All working, able to be built to .jar

src/main/java/CellFileReader.java

@@ -0,0 +1,50 @@
+import org.apache.commons.csv.CSVFormat;
+import org.apache.commons.csv.CSVParser;
+import org.apache.commons.csv.CSVRecord;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.List;
+
+public class CellFileReader {
+
+    private List<Integer[]> distinctCells = new ArrayList<>();
+
+    public CellFileReader(String filename) {
+
+        if(!filename.matches(".*\\.csv")){
+            filename = filename + ".csv";
+        }
+
+        CSVFormat cellFileFormat = CSVFormat.Builder.create()
+                .setHeader("Alpha", "Beta")
+                .setSkipHeaderRecord(true)
+                .build();
+
+        try(//don't need to close reader bc of try-with-resources auto-closing
+            BufferedReader reader = Files.newBufferedReader(Path.of(filename));
+            CSVParser parser = new CSVParser(reader, cellFileFormat);
+        ){
+            for(CSVRecord record: parser.getRecords()) {
+                Integer[] cell = new Integer[2];
+                cell[0] = Integer.valueOf(record.get("Alpha"));
+                cell[1] = Integer.valueOf(record.get("Beta"));
+                distinctCells.add(cell);
+            }
+        } catch(IOException ex){
+            System.out.println("cell file " + filename + " not found.");
+            System.err.println(ex);
+        }
+    }
+
+    public List<Integer[]> getCells(){
+        return distinctCells;
+    }
+
+    public Integer getCellCount() {
+        return distinctCells.size();
+    }
+}