excel
.....\.classpath
.....\.project
.....\bin
.....\...\help
.....\...\....\read.class
.....\...\....\write.class
.....\...\jxl.jar
.....\input.xls
.....\output.xls
.....\src
.....\...\help
.....\...\....\read.java
.....\...\....\write.java
.....\...\jxl.jar