The entered value was placed in the jTextField2 and the expression was placed in the jTextField1.
All listeners are change by one ButtonListner
All listeners are change by one ButtonsListner. Attempt #2
Old listeners was deleted
old listeners was deleted
Old listeners was deleted in lestener branch.
Merge branch 'listener' into refactoring

Conflicts:
	Calculator_v1.0/build/classes/calculator/CreateCalcInterface.class
Code from LogicButtonListener.class implements in ButtonListener.java
elements of expression are placed into ArrayList)))
The textFields show whole mathematical expression and the answer after each operation.
The class Calculation2 is working correctly.
The Old Calculation.class was removed and the Calculation2.class was renamed to "Calculation".
method c(); in ButtonListener.class does't send clean ArrayList data to Calculation.class.
Renamed package "listeners" to "listener".
Edited comments in the classes and edited the method private void operations(String sign){} in Calculation.java
Added new method to Calculation.java  -  canBeInteger();
Last commit before merge.
fixed bug for the equal button.