Mega Code Archive
Illustrates how to declare classes, object references, and create objects
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/*
Mastering Visual C# .NET
by Jason Price, Mike Gunderloy
Publisher: Sybex;
ISBN: 0782129110
*/
/*
Example5_1.cs illustrates how to declare
classes, object references, and create objects
*/
// declare the Car class
class Car
{
// declare the fields
public string make;
public string model;
public string color;
public int yearBuilt;
// define the methods
public void Start()
{
System.Console.WriteLine(model + " started");
}
public void Stop()
{
System.Console.WriteLine(model + " stopped");
}
}
public class Example5_1
{
public static void Main()
{
// declare a Car object reference named myCar
Car myCar;
// create a Car object, and assign its address to myCar
System.Console.WriteLine("Creating a Car object and assigning " +
"its memory location to myCar");
myCar = new Car();
// assign values to the Car object's fields using myCar
myCar.make = "Toyota";
myCar.model = "MR2";
myCar.color = "black";
myCar.yearBuilt = 1995;
// display the field values using myCar
System.Console.WriteLine("myCar details:");
System.Console.WriteLine("myCar.make = " + myCar.make);
System.Console.WriteLine("myCar.model = " + myCar.model);
System.Console.WriteLine("myCar.color = " + myCar.color);
System.Console.WriteLine("myCar.yearBuilt = " + myCar.yearBuilt);
// call the methods using myCar
myCar.Start();
myCar.Stop();
// declare another Car object reference and
// create another Car object
System.Console.WriteLine("Creating another Car object and " +
"assigning its memory location to redPorsche");
Car redPorsche = new Car();
redPorsche.make = "Porsche";
redPorsche.model = "Boxster";
redPorsche.color = "red";
redPorsche.yearBuilt = 2000;
System.Console.WriteLine("redPorsche is a " + redPorsche.model);
// change the object referenced by the myCar object reference
// to the object referenced by redPorshe
System.Console.WriteLine("Assigning redPorsche to myCar");
myCar = redPorsche;
System.Console.WriteLine("myCar details:");
System.Console.WriteLine("myCar.make = " + myCar.make);
System.Console.WriteLine("myCar.model = " + myCar.model);
System.Console.WriteLine("myCar.color = " + myCar.color);
System.Console.WriteLine("myCar.yearBuilt = " + myCar.yearBuilt);
// assign null to myCar (myCar will no longer reference an object)
myCar = null;
}
}
]]>