" > "Java Application" > choose "Yes" to switch into "Debug"
perspective Step-Over and Watch the Variables and Outputs.

30. Lab 02
Java Language 01

31. Outline
- Relational & Logical Operators
- Types
- Scanner object
- If/else
- Switch case
- Command-Line Arguments

32. Outline (cont)
- OddEvenSum
- Compute PI
- Do While statement
- Array
- Loops and conditional statement
- Nested loop
- Break label
- Continue label
- Array Sort
- Reverse String
- Array of String

33. Exercise 1
Relational & Logical Operators

34. Task 1 - Create a RelationalLogicalOpTest
class
- Enter the following code.

35. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

36. Exercise 2
Types

37. Task 1 - Create a TypesMinMax class
- Enter the following code.

38. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

39. Exercise 3
Scanner object

40. Task 1 - Create a ScannerTest class
- Enter the following code.

41. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

42. Exercise 4
If/else

43. Task 1 - Create a Mark class
- Enter the following code.

44. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

45. Exercise 5
Switch case

46. Task 1 - Create a Month class
- Enter the following code.

47. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

48. Exercise 6
Command-Line Arguments

49. Task 1 - Create a Arithemetic class
- Enter the following code.

50. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

51. Lab 02 (cont)
Java Language 02

52. Exercise 1
OddEvenSum

53. Task 1 - Create a OddEvenSum class
- Enter the following code.

54. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

55. Exercise 2
Compute PI

56. Task 1 - Create a ComputePI class
- Enter the following code.

57. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

58. Exercise 3
Do While statement

59. Task 1 - Create a DoWhile class
- Enter the following code.

60. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

61. Exercise 4
Array

62. Task 1 - Create a Arraytest class
- Enter the following code.

63. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

64. Exercise 5
Loops and conditional statement

65. Task 1 - Create a PrimeList class
- Enter the following code.

66. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

67. Exercise 6
Nested loop

68. Task 1 - Create a PrintPattern class
- Enter the following code.

69. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

70. Exercise 7
Break label

71. Task 1 - Create a JavaGoto class
- Enter the following code.

72. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

73. Exercise 8
Continue label

74. Task 1 - Create a ContinueLabel class
- Enter the following code.

75. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

76. Exercise 9
Array Sort

77. Task 1 - Create a ArrayBubleSort class
- Enter the following code.

78. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

79. Exercise 10
Reverse String

80. Task 1 - Create a ReverString class
- Enter the following code.

81. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

82. Exercise 11
Array of String

83. Task 1 - Create a DayofWeek class
- Enter the following code.

84. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

85. Lab 03
Class

86. Outline
- Booking Room
- Project assignment

87. What is OOP

88. Classes and Objects

89. Lab 03 (cont)
Class

90. Exercise 1
Booking Room

91. Class diagram

92. Task 1 - Create Date class
- Enter the following code.

93. Task 2 - Create Time class
- Enter the following code.

94. Task 3 - Create BookingRoomclass
- Enter the following code.

95. Task 3 - Create BookingRoomclass (cont)
- Enter the following code.

96. Task 3 - Create BookingRoomclass (cont)
- Enter the following code.

97. Task 3 - Create BookingRoomclass (cont)
- Enter the following code.

98. Task 4 - Write a Program class
- Enter the following code.

99. Task 5 - Execute your program
- Enter the following code.

100. Exercise 2
Project assignment

101. Class diagram

102. Task 1 - Create Teacher class
- Enter the following code.

103. Task 1 - Create Teacher class (cont)
- Enter the following code.

104. Task 2 - Create Student class
- Enter the following code.

105. Task 2 - Create Student class (cont)
- Enter the following code.

106. Task 3 - Write a Program class
- Enter the following code.

107. Task 4 - Execute your program
- Enter the following code.

108. Lab 04
Exception

109. Outline
- Exception
- Try-cath-finally
- Creating Your Own Exception Classes
- Assertion

110. Exercise 1
Exception

111. Diagram
- MobilePhone class to store mobile phone numbers and send a
messages to one of of numbers store in the array.
- PhoneTest class to demonstrate exception handling.

112. Task 1 - Create MobilePhone class
- Enter the following code.

113. Task 1 - Create MobilePhone class (cont)
- Enter the following code.

114. Task 2 - Create PhoneTest program
- Enter the following code.

115. Task 3 - Execute your program
- Enter the following code.

116. Exercise 2
Try-cath-finally

117. Task 1 - Create TryCatchFinally program
- Enter the following code.

118. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

119. Exercise 3
Creating Your Own Exception
Classes

120. Task 1 - Create MyException class
- Enter the following code.

121. Task 2 - Create MyExceptionTest program
- Enter the following code.

122. Task 3 - Execute your program
- Choose "Run As" > "Java Application".

123. Exercise 4
Assertion

124. Task 1 - Create AssertionTest program
- Enter the following code.

125. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

126. Exercise 5
Account in a Bank

127. Diagram

128. Diagram (cont)
The management of the A Bank is looking at automation as a means to
save time and effort required in their work. In order to achieve this, the
management has planned to computerize the following transactions:
• Creating a new account
• Withdrawing money from an account
• Depositing money in an account
The CEO of the company and a team of experts have chosen your
company to provide a solution for the same. Consider yourself to be a
part of the team that implements the solution for designing the
application.

