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public class Final extends JFrame { private double total ; private double total2

ID: 3827847 • Letter: P

Question

public class Final extends JFrame
{
   private double total ;
   private double total2;
   private double total3;

   private final int sides = 3;
   private int value;
   private int value2;
   private int value3;
   private JPanel panel;
   private JLabel Win;
   private JLabel endLabel;
   private JLabel AmountLabel;
   private JLabel totalAmount;
   private JLabel imageLabel1;
   private JLabel imageLabel2;
   private JLabel imageLabel3;
   private JTextField EnteredMoney;
   private JTextField endMoney;
   private JTextField totalMoney;
   private JButton Amount;
   private final int WINDOW_WIDTH = 5000;
   private final int WINDOW_HEIGHT = 300;
   private Window1 window;

   public Final()
   {
       setTitle("Dice Simulator");

       setSize(WINDOW_WIDTH, WINDOW_HEIGHT);

       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

       buildPanel();

       setVisible(true);
   }

   public void buildPanel()
   {
       AmountLabel = new JLabel("Amount Inserted: $");

       EnteredMoney = new JTextField(10);

       endLabel = new JLabel("You have won: $");

       endMoney = new JTextField(10);

       endMoney.setEditable(false);

       totalAmount = new JLabel("Total amount won is");

       totalMoney = new JTextField(10);

       totalMoney.setEditable(false);

       imageLabel1 = new JLabel();

       imageLabel2 = new JLabel();

       imageLabel3 = new JLabel();

       Amount = new JButton("Spin");

       Amount.addActionListener(new AmountListener());

       JPanel panel = new JPanel();
       JPanel panel2 = new JPanel();
       JPanel panel3 = new JPanel();
       JPanel panel4 = new JPanel();

       panel = new JPanel();
       panel2 = new JPanel();
       panel3 = new JPanel();
       panel4 = new JPanel();

       panel.add(AmountLabel);
       panel.add(EnteredMoney);
       panel.add(endLabel);
       panel.add(endMoney);
       panel.add(totalAmount);
       panel.add(totalMoney);
       panel2.add(imageLabel1);
       panel2.add(imageLabel2);
       panel4.add(imageLabel3);
       panel3.add(Amount);

       add(panel,BorderLayout.WEST);
       add(panel2,BorderLayout.NORTH);
       add(panel3,BorderLayout.SOUTH);
       add(panel4,BorderLayout.EAST);


   }

   private class AmountListener implements ActionListener
   {
       public void actionPerformed(ActionEvent e)
       {

           NatoliSlot Roll = new NatoliSlot();


           value = Roll.getValue();
           value2 = Roll.getValue2();
           value3 = Roll.getValue3();

           String Emoney ="";
           double eMoney = 0.0;

           double Doubel =0.0;

           Emoney = EnteredMoney.getText();

           eMoney = Double.parseDouble(Emoney);


           switch(value)
           {
               case 1 :
               ImageIcon set = new ImageIcon("cherry.jpg");
               imageLabel1.setIcon(set);
               break;

               case 2:
               ImageIcon set2 = new ImageIcon("lemon.png");
               imageLabel1.setIcon(set2);
               break;

               case 3:
               ImageIcon set3 = new ImageIcon("watermelon.jpg");
               imageLabel1.setIcon(set3);
               break;


           }//end of vlaue switch

           switch(value2)
           {
               case 1 :
               ImageIcon set = new ImageIcon("cherry.jpg");
               imageLabel2.setIcon(set);
               break;

               case 2:
               ImageIcon set2 = new ImageIcon("lemon.png");
               imageLabel2.setIcon(set2);
               break;

               case 3:
               ImageIcon set3 = new ImageIcon("watermelon.jpg");
               imageLabel2.setIcon(set3);
               break;


           }// end of value2 switch

           switch(value3)
           {
               case 1 :
               ImageIcon set = new ImageIcon("cherry.jpg");
               imageLabel3.setIcon(set);
               break;

               case 2:
               ImageIcon set2 = new ImageIcon("lemon.png");
               imageLabel3.setIcon(set2);
               break;

               case 3:
               ImageIcon set3 = new ImageIcon("watermelon.jpg");
               imageLabel3.setIcon(set3);
               break;
           }// end of value3 switch

