How to create a calculator in netbean

Answer 1

Use your java skills ;)
Try to find different examples. There are plenty of them on the Internet.

Answer 2

no

Answer 3

sorryyyyyy yes I am using

Answer 4

Ok, first drag and drop all the components including 3 Text fields + All buttons for add subt etc + Labels

Then code on each button by double clicking on it.
example for add button write:-

double a= Double.parseDouble(tf1.getText());
double b= Double.parseDouble(tf2.getText());
tf3.setText(a+b);

NOTE:- tf1 is the name of The first input text field
tf2 is.........second text field
tf3 is......... output textfield

you can change these by right clicking a button and selecting change varaible name (2nd option)

Answer 5

Using switch cases for mathematical operators

Answer 6

Are you using GUI builder ?