¼Ò¼³°°ÀºÀÚ¹Ù2ºÎ  Á¦6Àå ¹è¿­ Ä÷º¼Ç ¿­°ÅÀÚ  6.2.4 °´Ã¼ ¹è¿­  

 

 

6.2.4 °´Ã¼ ¹è¿­

 Áö±Ý±îÁö´Â ±âº» µ¥ÀÌÅÍŸÀÔ¿¡ ´ëÇÑ ¹è¿­¸¸À» ¾ð±ÞÇß½À´Ï´Ù. ÇÏÁö¸¸ Ŭ·¡½ºÀÇ °´Ã¼ ¶ÇÇÑ ¹è¿­À» »ý¼ºÇÒ ¼ö ÀÖ½À´Ï´Ù. ±âº»µ¥ÀÌÅÍ Å¸ÀÔ°ú ´Ù¸¥Á¡ÀÌ Àֱ⠶§¹®¿¡ ¿©±â¼­ Á¤È®ÇÏ°Ô ¾ð±ÞÇØµÎ°í ³Ñ¾î °¡°Ú½À´Ï´Ù. ±âº»µ¥ÀÌÅÍŸÀÔÀ¸·Î ¹è¿­À» ¸¸µé¸é, ¸Þ¸ð¸®°¡ ¹è¿­ÀÇ ¼±¾ð°ú µ¿½Ã¿¡ »ý¼ºÀÌ µË´Ï´Ù. ÇÏÁö¸¸ °´Ã¼¹è¿­À» ¸¸µé¾úÀ» ¶§´Â °´Ã¼ÀÇ À̸§¸¸ ÷ÀÚ ¼ö¸¸Å­ »ý¼ºÇÒ »Ó °´Ã¼ ÀÚüÀÇ ¸Þ¸ð¸®´Â ÇÒ´çµÇÁö ¾Ê½À´Ï´Ù. Áï, °´Ã¼ÀÇ ¸Þ¸ð¸®´Â µû·Î »ý¼ºÇØ ÁÖ¾î¾ß ÇÏ´Â °ÍÀÌÁÒ.

 

±âº» µ¥ÀÌÅÍŸÀÔÀÇ ¹è¿­°ú °´Ã¼¹è¿­ÀÇ Â÷ÀÌÁ¡

n        ±âº» µ¥ÀÌÅÍŸÀԹ迭: ¹è¿­ »ý¼º°ú µ¿½Ã¿¡ ¸Þ¸ð¸®È®º¸

n        °´Ã¼¹è¿­: ¹è¿­À» »ý¼ºÇÏ¿´´Ù¸é °´Ã¼º¯¼öÀÇ À̸§µé¸¸ »ý¼º, °´Ã¼ÀÇ ¸Þ¸ð¸®´Â È®º¸ÇÏÁö ¾Ê´Â´Ù.

n        StringŬ·¡½º´Â ¹è¿­À» »ý¼ºÇßÀ» ¶§ ¹è¿­ÀÇ ¿ä¼Ò¿¡ ¹Ù·Î ½ºÆ®¸µÀ» ÇÒ´çÇÒ ¼ö Àֱ⠶§¹®¿¡ ¾à°£ ´Ù¸¥ ¸éÀ» °¡Áö°í ÀÖ½À´Ï´Ù. StringŬ·¡½º´Â new ¿¬»êÀÚ¸¦ »ç¿ëÇÏÁö ¾Ê°í ¹Ù·Î ÀÌÁßµû¿ÈÇ¥·Î ¹­¾î¼­ ½ºÆ®¸µÀ» StringŬ·¡½ºÀÇ º¯¼ö¿¡ ÇÒ´çÇÏÁö ¾Ê½À´Ï±î? ±×·¡¼­ ±âº»µ¥ÀÌÅÍŸÀÔ°ú Ŭ·¡½ºÀÇ Áß°£Á¤µµ µÈ´Ù°í º¸¸é µÉ °ÍÀÔ´Ï´Ù.

n        ¿¹) String str1 = ¡°¾È³çÇϼ¼¿ä¡±;     String str2 = new String(¡°¾È³çÇϼ¼¿ä¡±);

 

°´Ã¼¹è¿­ÀÇ »ý¼º°ú °´Ã¼ ÀÚüÀÇ ¸Þ¸ð¸®»ý¼ºÀÇ Á¤È®ÇÑ ¿¹´Â ¾Æ·¡¿Í °°½À´Ï´Ù.

