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rank Á¦ÆÛ½¼È£ÇÁ 2020-04-07 (È­) 21:07 Á¶È¸ : 465
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---------------------------------------------
class MyCounter {
void inc(int a) {
a = a + 1;
}
}

public class MyCounterTest1 {

public static void main(String[] args) {
MyCounter obj = new MyCounter();
int x = 10;
obj.inc(x);
System.out.println("x = " + x);
}

}
-----------------------------------------------

ÀÌ°É ½ÇÇà½ÃÄѼ­ x = 11ÀÌ ³ª¿À°Ô²û ÇؾßÇϴµ¥ ¾îµð¸¦ °íÃÄ¾ß Çϴ°ǰ¡¿ä?

returnÀº void ¶§¹®¿¡ ¾ÈµÈ´Ù°íÇÏ°í...

Àú Á¤¸» »ýÃʺ¸°Åµç¿ä
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rank¾îµå¹êÆ® 2020-04-07 (È­) 21:59
inc ÀÇ ¸®ÅÏ Å¸ÀÔÀ» void ¸»°í int ·Î ¼öÁ¤ÇϽðí return a; ÇϽñ¸¿ä. x = obj.inc(x); ·Î Çϼ¼¿ä.
rank¶ó±×³ª¾¾µå 2020-04-07 (È­) 22:07
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±×¸®°í ÀÎÆ®´Â 10ÀÌ°í. obj°´Ã¼¾È¿¡ÀÖ´Â inc¸¦ ½ÇÇà½ÃÄ×±¸
½Ã½º¾Æ¿ôÀ¸·Î x¸¦ Ãâ·ÂÇߴµ¥ x°¡ 11ÀÌ ³ª¿À´Â°É ¿øÇϽô°ÅÀݾƿä?
º»¹®¿¡¿¡ returnÀº void¶§¹®¿¡ ¾ÈµÈ´Ù°í Çϼ˴µ¥ ±×°Ô ´äÀÔ´Ï´Ù.
obj.inc(x)¸¦ ½ÇÇàÇϸé x°¡ Mycounter.inc(x)°¡ µÇ¼­ x°¡ 11ÀÌ µÇ±â´Â ÇÕ´Ï´Ù.
mycounter.inc ³»ºÎ¿¡¼­¸¸¿ä.
returnÀÌ ¾ø°í °øÅë°øÀ¯°¡ ¾Æ´Ï±â¶§¹®¿¡ ±× ±¸¹®³¡³ª¸é x´Â ±×³É ¿ø·¡ x°¡ µË´Ï´Ù.
´äÀ» Àû¾îº¸ÀÚ¸é void inc(int a)  ¸¦ int inc(int a)·Î ¹Ù²Ù°í
obj.inc(x); System.out.println("x = " + x); ¸¦ System.out.println("x = " + obj.inc(x));
·Î ¹Ù²Ù¸é µË´Ï´Ù.
ranknick4 2020-04-07 (È­) 22:40
º¯¼ö ¸Å°³º¯¼öÀÇ ¿µ¿ª bind
Call by value ¿Í Call by reference °°Àº À̾߱⠱îÁö °¡¸é ³Ê¹« º¹Àâ ÇÏ°ÚÁÒ.
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obj.inc(x);
Çϸé..
void inc(int a)
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x °¡ a °¡ µÇ¾î¼­
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Áï ¾î¶²¶§¿¡´Â Call by value ¹æ½ÄÀÌ°í ¶Ç ¾î¶²¶§¿¡´Â Call by reference ¹æ½Äó·³ µ¿ÀÛÇÕ´Ï´Ù.
±×·±µ¥ µü ÇÏ´Ù º¸¸é °¨ÀÌ ¿É´Ï´Ù. ÀÚ¹Ù´Â ±Ùº»ÀûÀ¸·Î Call by value ¹æ½ÄÀÌÁö¸¸ ÀÌ°Ç ³»ºÎÀûÀ¸·Î Call by reference ó·³ µ¿ÀÛÇÏ°Ô ÇØÁÖ°Ú±¸³ª ÇÏ°í...

ÀÚ¹Ù[java] Call by value Call by reference
https://sleepyeyes.tistory.com/11

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