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1. java.lang.nullpointerexception 
2. Java.lang.classnotfoundexception
3. Java.lang.arithmeticexception
4. Java.lang.arrayindexoutofboundsexception
5. Java.lang.illegalargumentexception
6. java.lang.illegalaccessexception
1. java.lang.nullpointerexception 
¡¡¡¡¿ÕÖ¸ÕëÒì³££¬Òì³£µÄ½âÊÍÊÇ"³ÌÐòÓöÉÏÁË¿ÕÖ¸Õë"£¬¼òµ¥µØËµ¾ÍÊǵ÷ÓÃÁËδ¾­³õʼ»¯µÄ¶ÔÏó»òÕßÊDz»´æÔڵĶÔÏó£¬Õâ¸ö´íÎó¾­³£³öÏÖÔÚ´´½¨Í¼Æ¬£¬µ÷ÓÃÊý×éÕâЩ²Ù×÷ÖУ¬±ÈÈçͼƬδ¾­³õʼ»¯£¬»òÕßͼƬ´´½¨Ê±µÄ·¾¶´íÎóµÈµÈ¡£¶ÔÊý×é²Ù×÷ÖгöÏÖ¿ÕÖ¸Õ룬ºÜ¶àÇé¿öÏÂÊÇһЩ¸Õ¿ªÊ¼Ñ§Ï°±à³ÌµÄÅóÓѳ£·¸µÄ´íÎ󣬼´°ÑÊý×éµÄ³õʼ»¯ºÍÊý×éÔªËØµÄ³õʼ»¯»ìÏýÆðÀ´ÁË¡£Êý×éµÄ³õʼ»¯ÊǶÔÊý×é·ÖÅäÐèÒªµÄ¿Õ¼ä£¬¶ø³õʼ»¯ºóµÄÊý×飬ÆäÖеÄÔªËØ²¢Ã»ÓÐʵÀý»¯£¬ÒÀÈ»Êǿյģ¬ËùÒÔ»¹ÐèÒª¶Ôÿ¸öÔªËØ¶¼½øÐгõʼ»¯£¨Èç¹ûÒªµ÷Óõϰ£© 
¡¡¡¡2. java.lang.classnotfoundexception 
¡¡¡¡Õâ¸öÒì³£ÊǺܶàÔ­±¾ÔÚjbµÈ¿ª·¢»·¾³Öпª·¢µÄ³ÌÐòÔ±£¬°ÑjbϵijÌÐò°ü·ÅÔÚwtkϱàÒë¾­³£³öÏÖµÄÎÊÌ⣬Òì³£µÄ½âÊÍÊÇ"Ö¸¶¨µÄÀ಻´æÔÚ"£¬ÕâÀïÖ÷Òª¿¼ÂÇÒ»ÏÂÀàµÄÃû³ÆºÍ·¾¶ÊÇ·ñÕýÈ·¼´¿É£¬Èç¹ûÊÇÔÚjbÏÂ×öµÄ³ÌÐò°ü£¬Ò»°ã¶¼ÊÇĬÈϼÓÉÏpackageµÄ£¬ËùÒÔתµ½wtkϺóҪעÒâ°ÑpackageµÄ·¾¶¼ÓÉÏ¡£ 
¡¡¡¡3. java.lang.arithmeticexception 
¡¡¡¡Õâ¸öÒì³£µÄ½âÊÍÊÇ"ÊýѧÔËËãÒì³£"£¬±ÈÈç³ÌÐòÖгöÏÖÁ˳ýÒÔÁãÕâÑùµÄÔËËã¾Í»á³öÕâÑùµÄÒì³££¬¶ÔÕâÖÖÒì³££¬´ó¼Ò¾ÍÒªºÃºÃ¼ì²éÒ»ÏÂ×Ô¼º³ÌÐòÖÐÉæ¼°µ½ÊýѧÔËËãµÄµØ·½£¬¹«Ê½ÊDz»ÊÇÓв»Í×ÁË¡£ 
¡¡¡¡4. java.lang.arrayindexoutofboundsexception 
¡¡¡¡Õâ¸öÒì³£ÏàÐźܶàÅóÓÑÒ²¾­³£Óöµ½¹ý£¬Òì³£µÄ½âÊÍÊÇ"Êý×éϱêÔ½½ç"£¬ÏÖÔÚ³ÌÐòÖдó¶à¶¼ÓжÔÊý×éµÄ²Ù×÷£¬Òò´ËÔÚµ÷ÓÃÊý×éµÄʱºòÒ»¶¨ÒªÈÏÕæ¼ì²é£¬¿´×Ô¼ºµ÷ÓõÄϱêÊDz»Êdz¬³öÁËÊý×éµÄ·¶Î§£¬Ò»°ãÀ´Ëµ£¬ÏÔʾ£¨¼´Ö±½ÓÓó£Êýµ±Ï±꣩µ÷Óò»Ì«ÈÝÒ׳öÕâÑùµÄ´í£¬µ«Òþʽ£¨¼´ÓñäÁ¿±íʾϱ꣩µ÷Óþ;­³£³ö´íÁË£¬»¹ÓÐÒ»ÖÖÇé¿ö£¬ÊdzÌÐòÖж¨ÒåµÄÊý×éµÄ³¤¶ÈÊÇͨ¹ýÄ³Ð©ÌØ¶¨·½·¨¾ö¶¨µÄ£¬²»ÊÇÊÂÏÈÉùÃ÷µÄ£¬Õâ¸öʱºò£¬×îºÃÏȲ鿴һÏÂÊý×éµÄlength£¬ÒÔÃâ³öÏÖÕâ¸öÒì³£¡£ 
¡¡¡¡5. java.lang.illegalargumentexception 
¡¡¡¡Õâ¸öÒì³£µÄ½âÊÍÊÇ"·½·¨µÄ²ÎÊý´íÎó"£¬ºÜ¶àj2meµÄÀà¿âÖеķ½·¨ÔÚһЩÇé¿ö϶¼»áÒý·¢ÕâÑùµÄ´íÎ󣬱ÈÈçÒôÁ¿µ÷½Ú·½·¨ÖеÄÒôÁ¿²ÎÊýÈç¹ûд³É


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