Помощь в составлении программы

public class Main {
 
    public static void main(String[] args) throws IOException
    {
    // write your code here
      class Periferal
     {
         private String name = null;
         private String type_of_int = null;
         private int color;
         private double chernil;
       //  public void print()
       //  {
       //      String s = "123";// Предположем, что это наш документ
       //      s.print();
       //  }
         public String getName()
         {
           return name;
         }
 
         public void Sost_of_periferal(double chernil)
         {
             if (chernil == 0)
                 System.out.println("Чернил нет");
             else
                 System.out.println("Чернила есть. Продолжение печати!");
         }
 
         public Periferal (String name, String type_of_int, int color, double chernil)
         {
             this.name = name;
             this.type_of_int = type_of_int;
             this.color = color;
             this.chernil = chernil;
         }
     }
        Periferal printer = new Periferal("Canon_123", "output", 4, 0.05);
       System.out.println( printer.getName());
        printer.Sost_of_periferal(printer.chernil);
    }
}

public class Application {
 
    public static void main(String[] args) {
 
        Printer printer = new Printer("HP LaserJet M1005", ConnectionType.USB,"2400x2400dpi", 64000l, 500l);
        Document document = new Document("My Java CV", 500l);
        Document document2 = new Document("Another document", 150l);
        System.out.println("Printer info: " + printer);
        
        try {
            printer.sendToPrint(document);
            printer.sendToPrint(document2);
        } catch (PrinterException e) {
            System.out.println("Cannot print document. " + e.getMessage());
        }
 
    }
}

public interface Device {
    String getName();
    ConnectionType getType();
}

public class Printer implements Device {
    
    private String name;
    private ConnectionType connectionType;
    private String resolution;
    private Long colorAmount;
    private Long inkAmount;
    private PrinterState state = PrinterState.FREE;
    
    
    public Printer(String name, ConnectionType connectionType, String resolution, Long colorAmount, Long inkAmount) {
        this.name = name;
        this.connectionType = connectionType;
        this.resolution = resolution;
        this.colorAmount = colorAmount;
        this.inkAmount = inkAmount;
    }
 
 
 
    public String getName() {
        return name;
    }
 
    public ConnectionType getType() {
        return connectionType;
    }
    
    public synchronized void sendToPrint(Document document) throws PrinterException {
        state = PrinterState.BUSY;
        checkInkAmount();
        System.out.println("Printing document: " + document.getName());
        inkAmount -= document.getInkAmountNeeded();
        sleep(1000);
        state = PrinterState.FREE;
    }
 
 
 
    private void checkInkAmount() throws PrinterException {
        if(inkAmount <= 0) {
            throw new PrinterException("Printer is out of ink");
        }
    }
 
    private void sleep(int i) {
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
    
 
    public ConnectionType getConnectionType() {
        return connectionType;
    }
 
 
 
    public void setConnectionType(ConnectionType connectionType) {
        this.connectionType = connectionType;
    }
 
 
 
    public String getResolution() {
        return resolution;
    }
 
 
 
    public void setResolution(String resolution) {
        this.resolution = resolution;
    }
 
 
 
    public Long getColorAmount() {
        return colorAmount;
    }
 
 
 
    public void setColorAmount(Long colorAmount) {
        this.colorAmount = colorAmount;
    }
 
 
 
    public Long getInkAmount() {
        return inkAmount;
    }
 
 
 
    public void setInkAmount(Long inkAmount) {
        this.inkAmount = inkAmount;
    }
 
 
 
    public PrinterState getState() {
        return state;
    }
 
 
 
    public void setState(PrinterState state) {
        this.state = state;
    }
 
 
 
    public void setName(String name) {
        this.name = name;
    }
 
 
 
    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append("Printer [name=").append(name)
                .append(", connectionType=").append(connectionType)
                .append(", resolution=").append(resolution)
                .append(", colorAmount=").append(colorAmount)
                .append(", inkAmount=").append(inkAmount).append(", state=")
                .append(state).append("]");
        return builder.toString();
    }
 
 
}

public class Document {
    
    private String name;
    private Long inkAmountNeeded;
    
    public Document(String name, Long inkAmountNeeded) {
        super();
        this.name = name;
        this.setInkAmountNeeded(inkAmountNeeded);
    }
    
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public Long getInkAmountNeeded() {
        return inkAmountNeeded;
    }
 
    public void setInkAmountNeeded(Long inkAmountNeeded) {
        this.inkAmountNeeded = inkAmountNeeded;
    }
 
}

public class PrinterException extends Exception {
    
    private static final long serialVersionUID = -2779404737671039535L;
 
    public PrinterException(String message) {
        super(message);
    }
}

public enum PrinterState {
    BUSY,
    FREE
}

public enum ConnectionType {
    
    USB,
    PARALLEL,
    SERIAL
}