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Topic: Method overloading


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In the News (Thu 16 Feb 12)

  
  Method overloading - Wikipedia, the free encyclopedia
Method overloading is a feature found in various programming languages such as C++ and Java that allows the creation of several functions with the same name which differ from each other in terms of the type of the input and the type of the output of the function.
Method overloading is usually associated with statically-typed programming languages which enforce type checking in function calls.
Method overloading should not be confused with ad-hoc polymorphism or virtual functions.
en.wikipedia.org /wiki/Method_overloading   (181 words)

  
 WitScale's SCJP (Java Certification) Study Notes - Method Overloading and Overriding.
Overloaded methods may have arguments with different types and order of the arguments may be different.
Overloaded methods are not required to have the same return type or the list of thrown exceptions.
The method in the super class is said to be overridden by the method in the subclass.
www.witscale.com /scjp_studynotes/chapter6.html   (818 words)

  
 SCJP Study Notes - Method Overloading, Overriding, Runtime Type, and Object Orientation -2
When an overloaded method is called, java uses the type and/or number of arguments to decide which version of the overloaded method to actually call.
You should restrict your use of overloaded method names to situations where the methods really are performing the same basic function with different data.
In a class hierarchy, when a method in a subclass has the same name and type signature as a method in its superclass, then the method in the subclass is said to override the method in the superclass.
www.akgupta.com /Java/Notes/section6-2.htm   (683 words)

  
 Overriding My Shadows (Adventures in .NET)
Methods can always be replaced by shadowing, which I'll discuss next, but overriding is the preferred method of altering or replacing a method on a base class because overriding is done with the permission of the base class designer.
Rather than changing the method name in the subclass to avoid the conflict, and thus rewriting all the client code, we may simply choose to ignore the new base class method and continue using the existing method on the subclass.
Also, as we discussed earlier, overriding uses virtual methods so the implementation of the method that is invoked is based on the data type of the underlying object, not the data type of the variable we're using.
msdn.microsoft.com /library/en-us/dnadvnet/html/vbnet12252001.asp   (3895 words)

  
 Classes
Methods and fields may have the same name, since they are used in different contexts and are disambiguated by the different lookup procedures (§6.5).
When a method is invoked (§15.12), the number of actual arguments and the compile-time types of the arguments are used, at compile time, to determine the signature of the method that will be invoked (§15.12.2).
The formal parameters of a constructor are identical in structure and behavior to the formal parameters of a method (§8.4.1).
java.sun.com /docs/books/jls/second_edition/html/classes.doc.html   (12415 words)

  
 Java Advanced Placement Study Guide: Method Overloading
When the overloaded method was invoked twice in succession, passing the two different reference variables as parameters, the output shows that the version that was invoked in each case had a formal argument type that matched the type of the parameter that was passed to the method.
The output indicates that the method selected for execution during each invocation is the method with the formal argument type that matches the type of parameter passed to the method.
Although method overriding is not the topic of this lesson, the author of the class named Subclass could solve this problem by overriding the inherited square() method for a parameter of type int, using the super keyword to gain access to the blocked square() method.
www.developer.com /tech/article.php/987161   (4355 words)

  
 Java Methods   (Site not responding. Last check: 2007-11-06)
The behavior of this program is counterintuitive because selection among overloaded methods is static, while selection among overridden method is chosen at run time, based on the run-time type of the object on which the method is invoked.
Compare this to overloading, where the run-time type of an object has no effect on which overloading is executed; the selection is made at compile time, based entirely on the compile-time types of the parameters.
Under these circumstances, which overloading applies to a given set of actual parameters is fully determined by the run-time types of the parameters and cannot be affected by their compile-time types, so the major source of confusion evaporates.
www.awprofessional.com /articles/article.asp?p=31551&seqNum=4   (1427 words)

  
 ONLamp.com: Object Overloading in PHP 5
Additionally, the method looks at the rest of the method name (minus the first three characters), because this string marks the name of the property to which the "virtual" getter or setter refers.
If the method name indicates a getter or setter, the method must either return the value of the corresponding property or set its value to the first argument of the original method.
Now that you are aware of the possibilities that overloading offers, you have something at your fingertips that allows you to save quite a bit of time and work in the early (and probably also later) stages of your future projects.
www.onlamp.com /pub/a/php/2005/06/16/overloading.html   (1886 words)

