Overloading is very useful in Java. For instance, methods can be overload as long as the type or number of parameters (arguments) differ for each version of the method. This comes in handy when, for instance, you need to perform a complex mathematical operation, but sometimes need to do it with two numbers and sometimes three, etc.
The need to overload a constructor is apparent in any OO language.
Take for example the following situation.
You have written a class to represent a circle. When you declare a new circle in your code, you may or may not know how big it is.
In this case you would want two constructors.
Circle myCircle = new Circle();
Would be used if you wanted a new circle and you were going to decide at a later time how big it is.
Circle myCircle = new Circle(6.7);
Would be used if you wanted your circle to be of size 6.7 (whatever that means ;)
Another (slightly better) example:
You are writing a class to represent a person. A person always has a first and last name, but may or may not have a middle name. Because of this we would create two constructors.
(forgive my java, it's been a long time since i used it)
Person( string first, string last)
and
Person(string first, string middle, string last)
If you want to change the behavior of a method that exists in a super class, overloading is the only way you can alter the behavior.
Java does not support opperator overloading, so the answer to your question is: none.
== == === === === === === === Some Body told me that operator overloading is not there because it violates the transparency of java.since there is no hiding of information in java it does support op overloading === === === === === === Pranab Kumar Rana Software Engineer..... === === === ===
method overloading is the primary way polymorphism is implemented in JavaOverloading methodsoverloaded methods: appear in the same class or a subclasshave the same name but,have different parameter lists, and,can have different return types
JAVA is an Object Based Programming Language. it doesn't provide multiple inheritance and operator overloading. while Object Oriented Lanuages provides both.
Any function or method in Java that is coded by the programmer is called a user defined method in Java. The JAVA API (Application Programming Interface) has a set of predefined classes & methods that are for our usage. Whatever methods we create apart from these are termed as user defined methods. In java we not use the term functions. We call them "Methods"
Java does not support opperator overloading, so the answer to your question is: none.
Pressumably, the designers of Java thought this would lead to confusing code.
how many constructer can be defined in class in overloading of java programming
== == === === === === === === Some Body told me that operator overloading is not there because it violates the transparency of java.since there is no hiding of information in java it does support op overloading === === === === === === Pranab Kumar Rana Software Engineer..... === === === ===
Maybe because Sun said so. We have to bear with so many other idiosyncrasies too. But I guess that comes with every language. There were two major reasons why operator overloading wasn't allowed in Java: "cleanliness" and compiler complexity. The main reason was the first, a personal preference choice made by Java's creator, James Gosling. Operator overloading, while useful, can be exceedingly confusing, much more so than method overloading. Given the human tendency to assign specific meanings to single symbols, it is hard to get programmers to wrap their heads around multiple meanings for operators. What this means is that there is a marked increase in programming errors when a language supports operator overloading. Since practically the same benefit can be obtained via methods, the Java designers decided that the increased programmer mistake rate was not worth supporting operator overloading. From a Java compiler (e.g. javac) design standpoint, supporting operator overloading is considerably more difficult than method overloading, requiring a more complex compiler.
Java does not support user defined operator overloading.The operator '+' is overloaded in Java and can be used for adding both numbers and Strings.
Java does not support object overriding. It does support operator overloading by means of the "+" symbol which is used for both numeric addition as well as string concatenation.
Yes. It is called Method Overloading in Java
this in java is a keyword that refers to the current object of the class. It is also used in constructor overloading when you want to invoke one constructor from another within the same class.
method overloading is the primary way polymorphism is implemented in JavaOverloading methodsoverloaded methods: appear in the same class or a subclasshave the same name but,have different parameter lists, and,can have different return types
Overloading is the means by which we can provide two or more different definitions of the same method in the same namespace. Overriding is the means by which a derived class may redefine the meaning of a base class method.
JAVA is an Object Based Programming Language. it doesn't provide multiple inheritance and operator overloading. while Object Oriented Lanuages provides both.