[NHN NEXT] Java 강의 - Week2

3. Java

5. Week02

6. Object Class 조영호

7. snatcher@nhn.com

9. G o a l

10. O O 패 러 다 임

11. 이 해

12. 설 명 만

13. 많 고

14. 코 드 는

15. 별 로

16. 없 어 요

18. Conceptual Perspective

19. Implementation Perspective

20. 객체지향

21. Object-Orientation

22. 개념

23. 관점

24. 구현

25. 관점

27. Conceptual Perspective

28. Implementation Perspective

29. 객체지향

31. 개념

32. 관점

33. 구현

34. 관점

35. Object Collaboration

36. Object-Oriented Programming Language

38. To p i c s

39. Conceptual Perspective Implementation Perspective Object Class

40. OO == 실세계의

41. 모방?

42. 실무

43. 관점에서는

44. 부적절하지만

45. 개념을

46. 이해하는

47. 데는

48. 유용함

51. http://www.slideshare.net/baejjae93/roles- responsibilities-collaborations

52. Object Object Object 협력

54. message Object Object Object Object 협력에

55. 참여하는

56. 객체

58. message Object 메시지를

59. 처리하기

60. 위한

61. 행동

62. Behavior Object Object Object

63. message Object behavior 행동에

64. 필요한

65. 상태

66. State Object Object Object

67. OO Design

68. message? message State

69. Behavior

70. state?

71. State?

72. plusOne ?

73. State?

74. plusOne plusOne minusOne setZero plusOne setZero 2

75. State?

76. plusOne 1

77. State?

79. plusOne 1 2 5 plusOne plusOne Dynamic

81. plusOne plusOne plusOne Dynamic

82. 2 3 6

83. plusOne plusOne plusOne Dynamic

84. 2 3 6 Complex!

86. Static

87. 2 3 6 1 2 5 Number

88. Static(Behavior)

89. 2 3 6 1 2 5 Number plusOne behavior

91. Static(Behavior + State)

92. 2 3 6 1 2 5 Number value plusOne state

93. behavior

96. 2 3 6 1 2 5 Number value plusOne value = value + 1 state

97. behavior

100. Number Simple!

101. value plusOne value = value + 1 state

102. behavior

105. Number Type

106. value plusOne value = value + 1 state

107. behavior

110. 2 3 6 1 2 5 Number value plusOne value = value + 1 Object

111. Type

112. instance of

114. To p i c s

116. in Class-Based OOPL

117. Type

118. Number value plusOne value = value + 1 Number value plusOne value = value + 1 member variable

119. method

120. Class

121. state

122. behavior

123. Implemented By

125. 2 3 6 1 2 5 Object

126. Class

127. instance of

128. Number value plusOne value = value + 1 member variable

129. method

131. in Java OOPL

132. Class

133. Number value plusOne value = value + 1 public class Number { int number; void plusOne() { number = number + 1 ; } } syntax member variable

134. method

136. Object Class

137. To p i c s

139. Elevator Object

141. Behavior

142. moveUp(floor)

144. Behavior

145. moveDown(floor)

147. Class와

148. Method를

149. 작성해

150. 보세요

151. public class Elevator { void moveUp(int floor) { } void moveDown(int floor) { } }

152. State

153. moveUp(floor)

154. moveDown(floor)

156. State를

157. 표현하기

158. 위해

159. Member Variable을

160. 추가해

161. 보세요

162. public class Elevator { int floor; void moveUp(int floor) { } void moveDown(int floor) { } }

163. this

164. this

166. this

167. public class Elevator { int floor; void moveUp(int floor) { this.floor = floor; } void moveDown(int floor) { this.floor = floor; } }

168. Constraint

169. 1층

170. 10층

172. this

173. public class Elevator { int floor; void moveUp(int floor) { if (floor 10 || this.floor = floor) { return; } this.floor = floor; } void moveDown(int floor) { if (floor 1 || this.floor = floor) { return; } this.floor = floor; } }

174. diff C C#/Java

175. Value Type(Primitive Type)

176. Reference Type

177. boolean, char, byte, short , int , long, float , double String, Object, Array … Pointer Type ?

179. Stack Heap Value Type

180. ReferenceType

181. Stack Heap

182. boolean, char, byte, short , int , long, float , double String, Object, Array

183. diff C C#/Java

184. new

185. Heap

186. Object Instantiation

187. Elevator elevator = new Elevator() ; Class = Type

188. ClassName()

189. Memory Allocation

190. Variable

192. Stack Heap Stack Heap

193. floor = 1elevator address Elevator Object

194. public class Elevator { ... public static void main(String[] args) { Elevator elevator = new Elevator(); System.out.println(elevator.floor); elevator.moveUp(8); System.out.println(elevator.floor); elevator.moveDown(2); System.out.println(elevator.floor); } } Method Call – object.method()

196. new

197. 1층

199. public class Elevator { Elevator(int floor) { this.floor = floor; } public static void main(String[] args) { Elevator elevator = new Elevator(1); System.out.println(elevator.floor); elevator.moveUp(8); System.out.println(elevator.floor); elevator.moveDown(2); System.out.println(elevator.floor); } } Constructor

201. public class Elevator { } Default Constructor

202. public class Elevator { Elevator() { } } Compiler

204. public class Elevator { Elevator(int floor) { this.floor = floor; } } Default Constructor

205. public class Elevator { Elevator(int floor) { this.floor = floor; } } Compiler

207. public class Elevator { Elevator() { this.floor = 1; } Elevator(int floor) { this.floor = floor; } } Default Constructor

209. public class Elevator { Elevator() { this(1); } Elevator(int floor) { this.floor = floor; } } this()

211. Behavior

212. moveUp()

213. 10층

215. Behavior

216. moveDown()

217. 1층

219. Method Overloading

220. public class Elevator { void moveUp() { moveUp(10); } void moveUp(int floor) { if (floor 10 || this.floor = floor) { return; } this.floor = floor; } void moveDown() { moveDown(1); } void moveDown(int floor) { if (floor 1 || this.floor = floor) { return; } this.floor = floor; }

221. 연습문제

222. [6-1], [6-2], [6-3], [6-4], [6-5]

223. p209

225. static void moveUp(Elevator elevator) { elevator.moveUp(10); } public static void main(String[] args) { Elevator elevator1 = new Elevator(1); moveUp(elevator1); System.out.println(Elevator1 + elevator1.floor); } Call by Reference

228. floor = 1elevator1 Elevator Object

230. floor = 1elevator1 Elevator Object elevator

232. floor = 10elevator1 Elevator Object elevator

234. floor = 10elevator1 Elevator Object

235. static void swap(Elevator elevator1, Elevator elevator2) { Elevator temp = elevator1; elevator1 = elevator2; elevator2 = temp; System.out.println(Elevator1 + elevator1.floor); System.out.println(Elevator2 + elevator2.floor); } public static void main(String[] args) { Elevator elevator1 = new Elevator(1); Elevator elevator2 = new Elevator(10); swap(elevator1, elevator2); System.out.println(Elevator1 + elevator1.floor); System.out.println(Elevator1 + elevator2.floor); } Swap

238. floor = 1elevator1 Elevator Object floor = 10elevator2

240. floor = 1elevator1 Elevator Object floor = 10elevator2 elevator1 elevator2

242. floor = 1elevator1 Elevator Object floor = 10elevator2 elevator1 elevator2

244. floor = 1elevator1 Elevator Object floor = 10elevator2

[NHN NEXT] Java 강의 - Week2

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