There is much code in this last class that I can not use and there is a
simple method without return (*it is only void type!*).

*(1)* How can I do to save the content of the file into an Object matrix?



*(2)* Why "howto.processOneSheet("filename.xlsx")" does not work?



Esample:
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*INPUT*
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import org.apache.poi.xssf.eventusermodel.examples.FromHowTo;

public class LeggiXLS_Prova {

        public static void main(String[] args) throws Exception {
                FromHowTo howto = new FromHowTo();
                *howto.processOneSheet("filename.xlsx");*  ///Doesn't work!!!/
                howto.processAllSheets("filename.xlsx");
        }
        
}
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*OUTPUT*
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Processing new sheet:

A1 - 2
B1 - 2
C1 - 2
A2 - 2
B2 - 2
C2 - 2
A3 - 2
B3 - 2
C3 - 2

Processing new sheet:


Processing new sheet:

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