  
 PHP: Object property and method call overloading - Manual
In PHP 4, if you are calling your overloaded class A from inside class B, you MUST include and overload class A before including class B. I struggled with this one for some time, before attempting to change the include order of the classes, which then worked great.
If an overloaded class simply must be subclassed, rewrite the parent class to get rid of the overloading.
Overloading means defining several methods with the same name in a single class.
us2.php.net /manual/en/ref.overload.php   (1280 words)

  
 Method Overloading and Polymorphism   (Site not responding. Last check: 2007-11-06)
When you define a method with the same name as one previously defined but with a different signature, you are overloading that method.
Your class will have methods with the same name but each with a different number of arguments or different types of arguments (or both).
The way it is eaten (the method definition executed in each case) may be different, but the end result is the same, ie, the peanut gets eaten.
www.csse.uwa.edu.au /~peterj/javalin/tut2-l4.html   (541 words)

  
 1.9.4 Name and Method Overloading
In a class, Java permits the same method name to be used for different methods as long as their argument lists do not identical the same length and same types.
When the Java compiler encounters a method invocation involving an overloaded method, it determines the types of the method arguments and uses this information to select the ``best'' (most specific) match from among the alternatives.
Since static type information is used to resolve which method is meant, program errors may be difficult to find because the programmer may not infer the correct static type when reading the code.
www.cs.rice.edu /~cork/teachjava/2003/notes/current/node55.html   (413 words)

  
 Method overloading in C# .Net   (Site not responding. Last check: 2007-11-06)
Without method overloading, we would have to create a unique method name for each type of calculation we would have to do.
The methods are all very similar however they are differ by the number of arguments used in the tax calculation.
Method overloading is a powerful concept in C# in that it helps to simplify code reusability and clarity.
www.codersource.net /csharp_method_overloading_ed.html   (1043 words)

  
 Use method overloading in Java   (Site not responding. Last check: 2007-11-06)
Overloading is the ability to have a class that has multiple methods with the same name that are differentiated by the number and type of arguments passed into the method.
Overloading is used in the standard Java classes.
Overloading is a powerful feature, but you should use it only as needed.
builder.com.com /5100-6370-5074021.html   (517 words)

  
 Method Overloading   (Site not responding. Last check: 2007-11-06)
Function Overloading (or "Method Overloading" if within a class) is providing multiple copies of a function, each with a different signature (i.e.
Overriding a base class method in a subclass (derived class) is done by writing a method with an identical signature as that in the base class.
If an instance of the subclass accesses this method, then the subclass's version of the method is used rather than the base class method.
cs-people.bu.edu /metcalf/is703/overriding.html   (430 words)

  
 Method Overloading
Overload 1 requires two integers - exactly the parameters that we are passing in.
Generally, you should consider overloading a method when you for some reason need a couple of methods that take different perameters, but conceptually do the same thing.
Another good example method is a method Sign() in the System.Math base class, which returns the sign of a number, and is overloaded to work out the sign of double, a decimal and other signed types.
www.csharpfriends.com /Articles/getArticle.aspx?articleID=105   (358 words)

  
 perl.com: Overloading
When you call one of these methods, the Java Virtual Machine determines which of the three methods you wanted by looking at the number and type of the arguments.
Therefore the same method can be used to handle all of the three cases from the Java example.
As promised, there's just one method here and it does everything that the three Java methods did and more even, so it's a good example of why we don't need method overloading in Perl.
www.perl.com /pub/a/2003/07/22/overloading.html   (1027 words)

  
 Method Overloading   (Site not responding. Last check: 2007-11-06)
Methods that share the same name must be distinguished by their signature.
A method’s signature is the name of the method in combination with the order, type and number of parameters - it must be unique
The signatures of the woof() methods in the Dog class are differentiated by their parameters
linus.socs.uts.edu.au /~sean/PI.dir/l6.dir/tsld006.htm   (78 words)

  
 [No title]
When a method is called, the selection of which version of method is run is totally dynamic.
An interface does not include the implementation of any methods, it just defines a set of methods that could be implemented.ó/+Ÿ¨interface implementationŸ¨ÌA class can implement an interface, this means that it provides implementations for all the methods in the interface.
Method overloading is resolved at compile time.¡Hp02:0ó$ Ÿ¨Inheritance vs. CompositionŸ¨ÎWhen one object type depends on another, the relationship could be: is-a has-a Sometimes it's hard to define the relationship, but in general you use composition (aggregation) when the relationship is has-a¡PDZ Z€ZD zó%!Ÿ¨ CompositionŸ¨ One class has instance variables that refer to object of another.
www.cs.rpi.edu /~hollingd/java/notes/OOP/OOP.ppt   (5550 words)

