i want to write an application that search and show information that saved on excel file . but i cant found any thing about how to read excel file on j2me ? now what should i do ? what do you recommend ?

To be fair I know only of XML libraries provided for JME and no Excell (Office) one. I know there are some midlets available but these are commercial products. Try to look into BlackBerry libraries if there is any chance to get their library on common mobile device. Do not invest much time in it, JME is dying by slow painful death