If(JOptionPane.QUESTION_MESSAGE = JOptionPane.CANCEL_OPTION)Īns = JOptionPane.showConfirmDialog(null,”Want to try again?”, JOptionPaneClass access = new jOptionPaneClass() String str = JOptionPane.showInputDialog(null, “Enter numbers plus their operators”, “String Calculator”, JOptionPane.QUESTION_MESSAGE) Enjoy! And happy programming! Java Source Code for Basic Calculator using JOptionPane The program below will just show you how to use ‘JOptionPane’ and perform basic arithmetic operations using other pre-defined functions. ![]() You are free to modify the program according to what you need and improve it. The sample of basic calculator that will be given below used ‘stringTokenizer’, parsing and error handling, the user can perform the 4 arithmetic operation on the dialog box and the program will return the answer. What is this Basic Calculator that uses JOptionPane? JOptionpane also provides many options that programmer can choose to display on the dialog box like the yes and no option, OK option and Cancel Option. You can generate 5 types of messages in JOptionpane namely, Information Message, Warning Message, Question Message, Plain Message and Error Message. JOptionPane is a pre-defined method that is from the pre-defined JOptionPane class. Using JOptionPane in Java Programming means you will use dialog boxes while the program is running. Sample Java Program on Basic Calculator Using JOptionpane ![]() NEW 4″ Multi-Touch Android 4.0 Smart Phone Dual SIM WIFI Unlocked AT&T T-Mobile
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