Question

I am making a project for college and have made a program which creates csv files. I would like there to be a button which you can click which then opens the csv file with excel. Thanks

Answer 1

Knowing that MsOffice is installed on the system, you should be able to open a document with it from command line using the command

excel myDoc.csv

to execute such a command from java, you could use this snapshot:

File myCSVFile; //reference to your file here 
String execString = "excel " + myCSVFile.getAbsolutePath();
Runtime run = Runtime.getRuntime();
try {
    Process pp = run.exec(execString);
} catch(Exception e) {
    e.printStackTrace();
}

This is somewhat rough and needs styling, of course, but generally it should work. Besides, to be more graceful you could also check Windows registry, using the java.util.prefs.Preferences class, to know if MsOffice is installed and, if yes, where. But, please, be aware, if you are reckoning for MsExcel (as I understood from your post), this will automatically cancel Java’s multiplatform approach. Hopefully, this helps 🙂