Create and read an Excel file, cf.
<https://howtodoinjava.com/java/library/readingwriting-excel-files-in-java-poi-tutorial/>

To compile the Java (.xlsx only) programs:

        javac  WriteFormulaDemo.java
        javac  ReadFormulaDemo.java

To run the Java (.xlsx only) programs:

        java  WriteFormulaDemo
        java  ReadFormulaDemo

To run the ooRexx programs (they handle both, .xls and .xlsx):

        rexx WriteFormulaDemo.rxj
        rexx ReadFormulaDemo.rxj


rgf, 20260201