129. Diagram (cont)
Create an application using exceptions and assertions to implement the
transactions. The application should consist of the following classes.
1. Account.java
2. Account Test.java
3. InsufficientFundException.java
4. NegativeAmountException.java
Each class has a specific purpose and functionality. The descriptions of
each class are as follows.

130. Task 1 - Create Account class
(The Account class represents an actual bank account. It stores the
following details of a bank account)
• customerName
• accountNumber
• accountbalance
• void displayAccountDetails() : This method displays the details of
the account

131. Task 1 - Create Account class (cont)
• void withdraw() : This method is used to withdraw money from an account.
This method accepts the account number and the amount to be withdrawn from
the account. The method then searches in the array of accounts for the account
number. Use assertions for checking whether the account number and the
amount to be withdrawn are positive. Also use an assertion to check if the array
of accounts contains a minimum of one account record. The method also
throws the user-defined exception InsufficientFund***ception in case the
amount to be withdrawn exceeds
• void deposit() :This method is used to deposit money in an account. The
account number and the amount to be deposited in the account is accepted
from the user. Use an assertion to check whether the account number is
positive. The method searches for the account number and deposits the
amount in the account if it exists. The displayAccountDetails() method is called
if the operation succeeds. Use appropriate try catch blocks to handle all the
possible exceptions that can be thrown due to the user inputs. A user-defined
exception is thrown if the account number does not exist.

132. Task 2 - Create AccountTest class
(The AccountTest class is a java main class used to test the Account
class. It creates an instance of the Account class and displays the
following menu of options to the user)
· Create a new account
· Withdraw Cash
· Deposit cash
· Exit
The user can select any of the options and a corresponding method is
invoked on the instance of the Bank class. Use an assertion to check
for the control-flow invariant in case the user types an invalid option.
The application exits when the Exit option is selected.

133. Task 3 - Create InsufficientFundException
class
- This is a user-defined exception class derived from the base class
Exception. This exception is thrown when the user tries to withdraw
more money than the current account balance.

134. Task 4 - Create NegativeAmountException
class
- This is a user-defined exception class derived from the base class
Exception. This exception is thrown when the user tries to withdraw or
deposit a negative amount.

135. Lab 05
Thread

136. Outline
- Use the Thread class
- Implement the Runable Interface
- Using join() to wait for threads to finish
- Thread priority
- Synchronization
- Dining Philosopher

137. Exercise 1
Use the Thread class

138. Task 1 - Create a RunThread class
- Enter the following code.

139. Task 2 - Main program
- Enter the following code.

140. Task 3 - Execute your program
- Choose "Run As" > "Java Application".

141. Exercise 2
Implement the Runable Interface

142. Task 1 - Create a RunThread1 class
- Enter the following code.

143. Task 2 - Main program
- Enter the following code.

144. Task 3 - Execute your program
- Choose "Run As" > "Java Application".

145. Exercise 3
Using join() to wait for threads to
finish

146. Task 1 - Create a MyThread class
- Enter the following code.

147. Task 2 - Main program
- Enter the following code.

148. Task 3 - Execute your program
- Choose "Run As" > "Java Application".

149. Exercise 4
Thread priority

150. Task 1 - Create Clicker class
- Enter the following code.

151. Task 2 - Main program
- Enter the following code.

152. Task 3 - Execute your program
- Choose "Run As" > "Java Application".

153. Exercise 5
Synchronization

154. Unsynchronized and synchronized

155. Task 1 - Create CountPrimesThread class
- Enter the following code.

156. Task 2 - Main program
- Enter the following code.

157. Task 2 - Main program (cont)
- Enter the following code.

158. Task 3 - Execute your program
- Choose "Run As" > "Java Application".

159. Exercise 6
Dining Philosopher

160. Concept

161. Task 1 - Create ChopStick class
- Enter the following code.

162. Task 2 - Create Philosopher class
- Enter the following code.

163. Task 2 - Create Philosopher class (cont)
- Enter the following code.

164. Task 2 - Main program
- Enter the following code.

165. Task 3 - Execute your program
- Choose "Run As" > "Java Application".

166. Lab 06
Input / Output

167. Stream
- Most fundamental I/O in Java is based on streams
- Reading information into a program
- Writing information from a program

168. java.io package

169. Outline
- Read a file - BufferedReader
- Write a file - BufferedWriter
- Write a file - FileOutputStream
- List the contents of a directory (Recursively)
- Copying a file without Buffering
- Copying a file with a Programmer-Managed Buffer
- Copying a file with Buffered Streams
- Best Copier
- InputStreamReader and OutputStreamWriter
- BufferedReader and BufferedWriter
- PipedReader and PipedWriter
- Serializable - ObjectOutputStream

170. Exercise 1
Read a file - BufferedReader

171. Task 1 - Create ReadFileBuffered program
- The simplest and most common-used method - BufferedReader.

172. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

173. Exercise 2
Write a file - BufferedWriter

174. Task 1 - Create WriteFileBuffered program
- BufferedWriter is a character streams class to handle the character
data. Unlike bytes stream (convert data into bytes), you can just write
the strings, arrays or characters data directly to file.

175. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

176. Exercise 3
Write a file - FileOutputStream

177. Task 1 - Create WriteFileStream program
- FileOutputStream is a bytes stream class that’s used to handle raw
binary data. To write the data to file, you have to convert the data into
bytes and save it to file.

178. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

179. Exercise 4
List the contents of a directory
(Recursively)

180. Task 1 - Create ListDirectoryRecusive
program
- Enter the following code.

181. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

182. Exercise 5
Copying a file without Buffering

183. Task 1 - Create FileCopyNoBuffer class
- Enter the following code.

184. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

185. Exercise 6
Copying a file with a Programmer-Managed
Buffer

186. Task 1 - Create FileCopyUserBuffer class
- Enter the following code.

187. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

188. Exercise 7
Copying a file with Buffered Streams

189. Task 1 - Create FileCopyBuffered class
- Enter the following code.

190. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

191. Exercise 8
Best Copier

192. Task 1 - Create FileCopyUserBufferBest
class
- Enter the following code.

193. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

194. Exercise 9
InputStreamReader and OutputStreamWriter

195. Task 1 - Create UnicodeFileIO program
- Enter the following code.

196. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

197. Exercise 10
BufferedReader and BufferedWriter

198. Task 1 - Create UnicodeFileIOBuffered
program
- Enter the following code.

199. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

200. Exercise 11
PipedReader and PipedWriter

201. Task 1 - Create pReader class
- Enter the following code.

202. Task 2 - Create pWriter class
- Enter the following code.

203. Task 3 - Main program
- Enter the following code.

204. Task 4 - Execute your program
- Choose "Run As" > "Java Application".

205. Exercise 12
Serializable - ObjectOutputStream

206. Task 1 - Create SerializedObject class
- Enter the following code.

207. Task 2 - Create SerializedObject class
- Enter the following code.

208. Task 3 - Execute your program
- Choose "Run As" > "Java Application".

209. Lab 07
Generic

210. Outline
- Generic class and Wildcard
- Student List
- ArrayList
- Employee Management
- LinkedList
- Set
- Map

211. Exercise 1
Generic class and Wildcard

212. Task 1 - Create Box class
- Enter the following code.

213. Task 2 - Create the program
- Enter the following code.

214. Task 3 - Execute your program
- Choose "Run As" > "Java Application".

215. Task 4 - Create A, B, C class
- Enter the following code.

216. Task 5 - Create BoxB, BoxC class
- Enter the following code.

217. Task 6 - Create Test BoxB, BoxC program
- Choose "Run As" > "Java Application".

218. Task 7 - Execute your program
- Choose "Run As" > "Java Application".

219. Exercise 2
Student List

220. Student List

221. Task 1 - Create Student class
- Enter the following code.

222. Task 2 - Create StudentList class
- Enter the following code.

223. Task 3 - Create the program
- Enter the following code.

224. Task 4 - Execute your program
- Choose "Run As" > "Java Application".

225. Exercise 3
ArrayList

226. Task 1 - Create ExArrayList program
- Enter the following code.

227. Task 2 - Execute your program
- Choose "Run As" > "Java Application".

228. Exercise 4
Employee Management

229. Task 1 - Create Employee class
- Enter the following code.

230. Task 2 - Create HREmpoyee class
- Enter the following code.

231. Task 3 - Create the program
- Enter the following code.

232. Task 4 - Execute your program
- Choose "Run As" > "Java Application".

233. Task 5 - Create EmpoyeeDetail class
- Enter the following code.

234. Task 6 - Edit the program
- Enter the following code.

235. Task 7 - Execute your program
- Choose "Run As" > "Java Application".

236. Exercise 5
LinkedList

237. Task 1 - Create ExLinkedList program
- Enter the following code.

238. Task 1 - Create ExLinkedList program (cont)
- Enter the following code.

239. Task 1 - Create ExLinkedList program (cont)
- Enter the following code.

240. Task 2 - Execute your program
- Enter the following code.

241. Exercise 6
Set

242. Task 1 - Create ListDirectoryRecusive class
- Enter the following code.

243. Task 2 - Execute your program
- Enter the following code.

244. Exercise 7
Map

245. Task 1 - Create ExMap program
- Enter the following code.

246. Task 1 - Create ExMap program (cont)
- Enter the following code.

247. Task 2 - Execute your program
- Enter the following code.