import java.awt.Color;
import javax.swing.JOptionPane;

/**
*
* @filename : Project2.java
* @author :
* @date :
* @description:
*    It contains the main method. It should generate the GUI
   After entering the information about the make and model, its
   sales price and the type of the automobile, clicking the
   Compute Sales Tax button should display the sales tax in the
   text field to its right. In addition, the object should be stored
   in an array of type Automobile. That array should allow
   space for up to the last five automobiles entered.
   If non integer values are entering in any of the fields that
   require integers, an error message should be displayed in a
   JOptionPane window.
   Clicking the Clear Fields button should clear all text fields.
   Clicking the Display Report button should produce a report
   on the console that includes the information about all the
   automobiles currently stored in the array
*
*/
public class Project2 extends javax.swing.JFrame
{

/**
* Creates new form Project2
*/
public Project2()
{
   initComponents();
   getContentPane().setBackground(new Color(238, 238, 238));
}

/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents()
{

   buttonGroup1 = new javax.swing.ButtonGroup();
   buttonGroup2 = new javax.swing.ButtonGroup();
   jLabel1 = new javax.swing.JLabel();
   txtMakeAndModel = new javax.swing.JTextField();
   jLabel2 = new javax.swing.JLabel();
   txtSalesPrice = new javax.swing.JTextField();
   jPanel1 = new javax.swing.JPanel();
   rbHybrid = new javax.swing.JRadioButton();
   rbElectric = new javax.swing.JRadioButton();
   rbOther = new javax.swing.JRadioButton();
   jLabel3 = new javax.swing.JLabel();
   txtMPG = new javax.swing.JTextField();
   txtWeight = new javax.swing.JTextField();
   jLabel4 = new javax.swing.JLabel();
   btnClear = new javax.swing.JButton();
   btnDisplay = new javax.swing.JButton();
   btnCompute = new javax.swing.JButton();
   txtSalesTax = new javax.swing.JTextField();

   setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
   setTitle("Automobile Sales Tax Calculator");
   setBackground(new java.awt.Color(255, 255, 255));

   jLabel1.setFont(new java.awt.Font("Arial", 1, 14)); // NOI18N
   jLabel1.setText("Make and Model");

   txtMakeAndModel.setFont(new java.awt.Font("Arial", 0, 14)); // NOI18N
   txtMakeAndModel.setBorder(javax.swing.BorderFactory.createEtchedBorder());

   jLabel2.setFont(new java.awt.Font("Arial", 1, 14)); // NOI18N
   jLabel2.setText("Sales Price");

   txtSalesPrice.setFont(new java.awt.Font("Arial", 0, 14)); // NOI18N
   txtSalesPrice.setBorder(javax.swing.BorderFactory.createEtchedBorder());

   jPanel1.setBackground(new java.awt.Color(238, 238, 238));
   jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(184, 207, 229), new java.awt.Color(184, 207, 229), new java.awt.Color(184, 207, 229), new java.awt.Color(184, 207, 229)), "Automobile Type", javax.swing.border.TitledBorder.LEFT, javax.swing.border.TitledBorder.TOP, new java.awt.Font("Arial", 1, 14))); // NOI18N

   buttonGroup1.add(rbHybrid);
   rbHybrid.setFont(new java.awt.Font("Arial", 1, 14)); // NOI18N
   rbHybrid.setText("Hybrid");

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