Class Car • extends MotorVehicle • concrete class one field trunkCapacity • Overloaded constructor: o Explicitly call super(String, int) passing values into super class o set value into field from last parameter for trunkCapacity o System.out.printin("Returning from Car constructor"); • No parameters constructor: o Use a chained constructor call with this) • Set manufacturer to "UnknownCar", set top speed to 100, trunk capacity to 1 o System.out.printin("Returning from default Car constructor"); toString o @Override o Use a StringBuilder to append the String returned from the superclasses toString o Then append the trunkCapacity o Return the string Class Truck • extends MotorVehicle • concrete class • one field towingCapacity • Overloaded constructor: o Explicitly call super(String, int) passing values into super class o set value into field from last parameter for towingCapacity o System.out.println("Returning from Truck constructor"); No parameters constructor: o Use a chained constructor call with this() • Set manufacturer to "UnknownTruck", set top speed to 95, towing capacity to 11,000 o System.out.println("Returning from default Truck constructor"); toString o @Override o Use a StringBuilder to append the String returned from the superclasses toString o Then append the towingCapacity o Return the string public class TestMotorVehicles { public static void main(String[j args){ // MotorVehicle mvli - new MotorVehicle(); // Cannot instantiate abstract class System.out.println(mv1); System.out.println(); MotorVehicle mv2 - new Car(); System.out.println(mv2); // MotorVehicle mv3 - new Car("SampleData1", 125, 2); System.out.println(mv3); System.out.println(); MotorVehicle mv4 - 'new Truck(); System.out.println(mv4); System.out.println(); MotorVehicle mvs - new Truck("SampleData2", 95, 12000); System.out.println(mv5); System.out.println();
Class Car • extends MotorVehicle • concrete class one field trunkCapacity • Overloaded constructor: o Explicitly call super(String, int) passing values into super class o set value into field from last parameter for trunkCapacity o System.out.printin("Returning from Car constructor"); • No parameters constructor: o Use a chained constructor call with this) • Set manufacturer to "UnknownCar", set top speed to 100, trunk capacity to 1 o System.out.printin("Returning from default Car constructor"); toString o @Override o Use a StringBuilder to append the String returned from the superclasses toString o Then append the trunkCapacity o Return the string Class Truck • extends MotorVehicle • concrete class • one field towingCapacity • Overloaded constructor: o Explicitly call super(String, int) passing values into super class o set value into field from last parameter for towingCapacity o System.out.println("Returning from Truck constructor"); No parameters constructor: o Use a chained constructor call with this() • Set manufacturer to "UnknownTruck", set top speed to 95, towing capacity to 11,000 o System.out.println("Returning from default Truck constructor"); toString o @Override o Use a StringBuilder to append the String returned from the superclasses toString o Then append the towingCapacity o Return the string public class TestMotorVehicles { public static void main(String[j args){ // MotorVehicle mvli - new MotorVehicle(); // Cannot instantiate abstract class System.out.println(mv1); System.out.println(); MotorVehicle mv2 - new Car(); System.out.println(mv2); // MotorVehicle mv3 - new Car("SampleData1", 125, 2); System.out.println(mv3); System.out.println(); MotorVehicle mv4 - 'new Truck(); System.out.println(mv4); System.out.println(); MotorVehicle mvs - new Truck("SampleData2", 95, 12000); System.out.println(mv5); System.out.println();
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Concept explainers
OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
Question
JAVA programing
![Class Car
extends MotorVehicle
• concrete class
• one field trunkCapacity
• Overloaded constructor:
o Explicitly call super(String, int) passing values into super class
o set value into field from last parameter for trunkCapacity
o System.out.println("Returning from Car constructor");
• No parameters constructor:
o Use a chained constructor call with this)
• Set manufacturer to "UnknownCar", set top speed to 100, trunk capacity to 1
o System.out.println("Returning from default Car constructor");
toString
o @Override
o Use a StringBuilder to append the String returned from the superclasses toString
o Then append the trunkCapacity
o Return the string
Class Truck
• extends MotorVehicle