 

ObjectArrayMain.java

class Dog{

             private String name;

             private String kind;

             public Dog(String name, String kind){

                           this.name = name;

                           this.kind = kind;

             }

             public String toString(){

                           return kind + ":" + name;

             }

}

 

public class ObjectArrayMain{

             public static void main(String[] args){

                           //1. °´Ã¼¹è¿­ÀÇ »ý¼º

                           Dog[] dog = new Dog[5];

                           for(int i=0;i<dog.length; i++)               

                                System.out.println("Dog["+i+"]:" + dog[i]);

                           //2. °´Ã¼¹è¿­ÀÇ ¹è¿­¿¡ ¸Þ¸ð¸®ÇÒ´ç

                           dog[0]=new Dog("ÂÐÂÐÀÌ","ºÒµ¶");

                           dog[1]=new Dog("¿ö¸®","¶Ë°³");

                           dog[2]=new Dog("°³¶ËÀÌ","Áøµµ°³");

                           dog[3]=new Dog("¹ß¸®","Ǫµé");

                           dog[4]=new Dog("Åõ´úÀÌ","ÀâÁ¾");

                          

                           for(int i=0;i<dog.length; i++)               

                                        System.out.println("Dog["+i+"]:" + dog[i]);

             }

}

C:\examples\6. Array>javac ObjectArrayMain.java

 

C:\examples\6. Array>java ObjectArrayMain

Dog[0]:null

Dog[1]:null

Dog[2]:null

Dog[3]:null

Dog[4]:null

Dog[0]:ºÒµ¶:ÂÐÂÐÀÌ

Dog[1]:¶Ë°³:¿ö¸®

Dog[2]:Áøµµ°³:°³¶ËÀÌ

Dog[3]:Ǫµé:¹ß¸®

Dog[4]:ÀâÁ¾:Åõ´úÀÌ

 

À§ÀÇ ¿¹¿¡¼­ Dog °´Ã¼ ¹è¿­À» »ý¼ºÇÑ ÈÄ, Ãâ·ÂÀ» ÇßÀ» ¶§´Â nullÀ» Ãâ·ÂÇϰí ÀÖ½À´Ï´Ù. Áï, ¸Þ¸ð¸®°¡ ¾ø´Ù´Â ¸»ÀÔ´Ï´Ù. ±×¸®°í °´Ã¼¹è¿­ÀÇ °´Ã¼º¯¼ö¿¡ °¢°¢ ¸Þ¸ð¸®¸¦ ÇÒ´çÇÏ´Â ¸ð½ÀÀ» º¼ ¼ö ÀÖ½À´Ï´Ù.

 

    °´Ã¼¹è¿­ÀÇ »ý¼º

n        Dog[] dog = new Dog[5];

 

    °´Ã¼¹è¿­ÀÇ °´Ã¼º¯¼ö¿¡ ¸Þ¸ð¸® ÇÒ´ç

n        dog[0]=new Dog("ÂÐÂÐÀÌ","ºÒµ¶");

n        dog[1]=new Dog("¿ö¸®","¶Ë°³");

n        dog[2]=new Dog("°³¶ËÀÌ","Áøµµ°³");

n        dog[3]=new Dog("¹ß¸®","Ǫµé");

n        dog[4]=new Dog("Åõ´úÀÌ","ÀâÁ¾");

 

ÀÌ¿Í °°ÀÌ °´Ã¼¹è¿­ÀÇ º¯¼ö¿¡ ´Ù½Ã °´Ã¼ÀÇ ¸Þ¸ð¸®¸¦ ÇÒ´çÇϰí ÀÖ½À´Ï´Ù. Áï, °´Ã¼ ¹è¿­Àº ¹è¿­ÀÇ »ý¼º°ú ¸Þ¸ð¸®ÀÇ ÇÒ´çÀÌ ºÐ¸® µÇ¾î ÀÖ´Ù´Â Á¡À» À¯³äÇϽñ⠹ٶø´Ï´Ù.



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