I am using the Java API (V4) to read and edit the data from a google sheet. So far, I am able to read and edit the data based on the row and column number (index).
According to the documentation, you can find the value using : FindReplaceRequest() and .getFind();
FindReplaceRequest()
.getFind();
String cellReq = (new FindReplaceRequest().setFind("samuel")).getFind();