JAVA: Implementing a Demo/Tester Program : I have a project for my java programming course. 

The **instructions** are that we  have to create a simple class and a tester class, and the class must include  a Default constructor; Parameterized constructor with three parameters (make, model and price); Accessor method called getMake( ) to return the make; Accessor method called getModel( ) to return the model; Accessor method called getPrice( ) to return the price; Mutator method setMake( String newMake) to set the make; Mutator method setModel( String newModel) to set the model; and a Mutator method setPrice( double newPrice ) to set the price.. 

I have created my class and tester program, and my class compiles perfectly. *When I try to run it, though get the error that there is no main method*. Now, I followed my professor's example for the tester program and I get several errors on that. If anyone could give me the a pointer in the right direction, I would appreciate it. 

**My question is this: How do I implement my tester program?** Do I need to create a zip file? I've tried doing so and didn't seem to help much...

The following is my code for the class: 

        public class Automobile
        { 
         private String make;	
         private String model;
	     private double price;	
		
       public Automobile()
      {
         make = "Lexus2017";
         model = "RX";
      }
		
     public Automobile(String initMake, String initModel, double initPrice)
    {
       make = initMake;
      model = initModel;
      price = initPrice; 
    }

    public String getMake()
    {
      return make;
    }
   
    public String getModel()
    {
      return model;
    }
	
    public double getPrice()
    {
      return price;
    }	
   	
    public void setMake(String newMake)
    {
      make = newMake;
    }
   
		
    public void setModel(String newModel)
    {
      model = newModel;
    }

Also, the following is my tester class(the one that has a lot of errors): 

    public class AutomobileTester
    {
 
     public static void main(String[] args)
     {
      Automobile make = new Automobile("Lexus 2017");
      System.out.println("The car is " + make.getMake());
   
      Automobile model = new Automobile("RX");
      System.out.println("The car is " + Automobile.getModel());
         
   	   
      Automobile price = new Automobile("43020"); 
      System.out.println("The car is " + Automobile.getPrice());  
         
         
     // Use the mutator to change the make variable
      Automobile.setMake("Lexus 2017");
      System.out.println("The car is " + backDoor.getState());
      
     // Use the mutator to change the model variable
      Automobile.setModel("RX");
      System.out.println("The car is called " + backDoor.getName());
     
      Automobile.setPrice("43020");
      System.out.println("The car is " + price.getPrice());

     }
    }

*This is my first time working with constructors, and I'm very new to Java, so I'm sorry for any obvious errors. Thank you ahead of time for your time and help.*