           DoubleScore D = new DoubleScore();
           total3 = D.setNum(eMoney,value,value2,value3);
           endMoney.setText(String.format("%f",(total3)));
           total+=total3;
           totalMoney.setText(String.format("%f",(total)));

           if(total3 >0)
           {
               window = new Window1();
               window.setVisible(true);

           }

       }

   }
   public static void main(String [] args)
   {
               new Final();
       }

}

public class Window1 extends JFrame
{
   private JPanel panel;
   private JButton Exit;
   private JButton Again;
   private JLabel Win;

   private final int WINDOW_WIDTH = 500;
   private final int WINDOW_HEIGHT = 300;

   public Window1()
   {
       setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
       setLayout(new BorderLayout());
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       buildPanel1();
       playSound();
       setVisible(false);

   }

   public void buildPanel1()
   {

       Exit = new JButton("Cash Out");
       Exit.addActionListener(new ExitListener());
       Again = new JButton("Spin Again");
       Again.addActionListener(new AgainListener());
       ImageIcon set = new ImageIcon("Jackpot.jpg");
       Win.setIcon(set);

       JPanel panel = new JPanel();
       JPanel panel2 = new JPanel();
       JPanel panel3 = new JPanel();
       panel = new JPanel();
       panel2 = new JPanel();
       panel3 = new JPanel();

       panel.add(Again);
       panel2.add(Exit);
       panel2.add(Win);

       add(panel,BorderLayout.NORTH);
       add(panel2,BorderLayout.SOUTH);

   }

   public void playSound()
   {

       try
           {
               AudioInputStream audioIn = AudioSystem.getAudioInputStream(Window1.class.getResource("Coins_sound_effect.wav"));
               Clip clip = AudioSystem.getClip();
               clip.open(audioIn);
               clip.start();
           }

       catch(Exception e)
       {
           System.out.println("The sound file does not exist!!!");
       }
   }

   private class ExitListener implements ActionListener
   {
           public void actionPerformed(ActionEvent e)
       {
           System.exit(0);

       }
   }

   private class AgainListener implements ActionListener
   {
       public void actionPerformed(ActionEvent e)
       {
           setVisible(false);

       }

   }

}

I dont know why this error, Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException is happening? I had the prgram working befor but I dont know what happend.

Explanation / Answer

/*I Have implemented to two Classes Which were missing in the Program.*/
/*app is the package i have used.*/