  
 Dynamic Method Dispatch and Method Overloading in a Subtype
When we have inheritance and overriding, a process of selecting a method implementation is called "dynamic method dispatch" because it is done at run time, not at compile time.
A method call is dispatched to the nearest implementation, working back up the inheritance hierarchy from the current or specified type.
But putting together overriding and overloading is what complicates the situation in where we ask our selves which method would be executed.
www.revealnet.com /newsletter-v4/0503_C.htm   (808 words)

  
 darron schall: Method Overloading in ActionScript 2
An overloaded method is a method that has one name but multiple argument lists.
You can also change the types and the length to overload a method, but that is not illustrated here (though I've commented where to do such a thing).
Right now the worst case for a single argument being overloaded is N additional comparisons, where N is the number of possible types for an overloaded method.
www.darronschall.com /weblog/archives/000048.cfm   (1218 words)

  
 Method Overloading & Overriding   (Site not responding. Last check: 2007-11-06)
Method overloading and overriding provide precise control in specifying the behaviour of a class
Appropriate method is invoked based on the parameters passed.
- ChildEx overloads (extends functionality) the reset() method it inherits from ParentEx and overrides (defines new behaviour) the toString() method it inherited from ParentEx.
www.cs.adfa.edu.au /~pfe/pptlectures/Classes4/tsld037.htm   (126 words)

  
 [No title]   (Site not responding. Last check: 2007-11-06)
More specifically, it is the ability to redefine methods for derived classes.
For example, given a base class shape, polymorphism enables the programmer to define different circumference methods for any number of derived classes, such as circles, rectangles and triangles.
No matter what shape an object is, applying the circumference method to it will return the correct results.
www.cs.arizona.edu /classes/cs335/fall02/presentations/335-6-Polymorphism.ppt   (529 words)

  
 solidox - Property and Method Overloading in PHP
Using this extension allows for property access and method calling of a class to be overloaded.
One must explicitly tell PHP to overload a class, as it is not done by default.
data, they use a method of the class of the data their working on.
solidox.org /index.php?w=module:article,action:view,id:14   (604 words)

  
 Method Overloading in LiveConnect 3.0
The technique that earlier versions of LiveConnect use to invoke overloaded Java methods from JavaScript is dirt-simple: The first applicable method that is enumerated by the Java VM is chosen.
The Netscape JVM always enumerated methods using the order in which they appeared in their classfile, so rearrangement of methods in the Java source files was often required to invoke the desired method.
The first step in resolving a method invocation is to determine which methods of a class are accessible and applicable.
www.mozilla.org /js/liveconnect/lc3_method_overloading.html   (1742 words)

  
 PHP: Overloading - Manual
These methods will only be triggered when your object or inherited object doesn't contain the member or method you're trying to access.
Consider a utility class that has all static methods on it where one or more of those methods are overloaded.
But when one of the property overloading methods(__set() or __get()) was defined the class behaves like the requested property wasn't defined at all and overloads it.
www.php.net /manual/en/language.oop5.overloading.php   (1923 words)

  
 Overloading
Overloading is when the same method or operator can be used on many different types of data.
You could argue that this should be called identifier overloading rather than method overloading since it's the identifier that refers to more than one method, not the method that refers to more than one identifier.
If there are no arguments to the constructor, or two or three arguments that aren't the right type in the right order, then the compiler generates an error because it doesn't have a method whose signature matches the requested method call.
www.ibiblio.org /javafaq/course/week4/01.html   (340 words)

  
 Web Methods Overloading in .NET
Strictly speaking, method overloading is the ability to define several methods, all with the same name.
The nice thing about overloading is that you can still use exactly the same method name; just provide different argument types.
Here is a word of caution: try to use overloading only when all implementations of the overloaded method do more-or-less the same thing.
www.devsource.com /article2/0,1759,1828651,00.asp   (707 words)

  
 Exercise   (Site not responding. Last check: 2007-11-06)
This kind of training can provide a relatively quick and convenient method for overloading and strengthening muscles without any special equipment and with little chance of injury.
It provides muscular overload at a constant preset speed while the muscle mobilizes its force through the full range of motion.
For example, an isokinetic stationary bicycle set at 90 revolutions per minute means that despite how hard and fast the exerciser works, the isokinetic properties of the bicycle will allow the exerciser to pedal only as fast as 90 revolutions per minute.
www.chclibrary.org /micromed/00047540.html   (1606 words)

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