import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class HUD extends JFrame
{
  
   String number="";
   int speed = 0;
   JPanel mainPanel = new JPanel();
   JPanel sidePanel = new JPanel(new GridLayout(3,2));

   JPanel displayPanel = new JPanel(new FlowLayout());
   JTextField output = new JTextField(10);
   JButton jbAccelerate = new JButton("Accelerate");
   JButton jbNos = new JButton("NOS\n\rNitrous Oxide Systems");
   javax.swing.Timer t;
   javax.swing.Timer f;
   
   boolean accelerating=false;
   boolean boost=false;
        
public HUD()
{
      this.setContentPane(mainPanel);
       
      mainPanel.add(displayPanel);
      mainPanel.add(sidePanel);
      
      sidePanel.add(jbNos);
      mainPanel.add(output);
      sidePanel.add(jbAccelerate);
      pack();
      
      jbAccelerate.addActionListener(new ActionListener()
      {
        public void actionPerformed(ActionEvent e)
            {
             if(accelerating==true)
            {
          t.stop();
             accelerating = false;
            }
              else{
           t.restart();
                 accelerating = true;
             }
              if (speed==256)
                    {
                      t.stop();
                      f.stop();
                      accelerating=false;
                      boost=false;
                    }      
          }
       }
    );
      
 t = new javax.swing.Timer(100, new ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    if(accelerating==true)
                    {
                        speed = speed + 1;
                    }
                    else{
                        speed = speed - 10;
                    }
                    
                   while(speed>255)
                    {
                        speed = speed - 3;  
                    }
                    
                    speed++;
                    System.out.println("Timer start: speed now equals: "+speed+ "Kmph");
                    updateDisplay();
                    
                   
                    output.setText(speed+"Kmph");
                    updateDisplay();
//                     if(e.getSource()==jbAccelerate)
//                     { btnNum
//                     }
                    
                }
            }
            );
     

      
    
        jbNos.addActionListener(new ActionListener()
                {
                    public void actionPerformed(ActionEvent e) ////must override this methods
                    {
                        
                        
                        if (boost==true)
                    {
                        t.stop();
                        f.restart();
                        System.out.println("NOS - Activated");
                    }else{ System.out.println("NOS - Deactivated");
                    }
                       
                    if(boost==true)
            {
          f.stop();
          t.restart();
             boost = false;
            }
              else{
           f.restart();
           t.stop();
                 boost = true;
                 System.out.println("NOS - Deactivated");
                        
                    }
                 }
                }
            );

         f = new javax.swing.Timer(25, new ActionListener()
         {
                public void actionPerformed(ActionEvent e)
                {
                    
                    
                    if(accelerating==true)
                    {
                        speed = speed + 1;
                    }
                    else{
                        speed = speed - 1;
                    
                }
                    
                    
                 
                while(speed>255)
                    {
                        speed = speed - 3;
                        
                    }
                    speed++;
                    System.out.println("Timer start: speed now equals: "+speed+ "Kmph");
                    updateDisplay();
                    
                    output.setText(speed+"Kmph");
                    updateDisplay();
                }
                }
    
);
  }
    public void updateDisplay()
    {
        number = number.valueOf(speed);
                        
    }
}
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Main
{
public static void main(String[] args)
    {
         
        JFrame HUD = new HUD();
        HUD.setSize(500,400);
        HUD.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        HUD.setVisible(true);
       
            
        }
    }