JAVA CODE ERROR AND NO GUI SHOWING UP

My GUI is not coming up and shows in console only and has text of "enter population" when any number is enter nothing happen but when any letter is enter the error pop up which i will paste at the bottom.

package j.states;

import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Scanner; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel;

public class JStates extends JFrame implements ActionListener { String[] states = {"Az", "Ca", "Nv", "Ut", "Nm"}; static int [] JStates = new int[5]; static double [] area = new double[5]; JComboBox statelist = new JComboBox(states); JLabel lbl = new JLabel(); public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter Population of 5 state(\"Az\", \"Ca\", \"Nv\"," + " \"Ut\", \"Nm\") "); for(int i =0; i < 5; i++) { JStates[i] = sc.nextInt(); } System.out.println("Enter area of 5 state(\"Az\", \"Ca\", \"Nv\", " + "\"Ut\", \"Nm\") "); for(int i = 0; i < 5; i++) { area[i] = sc.nextDouble(); } JStates ft = new JStates(); ft.setVisible(true); } public JStates() { setLayout(new FlowLayout()); setSize(400,300); setTitle("Population"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); statelist.setSelectedIndex(0); statelist.addActionListener(this); add(statelist); add(lbl); } @Override public void actionPerformed(ActionEvent e) { if (e.getSource() == statelist) { JComboBox cb = (JComboBox) e.getSource(); String item = (String) cb.getSelectedItem(); switch (item) { case "Az": lbl.setText("Population of Az is " + JStates[0] + " and area: " + area[0]); break; case "Ca": lbl.setText("Population of Az is " + JStates[0] + " and area: " + area[0]); break; case "Nv": lbl.setText("Population of Az is " + JStates[0] + " and area: " + area[0]); break; case "Ut": lbl.setText("Population of Az is " + JStates[0] + " and area: " + area[0]); break; case "Nm": lbl.setText("Population of Az is " + JStates[0] + " and area: " + area[0]); break; } } } }

//ERROR

Exception in thread "main" java.util.InputMismatchException at java.util.Scanner.throwFor(Scanner.java:864) at java.util.Scanner.next(Scanner.java:1485) at java.util.Scanner.nextInt(Scanner.java:2117) at java.util.Scanner.nextInt(Scanner.java:2076) at j.states.JStates.main(JStates.java:32) /Users/azgoat/Library/Caches/NetBeans/8.2/executor-snippets/run.xml:53: Java returned: 1 BUILD FAILED (total time: 2 minutes 25 seconds)