concrete class
• one field towingCapacity
• Overloaded constructor:
o Explicitly call super(String, int) passing values into super class
o set value into field from last parameter for towingCapacity
o System.out.println("Returning from Truck constructor");
No parameters constructor:
o Use a chained constructor call with this()
• Set manufacturer to "UnknownTruck", set top speed to 95, towing capacity to 11,000
o System.out.println("Returning from default Truck constructor");
• toString
o @Override
o Use a StringBuilder to append the String returned from the superclasses toString
o Then append the towingCapacity
o Return the string
public class TestMotorVehicles {
public static void main(String[] args){
//
MotorVehicle mv1 = new MotorVehicle(); // Cannot instantiate abstract class
System.out.println(mv1);
System.out.println();
MotorVehicle mv2 - new Car();
System.out.println(mv2);
System.out.println();
MotorVehicle mv3 = new Car("SampleData1", 125, 2);
System.out.println(mv3);
System.out.println();
MotorVehicle mv4 = new Truck ();
//
//
System.out.println(mv4);
System.out.println();
MotorVehicle mvs = new Truck("SampleData2", 95, 12000);
System.out.println(mv5);
System.out.println();](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5586b513-2e9d-4423-a25c-eaa096ca9a64%2F4dbefdcd-9154-4c0a-9fac-16ccd473dfdc%2Fpe4oyi_processed.png&w=3840&q=75)
Transcribed Image Text:Class Car
extends MotorVehicle
• concrete class
• one field trunkCapacity
• Overloaded constructor:
o Explicitly call super(String, int) passing values into super class
o set value into field from last parameter for trunkCapacity
o System.out.println("Returning from Car constructor");
• No parameters constructor:
o Use a chained constructor call with this)
• Set manufacturer to "UnknownCar", set top speed to 100, trunk capacity to 1
o System.out.println("Returning from default Car constructor");
toString
o @Override
o Use a StringBuilder to append the String returned from the superclasses toString
o Then append the trunkCapacity
o Return the string
Class Truck
• extends MotorVehicle
concrete class
• one field towingCapacity
• Overloaded constructor:
o Explicitly call super(String, int) passing values into super class
o set value into field from last parameter for towingCapacity
o System.out.println("Returning from Truck constructor");
No parameters constructor:
o Use a chained constructor call with this()
• Set manufacturer to "UnknownTruck", set top speed to 95, towing capacity to 11,000
o System.out.println("Returning from default Truck constructor");
• toString
o @Override
o Use a StringBuilder to append the String returned from the superclasses toString
o Then append the towingCapacity
o Return the string
public class TestMotorVehicles {
public static void main(String[] args){
//
MotorVehicle mv1 = new MotorVehicle(); // Cannot instantiate abstract class
System.out.println(mv1);
System.out.println();
MotorVehicle mv2 - new Car();
System.out.println(mv2);
System.out.println();
MotorVehicle mv3 = new Car("SampleData1", 125, 2);
System.out.println(mv3);
System.out.println();
MotorVehicle mv4 = new Truck ();
//
//
System.out.println(mv4);
System.out.println();
MotorVehicle mvs = new Truck("SampleData2", 95, 12000);
System.out.println(mv5);
System.out.println();
Transcribed Image Text:Steps:
For testing purposes use the TestMotorVehicles class provided.
Use the UML diagrams and the notes below to create a small demonstration program.
MotorVehicle
manufacturer: String
-topSpeed: int
<constructor>>MotorVehicle(manufacturer: String, topSpeed: int)
+ecconstructor>MotorVehicle()
+tostring(): String
Car
Truck
-trunkCapacity: int
-towingCapacity Int
<<constructor>>Car(Imanufacturer: String, topSpeed: int, trunkCapacity: int)
<constructor>>Car()
+tostringl): String
<constructor>>Car((manufacturer. String, topSpeed: int, towingCapacity: intį
<constructor>Cart)
+tostring(i: String
TestMotorVehicles
amaintargs: Serinell), vold
Class MotorVehicle:
• extends Object
• Abstract class
• Overloaded constructor:
o Explicitly call super()
o set values into fields from parameters
o System.out.println("Returning from MotorVehicle constructor");
• No parameters constructor:
o Use a chained constructor call with this)
• Set manufacturer to "UnknownMotorVehicle", set top speed to zero
o System.out.printin("Returning from default MotorVehicle constructor");
toString
o @Override
o Use a StringBuilder to append the String returned from the superclasses toString
o Then append the manufacturer and top speed
o Return the string
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