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RantRe: Java Pin
ZurdoDev27-Apr-20 1:23
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QuestionAndroid Studio submission Pin
Gammill18-Apr-20 10:34
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QuestionIntroduction to object oriented programming Pin
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GeneralMessage Closed Pin
16-Apr-20 8:47
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Questioncannot resolve Pin
MallardsReach30-Mar-20 3:32
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AnswerRe: cannot resolve Pin
Richard MacCutchan30-Mar-20 3:50
mveRichard MacCutchan30-Mar-20 3:50 
You are creating local variables in one method, and then trying to access them from other methods. You need to understand the scope rules, i.e whether variables are local or not. So txtNumOne and txtNumTwo should be class level variables. Alternatively they could be passed as parameters to the showAnswer method.

You have a potential mistake in the following code:
     String strAnswer; // this is a class level variable, i.e. visible to every method in the class

   void showAnswer(int dPlaces){
       Double numAnswer;
       // this has the same name as the class level variable,
       // but is only visible inside this method, so a possible conflict
       String strAnswer;
       // don't write compound statements like this, they are much harder to diagnose when things go wrong
       numAnswer = (Double.parseDouble(txtNumOne.getText()))* (Double.parseDouble(txtNumTwo.getText()));
       strAnswer = String.format("%,." + dPlaces + "f", numAnswer);
       lblDPAnswer.setText(strAnswer);

}

GeneralRe: cannot resolve Pin
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GeneralRe: cannot resolve Pin
Richard MacCutchan30-Mar-20 6:45
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GeneralRe: cannot resolve Pin
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GeneralRe: cannot resolve Pin
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GeneralRe: cannot resolve Pin
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GeneralRe: cannot resolve Pin
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QuestionRadio Button Selected Pin
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GeneralRe: Radio Button Selected Pin
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GeneralRe: Radio Button Selected Pin
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