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JamesDev51
java-study
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master
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java-study
/
java-basic-study
/
src
/
ch05
/
OOPEx02.java
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50 lines (44 loc) · 1.38 KB
master
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java-study
/
java-basic-study
/
src
/
ch05
/
OOPEx02.java
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package
ch05
;
class
Engine
{
int
power
=
2000
;
}
class
Car
{
//자동차는 엔진이 아니기 때문에 상속할 수 없다.
//콤포지션 -> 결합
Engine
e
;
public
Car
(
Engine
e
){
this
.
e
=
e
;
}
}
class
Hamburger
{
String
name
=
"기본 햄버거"
;
String
재료1
=
"양상추"
;
String
재료2
=
"패티"
;
}
//상속은 상태와 행위를 물려받을 수 있지만 꼭 타입이 일치될 수 있어야 한다.
class
CheeseHamburger
extends
Hamburger
{
// 치즈햄버거 = 햄버거
//겹치지 않는 상태
String
name
=
"치즈 햅버거"
;
}
class
ChickenHamburger
{
Hamburger
h
;
String
name
=
"치킨 햄버거"
;
public
ChickenHamburger
(
Hamburger
h
){
this
.
h
=
h
;
}
}
public
class
OOPEx02
{
public
static
void
main
(
String
[]
args
) {
Engine
e1
=
new
Engine
();
Car
c1
=
new
Car
(
e1
);
System
.
out
.
println
(
"자동차의 엔진 마력은 : "
+
c1
.
e
.
power
);
CheeseHamburger
ch1
=
new
CheeseHamburger
();
System
.
out
.
println
(
"햄버거의 이름은 : "
+
ch1
.
name
);
System
.
out
.
println
(
"재료 : "
+
ch1
.
재료1
);
System
.
out
.
println
(
"재료 : "
+
ch1
.
재료2
);
Hamburger
h1
=
new
Hamburger
();
ChickenHamburger
ckh1
=
new
ChickenHamburger
(
h1
);
System
.
out
.
println
(
ckh1
.
name
);
System
.
out
.
println
(
ckh1
.
h
.
재료1
);
System
.
out
.
println
(
ckh1
.
h
.
재료2
);
}
}
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