This isn't a full review (yet), but some hopefully helpful comments. • You should always start your Swing application by calling SwingUtilities.invokeLater. Explains why very well.

This is a Java calculator I made for my programming. Simple Java calculator using Swing. Implementing the ActionListener. If you happen to be using Java 8. So i want to make this calculator i'm beginner so i dont know how to make calculations using. Java Calculator GUI. Import java.awt.event.ActionListener.

• Your calculator would be able to support longer equations in a much simpler fashion if you instead placed your symbols in a stack. Then you'd be able to support an arbitrary number of statements, plus parentheticals, and would find your total by just popping each successive element from the stack and applying the appropriate operation (if any). This would make the functionForMultipuleEntryPastTwoNumbers() obsolete since it would support any number of numbers and operands. Hal7600 Windows 7 Loader By Haze[2011] X86 X64 Rar. • Using a double for the numberOne, numberTwo, and total variables is inviting a loss of precision. Consider float BigDecimal instead.

• You don't have any checks against invalid operations. What if a user enters 2 / 0? Or if they enter a number that's too long to store in a double or the placeholder array? • Instead of the testingStringOutputToConsole() method, you may want to consider writing unit tests using a framework like JUnit to verify your functionality.

• I'm not understanding the purpose of the placeholder array. Maybe, instead have a String for the entered value? Then when the user enters a symbol, use Double.parseDouble or Integer.parseInt as appropriate to convert the previously entered value to the appropriate numeric type. Right now, if you enter 1.02, your method to convert that to a number would result in 1.2 because it converts the digits prior to the decimal to an int ( 1) and then the digits after the decimal to an int ( 2), builds a new string ( 1.2), and parses the decimal.

Hey all I am a month or two in coding in java and currently I am doing a java calculator gui project, my professor requires us to code the gui by hand, and I did so with a panel and gridbaglayout layout manager, anyways since this is a calculator I have a plethora of buttons to listen to during program execution, I ask how do I perform tasks accordingly with each button? Do I create an actionlistener class or mouselistener class? And with each button I have, do I assign a unique class for each button component I have? I.e: one class for the button 1, one class for the addition addition button and so on. Or can I just, (as I have been planning earlier) create one action or mouselistener class and override the existing actionPerformed method in the original class to be implemented and use it for the whole of my buttons. I do not however know how to perform the latter approach. Although, I have this vague idea that my actionPerformed method will have like, a case statement that reads the currently pressed button, although I do not know how to detect the currently pressed button. Princess Hours Tagalog Dubbed.

Santee Frame Serial Numbers there. A little background on my code: I have stored all digit buttons (i.e 0 - 9) in an array list of buttons for easy access, I have also stored all calculator functions in a nother arraylist of buttons with their own equivalent identifier in an enum I have created. That is all, thank you for the help and for reading this lengthy post.