javaã§ã€Œ+ã€ã‚’ã¤ã‹ã£ã¦æ–‡å—列çµåˆã—ãŸã‚‰ã©ã†ãªã‚‹ã‹ãŠãƒ¼ãŸã«ã•ã‚“ã«ä½•ã‹æ›¸ã‘ã¨è¨€ã‚ã‚ŒãŸã®ã§ä½•ã‹æ›¸ã„ã¦ã¿ã¾ã™ã€‚ よãjavaã§ã€Œ+ã€ã¤ã‹ã£ã¦æ–‡å—列çµåˆã™ã‚‹ã¨é…ã„ã‹ã‚‰æ¢ã‚ãŸæ–¹ãŒã„ã„よã£ã¦è¨€ã‚ã‚Œã¾ã™ã‚ˆã？ã©ã‚“ãªã‚±ãƒ¼ã‚¹ã§ã‚‚ã¾ãšã„ã‚“ã§ã—ょã†ã‹ï¼Ÿæ°—ã«ãªã£ãŸã®ã§èª¿ã¹ã¦ã¿ã¾ã—ãŸã€‚ ã“ã‚“ãªæ„Ÿã˜ã§ã„ãã¤ã‹æ–‡å—列をçµåˆã™ã‚‹ã‚µãƒ³ãƒ—ルを作ã£ã¦ãれをjavapã«ã‹ã‘ã¦ã¿ã¾ã™ã€‚ public class A { public String a(String s) { s = s + "a"; s = s + "b"; return s; } public String b(String s) { s += "a"; s += "b"; return s; } public String c(String s) { return s + "a" + "b"; } public String d(String s) { return "a" + "b"; } }
Javaパフォーマンス計測 æ–‡å—列æ“作編 - プãƒã‚°ãƒ©ãƒžãƒ¼ã®è„³ã¿ã
æ–‡å—列ã®çµåˆã‚’ã‚„ã‚‹ã‹ã‚‰ã¨ã„ã£ã¦ã€ã™ãã«Stringã®+ã‚’ã¤ã‹ã£ã¦ã¯ã„ã‘ãªã„ - ã‹ã¨ã˜ã‚…ã‚“ã®æŠ€è¡“日誌
Javaæ–‡å—列メモ(Hishidama's Java String Memo)
æ–‡å—列連çµã¨+演算åã«ã¤ã„ã¦æ•´ç†ã—ã¦ãŠã - 日々常々
Stringã®é€£çµã¯ãã†ç°¡å˜ãªã‚‚ã®ã§ã¯ãªã„ - ã‹ã¨ã˜ã‚…ã‚“ã®æŠ€è¡“日誌
{{#tags}}- {{label}}
{{/tags}}