Incompatible types in java

I am trying to take a String from a JTextField using getText and apply it to the method SearchString but i am presented with the error Incompatible Types i cannot see anything wrong with this code however.

ActionListner code:

String whatToSearch,result

JTextField searchfield

method SearchString

EDIT: have changed to Publ开发者_运维百科ic String, but i am now given a Missing Return Statement error at the line shown above

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The compilation error is saying that you can't assign the result of SearchString(whatToSearch) to result. This is because SearchString is declared to return NO result; that's what void means!

The fix is to change the signature to public String SearchString(String input) ... and change the body to return a String value at the appropriate point or points.