CODEWITHSUNDEEP
javaswingjbuttonjtextfieldcalculator
Plaix
Plaix

Reputation: 881

How to clear after calculation JButtons

I wrote a calculator, but the way i concatenate my numbers is so bad because after calculation lets say "5 + 2" when i press equal button it gives "7", the problem comes when i want to do another calculation lets say "6+1" it doesn't do it this way when i press 6 button it gives "76+1" i.e concatenating my result with the new calculation, i tried to fix it but i couldn't without disrupting another functionality. Below is part of the code.

private void NineActionPerformed(java.awt.event.ActionEvent evt) {                                     
    // TODO add your handling code here:
    TextField.setText(TextField.getText()+"9");
}                                    

private void OneActionPerformed(java.awt.event.ActionEvent evt) {                                    
    // TODO add your handling code here:
    TextField.setText(TextField.getText()+"1");
}                                   

private void TwoActionPerformed(java.awt.event.ActionEvent evt) {                                    
    // TODO add your handling code here:
    TextField.setText(TextField.getText()+"2");
}                                   

private void ThreeActionPerformed(java.awt.event.ActionEvent evt) {                                      
    // TODO add your handling code here:
    TextField.setText(TextField.getText()+"3");
}                                     

private void FourActionPerformed(java.awt.event.ActionEvent evt) {                                     
    // TODO add your handling code here:
    TextField.setText(TextField.getText()+"4");
}                                    

private void FiveActionPerformed(java.awt.event.ActionEvent evt) {                                     
    // TODO add your handling code here:
    TextField.setText(TextField.getText()+"5");
}

Upvotes: 0

Views: 2724

Answers (3)

Arpit
Arpit

Reputation: 12797

Most simple solution : add clear button and on press clear the text.

The typical solution.:

do something like this:

onequalbuttonclick [your equal button action function] 
set equalPress=true;

in other functions do something like this

    private void NineActionPerformed(java.awt.event.ActionEvent evt) {                                     
if(equalPress){        
textField.setText(9);
equalPress=false;

    }
else
textField.setText((Integer.parseInt(TextField.getText()) + 9));
}

Comment on your code: Instead of these functions just add one actionPerformed event in your class. and then you can use the getSource() method to find the button clicked.

Upvotes: 1

Festus Tamakloe
Festus Tamakloe

Reputation: 11310

Just put TextField.setText(""); at the beginning from every event

Upvotes: 0

Reimeus
Reimeus

Reputation: 159854

Instead of just concatenating the String, you need to calculate what your result will be, for example:

private void NineActionPerformed(java.awt.event.ActionEvent evt) {                                     
    textField.setText(Integer.toString(Integer.parseInt(TextField.getText()) + 9));
}

Upvotes: 2

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