/* ·ÖÖ§½á¹¹Ö®switch-caseµÄʹÓà 1. Óï·¨¸ñʽ switch(±í´ïʽ){ case ³£Á¿1: //Ö´ÐÐÓï¾ä1 //break; case ³£Á¿2: //Ö´ÐÐÓï¾ä2 //break; ... default: //Ö´ÐÐÓï¾ä2 //break; } 2.Ö´Ðйý³Ì£º ¸ù¾Ý±í´ïʽÖеÄÖµ£¬ÒÀ´ÎÆ¥ÅäcaseÓï¾ä¡£Ò»µ©Óëijһ¸öcaseÖеij£Á¿ÏàµÈ£¬ÄÇô¾ÍÖ´ÐдËcaseÖеÄÖ´ÐÐÓï¾ä¡£ Ö´ÐÐÍê´ËÖ´ÐÐÓï¾äÖ®ºó£¬ Çé¿ö1£ºÓöµ½break£¬ÔòÖ´ÐÐbreakºó£¬Ìø³öµ±Ç°µÄswitch-case½á¹¹ Çé¿ö2£ºÃ»ÓÐÓöµ½break£¬Ôò¼ÌÐøÖ´ÐÐÆäºóµÄcaseÖеÄÖ´ÐÐÓï¾ä¡£ ---> case ´©Í¸ ... Ö±µ½Óöµ½break»òÕßÖ´ÐÐÍêËùÓеÄcase¼°defaultÖеÄÓï¾ä£¬Í˳öµ±Ç°µÄswitch-case½á¹¹ 3. ˵Ã÷£º ¢Ù switchÖеıí´ïʽֻÄÜÊÇÌض¨µÄÊý¾ÝÀàÐÍ¡£ÈçÏ£ºbyte \ short \ char \ int \ ö¾Ù(JDK5.0ÐÂÔö) \ String(JDK7.0ÐÂÔö) ¢Ú case ºó¶¼ÊǸúµÄ³£Á¿£¬Ê¹Óñí´ïʽÓëÕâЩ³£Á¿×öÏàµÈµÄÅжϣ¬²»ÄܽøÐз¶Î§µÄÅжϡ£ ¢Û ¿ª·¢ÖУ¬Ê¹ÓÃswitch-caseʱ£¬Í¨³£caseÆ¥ÅäµÄÇé¿ö¶¼ÓÐÏÞ¡£ ¢Ü break:¿ÉÒÔʹÓÃÔÚswitch-caseÖС£Ò»µ©Ö´ÐдËbreak¹Ø¼ü×Ö£¬¾ÍÌø³öµ±Ç°µÄswitch-case½á¹¹ ¢Ý default£ºÀàËÆÓÚif-elseÖеÄelse½á¹¹¡£ defaultÊÇ¿ÉÑ¡µÄ£¬¶øÇÒλÖÃÊÇÁé»îµÄ¡£ 4. switch-case Óëif-elseÖ®¼äµÄת»» ¢Ù ¿ª·¢Öз²ÊÇ¿ÉÒÔʹÓÃswitch-case½á¹¹µÄ³¡¾°£¬¶¼¿ÉÒÔ¸ÄдΪif-else¡£·´Ö®£¬²»³ÉÁ¢ ¢Ú ¿ª·¢ÖУ¬Èç¹ûÒ»¸ö¾ßÌåÎÊÌâ¼È¿ÉÒÔʹÓÃswitch-case£¬ÓÖ¿ÉÒÔʹÓÃif-elseµÄʱºò£¬ÍƼöʹÓÃswitch-case¡£ Ϊʲô£¿switch-caseÏà½ÏÓÚif-elseЧÂÊÉԸߡ£ */ class SwitchCaseTest{ public static void main(String[] args){ int num = 1; switch(num){ case 0: System.out.println("zero"); break; case 1: System.out.println("one"); break; //½áÊøµ±Ç°µÄswitch-case½á¹¹ case 2: System.out.println("two"); break; case 3: System.out.println("three"); break; default: System.out.println("other"); //break; } //ÁíÀý£º String season = "summer"; switch (season) { case "spring": System.out.println("´ºÅ¯»¨¿ª"); break; case "summer": System.out.println("ÏÄÈÕÑ×Ñ×"); break; case "autumn": System.out.println("Çï¸ßÆøˬ"); break; case "winter": System.out.println("¶¬Ñ©°¨°¨"); break; /*default: System.out.println("¼¾½ÚÊäÈëÓÐÎó"); break; */ } //´íÎóµÄÀý×Ó£º±àÒ벻ͨ¹ý /* int number = 20; switch(number){ case number > 0: System.out.println("ÕýÊý"); break; case number < 0: System.out.println("¸ºÊý"); break; default: System.out.println("Áã"); break; } */ } }