/*Final.java file*/
package app;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import app.Window1.AgainListener;
import app.Window1.ExitListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Final extends JFrame
{
    private double total ;
    private double total2;
    private double total3;
    private final int sides = 3;
    private int value;
    private int value2;
    private int value3;
    private JPanel panel;
    private JLabel Win;
    private JLabel endLabel;
    private JLabel AmountLabel;
    private JLabel totalAmount;
    private JLabel imageLabel1;
    private JLabel imageLabel2;
    private JLabel imageLabel3;
    private JTextField EnteredMoney;
    private JTextField endMoney;
    private JTextField totalMoney;
    private JButton Amount;
    private final int WINDOW_WIDTH = 5000;
    private final int WINDOW_HEIGHT = 300;
    private Window1 window;
    public Final()
    {
        setTitle("Dice Simulator");
        setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        buildPanel();
        setVisible(true);
    }
    public void buildPanel()
    {
        AmountLabel = new JLabel("Amount Inserted: $");
        EnteredMoney = new JTextField(10);
        endLabel = new JLabel("You have won: $");
        endMoney = new JTextField(10);
        endMoney.setEditable(false);
        totalAmount = new JLabel("Total amount won is");
        totalMoney = new JTextField(10);
        totalMoney.setEditable(false);
        imageLabel1 = new JLabel();
        imageLabel2 = new JLabel();
        imageLabel3 = new JLabel();
        Amount = new JButton("Spin");
        Amount.addActionListener(new AmountListener());
        JPanel panel = new JPanel();
        JPanel panel2 = new JPanel();
        JPanel panel3 = new JPanel();
        JPanel panel4 = new JPanel();
        panel = new JPanel();
        panel2 = new JPanel();
        panel3 = new JPanel();
        panel4 = new JPanel();
        panel.add(AmountLabel);
        panel.add(EnteredMoney);
        panel.add(endLabel);
        panel.add(endMoney);
        panel.add(totalAmount);
        panel.add(totalMoney);
        panel2.add(imageLabel1);
        panel2.add(imageLabel2);
        panel4.add(imageLabel3);
        panel3.add(Amount);
        add(panel,BorderLayout.WEST);
        add(panel2,BorderLayout.NORTH);
        add(panel3,BorderLayout.SOUTH);
        add(panel4,BorderLayout.EAST);
   }
    private class AmountListener implements ActionListener
    {
       public void actionPerformed(ActionEvent e)
        {
            NatoliSlot Roll = new NatoliSlot();
            value = Roll.getValue();
            value2 = Roll.getValue2();
            value3 = Roll.getValue3();
            String Emoney ="";
            double eMoney = 0.0;
            double Doubel =0.0;
            Emoney = EnteredMoney.getText();
            eMoney = Double.parseDouble(Emoney);
            switch(value)
            {
                case 1 :
                ImageIcon set = new ImageIcon("cherry.jpg");
                imageLabel1.setIcon(set);
                break;
                case 2:
                ImageIcon set2 = new ImageIcon("lemon.png");
                imageLabel1.setIcon(set2);
                break;
                case 3:
                ImageIcon set3 = new ImageIcon("watermelon.jpg");
                imageLabel1.setIcon(set3);
                break;
            }//end of vlaue switch
            switch(value2)
            {
                case 1 :
                ImageIcon set = new ImageIcon("cherry.jpg");
                imageLabel2.setIcon(set);
                break;
                case 2:
                ImageIcon set2 = new ImageIcon("lemon.png");
                imageLabel2.setIcon(set2);
                break;
                case 3:
                ImageIcon set3 = new ImageIcon("watermelon.jpg");
                imageLabel2.setIcon(set3);
                break;

            }// end of value2 switch

            switch(value3)
            {
                case 1 :
                ImageIcon set = new ImageIcon("cherry.jpg");
                imageLabel3.setIcon(set);
                break;
                case 2:
                ImageIcon set2 = new ImageIcon("lemon.png");
                imageLabel3.setIcon(set2);
                break;
                case 3:
                ImageIcon set3 = new ImageIcon("watermelon.jpg");
                imageLabel3.setIcon(set3);
                break;
            }// end of value3 switch

            DoubleScore D = new DoubleScore();
            total3 = D.setNum(eMoney,value,value2,value3);
            endMoney.setText(String.format("%f",(total3)));
            total+=total3;
            totalMoney.setText(String.format("%f",(total)));
            if(total3 >0)
            {
                window = new Window1();
                window.setVisible(true);

            }

        }
    }
    public static void main(String [] args)
    {
                new Final();
   }
}

/*Window1.java file*/
package app;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Window1 extends JFrame
{
    private JPanel panel;
    private JButton Exit;
    private JButton Again;
    private JLabel Win;
    private final int WINDOW_WIDTH = 500;
    private final int WINDOW_HEIGHT = 300;
    public Window1()
    {
        setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
        setLayout(new BorderLayout());
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        buildPanel1();
        playSound();
        setVisible(false);
    }
    public void buildPanel1()
    {
        Exit = new JButton("Cash Out");
        Exit.addActionListener(new ExitListener());
        Again = new JButton("Spin Again");
        Again.addActionListener(new AgainListener());
        ImageIcon set = new ImageIcon("Jackpot.jpg");
        Win.setIcon(set);
        JPanel panel = new JPanel();
        JPanel panel2 = new JPanel();
        JPanel panel3 = new JPanel();
        panel = new JPanel();
        panel2 = new JPanel();
        panel3 = new JPanel();
        panel.add(Again);
        panel2.add(Exit);
        panel2.add(Win);
        add(panel,BorderLayout.NORTH);
        add(panel2,BorderLayout.SOUTH);
     }
    public void playSound()
    {
        try
            {
                AudioInputStream audioIn = AudioSystem.getAudioInputStream(Window1.class.getResource("Coins_sound_effect.wav"));
                Clip clip = AudioSystem.getClip();
                clip.open(audioIn);
                clip.start();
            }

        catch(Exception e)
        {
            System.out.println("The sound file does not exist!!!");
        }
    }
    public class AgainListener implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {
            setVisible(false);

