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java-algorithm-interview/src/ch06/CallByValueExample.java at main · onlybooks/java-algorithm-interview · GitHub
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java-algorithm-interview
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src
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ch06
/
CallByValueExample.java
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src
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ch06
/
CallByValueExample.java
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package
ch06
;
import
java
.
util
.
ArrayList
;
import
java
.
util
.
List
;
public
class
CallByValueExample
{
private
static
void
modify
(
List
<
Integer
>
p
) {
p
.
add
(
7
);
}
public
static
void
main
(
String
[]
args
) {
List
<
Integer
>
a
=
new
ArrayList
<>();
a
.
add
(
5
);
a
.
add
(
6
);
// 아래의 결과로는 당연히 [5, 6]이 출력된다.
System
.
out
.
println
(
a
);
// a를 파라미터로 전달받아 엘리먼트 추가
CallByValueExample
.
modify
(
a
);
// 다시 결과를 출력해보면 [5, 6, 7]이 출력된다.
System
.
out
.
println
(
a
);
}
}
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