Guys need help on this. I'm making a calculator using a JOptionPane. But the Operator part where I can choose what operation to be use was stopped performing. Thank you guys
*import java.util.Scanner; import javax.swing.JOptionPane; public class Calculator { public static void main(String [] args) { Scanner norbel = new Scanner(System.in); int answer; String FNumber = JOptionPane.showInputDialog("Enter first Integer: "); int fnum = Integer.parseInt(FNumber); fnum = norbel.nextInt(); String operator = JOptionPane.showInputDialog("Operation:\n 1.Addition\n 2.Subtraction\n 3.Multiplication\n 4.Division\n"); Integer opt = Integer.parseInt(operator); if(opt == 1) { String opt1 = JOptionPane.showInputDialog("Enter second Integer: "); int snum = Integer.parseInt(opt1); snum = norbel.nextInt(); answer = fnum + snum; String ans = "Answer" +answer+ "!"; JOptionPane.showMessageDialog(null,answer); if(opt == 2) { String opt2 = JOptionPane.showInputDialog("Enter second Integer: "); int snum = Integer.parseInt(opt2); snum = norbel.nextInt(); answer = fnum - snum; String ans = "Answer" +answer+ "!"; JOptionPane.showMessageDialog(null,ans); } if(opt == 3) { String opt3 = JOptionPane.showInputDialog("Enter second Integer: "); int snum = Integer.parseInt(opt3); snum = norbel.nextInt(); answer = fnum * snum; String ans = "Answer" +answer+ "!"; JOptionPane.showMessageDialog(null,ans); } if(opt == 4) { String opt4 = JOptionPane.showInputDialog("Enter second Integer: "); int snum = Integer.parseInt(opt4); snum = norbel.nextInt(); answer = fnum / snum; String ans = "Answer" +answer+ "!"; JOptionPane.showMessageDialog(null,ans); } else { String error = "Error"; JOptionPane.showMessageDialog(null, error); } } }