Reading whole Google Spreadsheet with Sheets API v4 Java

I would like to read a Google Spreadsheet like described in the Java Quickstart

https://developers.google.com/sheets/quickstart/java

The Quickstart explaines how to read data from a give range

.....
String range = "Class Data!A2:E";
ValueRange response = service.spreadsheets().values()
        .get(spreadsheetId, range)
        .execute();

List<List<Object>> values = response.getValues();
....

But I have the problem that I do not know the Range of the Spreadsheet. The number of columns can change. So how can I read for example all the data of the Sheet without knowing the range?

Regards

Michael

Answer

You can specify the whole Sheet as just : String range = "Class Data";, for a Sheet named Class Data. You can see the output on the Try it part of the spreadsheets.values.get reference.