地形碰撞检测方法，J2ME手机游戏开发例程之一，供初学者学习，含代码！-terrain collision detection methods, the development of J2ME mobile gaming routines, one for beginners to learn, with the code!
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001146s ]
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:0.074506s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001127s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001232s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000926s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003209s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002092s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003758s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016407s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001402s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 106193 [ RunTime:0.020696s ]