        }
    }
    public class ExitListener implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {
            System.exit(0);
        }
    }
}

/*DoubleScore.java*/
package app;
public class DoubleScore
{
   private double num;
   private int value;
   private int value2;
   private int value3;
   public double setNum(double total, int value, int value2, int value3)
   {
           if (value == 1 && value2 ==1 && value3==1)
           {
               num = Math.pow(total, 3);
           }
               else if(value == 2 && value2 ==2 && value3 == 2)
               {
                   num = Math.pow(total, 3);
               }
               else if(value ==3 && value2 ==3 && value3 ==3)
               {
                   num = Math.pow(total, 3);
               }
           if(value ==1 && value2 ==1 && value3 == 2)
           {
               num = Math.pow(total, 2);
           }
               else if(value ==1 && value2 ==1 && value3 == 3)
               {
                   num = Math.pow(total, 2);
               }
           if(value ==1 && value3 ==1 && value2 == 2)
           {
               num = Math.pow(total, 2);
           }
               else if(value ==1 && value3 ==1 && value2 == 3)
               {
                   num = Math.pow(total, 2);
               }
           if(value2 ==1 && value3 ==1 && value == 2)
           {
               num = Math.pow(total, 2);
           }
               else if(value2 ==1 && value3 ==1 && value == 3)
               {
                   num = Math.pow(total, 2);
               }
           if(value ==2 && value2 ==2 && value3 ==1)
           {
               num = Math.pow(total, 2);
           }
               else if(value ==2 && value2 ==2 && value3 == 3)
               {
                   num = Math.pow(total, 2);
               }
           if(value ==2 && value3 ==2 && value2 == 1)
           {
               num = Math.pow(total, 2);
           }
               else if(value ==2 && value3 ==2 && value2 == 3)
               {
                   num = Math.pow(total, 2);
               }
           if(value2 ==2 && value3 ==2 && value == 3)
           {
               num = Math.pow(total, 2);
           }
               else if(value2 ==2 && value3 ==2 && value ==1)
               {
                   num = Math.pow(total, 2);
               }
           if(value ==3 && value2 ==3 && value3 == 1)
           {
               num = Math.pow(total, 2);
           }
               else if(value ==3 && value2 ==3 && value3 == 2)
               {
                   num = Math.pow(total, 2);
               }
           if(value ==3 && value3 ==3 && value2 == 1)
           {
                   num = Math.pow(total, 2);
           }
               else if(value ==3 && value3 ==3 && value2 == 2)
               {
                   num = Math.pow(total, 2);
               }
           if(value2 ==3 && value3 ==3 && value == 1)
           {
               num = Math.pow(total, 2);
           }
               if(value2 ==3 && value3 ==3 && value == 2)
               {
                       num = Math.pow(total, 2);
               }
       return num;
   }
}

/*Natolist.java*/
package app;
import java.util.Random;
public class NatoliSlot
{
   private int sides =3;
   private int value;
   private int value2;
   private int value3;
    public NatoliSlot()
   {
   roll();
}
// Storing sides into value
   public void roll( )
   {
       Random rand = new Random();
       value = rand.nextInt(sides)+1;
       value2 = rand.nextInt(sides)+1;
       value3 = rand.nextInt(sides)+1;
   }
   public void setvalue(int Value)
   {
       value = Value;
   }
   public void setvalue2(int Value2)
   {
       value2 = Value2;
   }
   public void setvalue3(int Value3)
   {
       value3 = Value3;
   }
   public int getValue()
   {
       return value;
   }
   public int getValue2()
   {
       return value2;
   }
   public int getValue3()
   {
       return value3;
   }
}//End of class

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