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¥ÀÌÅÍŸÀÔ¹è¿: 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];
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.
jabookÀúÀÚ¸íÇÔ |
Á¦¸ñ:¼Ò¼³°°ÀºÀÚ¹Ù2ºÎ ÀúÀÚ:ÃÖ¿µ°ü |