Populate an excel sheet using the data in the java program

hi friends,
want to know the procedure for populating the excel sheet from the program.

There are several approaches. There's a package called "POI" widely available which will allow you to write XLS workbooks to a file, which Excell will read.
You can easilly generate data in "CSV" comma separated format, just using standard text file output.
You can use a COM API like JASPER to communicate with a running instance of Excell on the same machine (this is pretty complicated).

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