Calculator JOptionPane Java Swing смотреть онлайн

import javax.swing.JOptionPane;

public class CalculatroJOptionPane{
private int num1, num2, addition, min, mult, div; //atributes private
private int opc, result;
private int exit=6;

public void menu(){//a method menu

while(opc!=5){
num1= Integer.parseInt(JOptionPane.showInputDialog("Enter first number: "));
num2= Integer.parseInt(JOptionPane.showInputDialog("Enter second number: "));


opc= Integer.parseInt(JOptionPane.showInputDialog("Select an option \n 1.Add \n 2.Minus \n 3.Multiplication \n 4.Division \n 5.Exit"));


//Cases

switch(opc){

case 1:
add();
break;
case 2:
minus(); //call the methods
break;
case 3:
mult();
break;
case 4:
div();
break;
case 5:
System.exit(0);
break;
default:
JOptionPane.showMessageDialog(null, "Invalid option!");
break;
}
}
}

public void add(){
result= num1+num2;
JOptionPane.showMessageDialog(null, "The result of addition is: "+result);
}

public void minus(){
result= num1-num2;
JOptionPane.showMessageDialog(null, "The result of minus is: "+result);
}

public void mult(){
result= num1*num2;
JOptionPane.showMessageDialog(null, "The result of multiplication is: "+result);
}

public void div(){
result= num1/num2;
JOptionPane.showMessageDialog(null, "The result of division is: "+result);
}

/*public void printResult{
JOptionPane.showMessageDialog(null, "The result is: "+result);
}*/

public static void main(String[]args){
CalculatroJOptionPane object= new CalculatroJOptionPane();
//we had our object and let's call the methods of the class with it

/*object.add();
object.minus();
object.mult();
object.div();*/
object.menu();//this method uses the others
}
}//This is an example where you can see various concepts of OOP