In java GUI Design a Ship class with the following information: Name Year A cons

Question

In java GUI

Design a Ship class with the following information:

Name

Year

A constructor and appropriate accessors and mutators

toString method

A speed method to calculate/determine the spped(generate a random value for the speed between 30 – 50 knots per hour).

Design a CruiseShip class that extends the Ship class. The CruiseShip class will have the following:

Maximum passengers

A constructor and appropriate accessors and mutators

A toString that displays the ship’s name and number of passengers. (override the base class toString)

Override the speed method where the speed = (random value between 50 – 70) – (.1 * # passengers * 200). If the value is negative take the absolute value

Design a CargoShip class that extends the Ship class. The CargoShip class will have the following:

Cargo capacity

A constructor and appropriate accessors and mutators

A toString that displays the ship’s name and capacity. (override the base class toString)

Override the speed method where the speed = (random value between 40 – 50) – (.001 * cargo size)

Demonstrate the classes in a GUI program that has a Ship array. Assign the various ships to the array and allow the user to step through the array.

Your application will be able to read a text file containing ship information. The data file will be in the following format, where each data member is separated by a colon:For a ship:

<ship_type>:<ship_name>:<ship_year>

For a CruiseShip:

<ship_type>:<ship_name>:<max_passengers>

For a CargoShip:

<ship_type>:<ship_name>:<cargo_capacity>

The ship type is a number in the range listed below. A type number out of this range can be ignored.

<ship_type>

Range

Ship

1-49

CruiseShip

100-200

CargoShip

50-99

<ship_type>

Range

Ship

1-49

CruiseShip

100-200

CargoShip

50-99

Explanation / Answer

Ship.java

import java.util.Random;

//creating Ship class with required properties
class Ship{
   private String name;
   private int year;
   //constructor initializes instance vars
   public Ship(String name,int year){
       this.name = name;
       this.year = year;
   }
   //constructor initializes instance vars with default values
   public Ship(){
       this.name = "";
       this.year = 0;
   }
  
   //setters
   public void setName(String name){
       this.name = name;
   }
   public void setYear(int year){
       this.year = year;
   }
  
   //getters
   public String getName(){
       return this.name;
   }
   public int getYear(){
       return this.year;
   }
   //overrides toString method in Object class
   public String toString(){
       return "";
   }
   //calculates speed using Random class and returns
   public int calculateSpeed(){
       Random r = new Random();
       int no = r.nextInt(21);
       no+=30;
       return no;
   }
}

CruiseShip.java

import java.util.Random;
//this class inherits properties of Ship class also
class CruiseShip extends Ship{
   private int maxPassengers;
   //constructor initializes instance vars
   public CruiseShip(String name,int maxPas){
       this.maxPassengers = maxPas;
       this.setName(name);
   }
  
   //setter
   public void setMaxPassengers(int maxP){
       this.maxPassengers = maxP;
   }
  
   //getter
   public int getMaxPassengers(){
       return this.maxPassengers;
   }
   //overrides toString method in Ship class
   public String toString(){
       return getName()+" "+this.maxPassengers;
   }
   //calculates speed using Random class and returns
   public int calculateSpeed(){
       Random r = new Random();
       int no = r.nextInt(21);
       no+=50;
       int val = (int)0.1*maxPassengers*200;
      
      
       return Math.abs(no-val);
   }
}

CargoShip.java

import java.util.Random;
//this class inherits properties of Ship class also

class CargoShip extends Ship{
   private int cargoCapacity;
   //constructor initializes instance vars
   public CargoShip(String name,int cCapacity){
       this.cargoCapacity = cCapacity;
       this.setName(name);
   }
  
   //setter
   public void setCargoCapacity(int cc){
       this.cargoCapacity = cc;
   }
  
   //getter
   public int getCargoCapacity(){
       return this.cargoCapacity;
   }
   //overrides toString method in Ship class
   public String toString(){
       return getName()+" "+this.cargoCapacity;
   }
   //calculates speed using Random class and returns
   public int calculateSpeed(){
       Random r = new Random();
       int no = r.nextInt(11);
       no+=40;
       int val = (int)0.001*cargoCapacity;
      
       return Math.abs(no-val);
   }
}

GUIProgram.java

import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.JOptionPane;
//this GUIProgram class takes input a name of text file and reads and creates different types of ships and add them to ships array.
class GUIProgram extends JFrame implements ActionListener{
   ArrayList<Ship> ships = new ArrayList<Ship>();//arraylist of ships
   JLabel enterFile;//prints message "Enter file name"
   JTextField fileName;//takes file name
   JButton enter;//initializes the task of reading input file and add ships to ships array
   public GUIProgram(){
       Container c = getContentPane();
       setLayout(new FlowLayout());
      
       enterFile = new JLabel("Enter file name:");
       fileName = new JTextField(20);
       enter = new JButton("Submit");
       //adding action listener to button
       enter.addActionListener(this);
       //adding elements to frame
       add(enterFile);
       add(fileName);
       add(enter);
      
   }
   public static void main(String a[]){
       GUIProgram gui = new GUIProgram();
       gui.setSize(900,500);//frame size
        gui.setResizable(false);
        gui.setTitle("Adding Different Ships");//title for frame
        gui.setVisible(true);
        gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   }
   public void actionPerformed(ActionEvent ae){
       if(!fileName.getText().trim().equals("")){//we will go for reading file only if the content in text field is not empty
           readFile(fileName.getText().trim());//reads file and add ships to ships array
       }
   }
   public void readFile(String fileName){
       //reads file and add ships to ships array
       try{
           FileReader txtfile = null;
           BufferedReader br = null;
           StringBuilder sb = null;
           txtfile = new FileReader(fileName);
           br = new BufferedReader(txtfile);
           sb = new StringBuilder();
           String line = br.readLine();
           while (line != null) {
              
               String str[] = line.split(":");//splitting contents of a line
               int shipType = Integer.parseInt(str[0]);
               int num = Integer.parseInt(str[2]);
               Ship ship = null;
               //based on value of shiptype we will create different types of ships
               if(shipType>=1 && shipType<=49){
                   ship = new Ship(str[1],num);
               }
               else if(shipType>=100 && shipType<=200){
                   ship = new CruiseShip(str[1],num);
               }
               else if(shipType>=50 && shipType<=99){
                   ship = new CargoShip(str[1],num);
               }
               if(ship!=null)//we will add this ship to ships array only if it is instantiated
               ships.add(ship);
               line = br.readLine();
           }
           br.close();
           txtfile.close();
           //displaying message that reading and adding completed!!
           JOptionPane.showMessageDialog(null,"All ships are added to ships array","FileRead completed!",JOptionPane.WARNING_MESSAGE);
       }
       catch(IOException e){
           //if some error occur in file reading
           System.out.println("Some error in reading input file!!!");
       }
   }
}

Thankyou...

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