Mario 基于游戏要求实现碰撞检测在 J2ME 中已经存在的库比更多的细节。例如，提供的方法只返回 true 或 false 时碰撞检测。这并没有告诉你的碰撞点，或雪碧的哪一侧碰撞发生，这是必须要告诉是否 Mario 跳上他的敌人头或者只是打他和模具。不过我们可以达到看似复杂控制算法用只是一个 if 子句。这个操作会给你一些想法有关实现这种功能。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001444s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.135148s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001418s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001907s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001788s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005462s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001373s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007161s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.041587s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001709s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 79852 [ RunTime:0.045248s ]
