What's the difference between overloading and overriding?

Question

in Java

Answer 1

Overriding means you implement a method in the subclass that has the same signature as one in the parent class.
e.g
// Parent class
public class PClass{
public void func(){
}
}
// Child class
public class CClass{
public void func(){
// overriden method that has the same signature
}
}

Overloading: you only cahnge the parameters
// Parent class
public class PClass{
public void func(int a){
}
}
// Child class
public class CClass{
public void func(int a, int b){
/* overriden method that has the same signature but different arguments */
}
}

Answer 2

Differences Between Overloading And Overriding

Answer 3

When you overload something you look at the parameters for a method. If there are identical methods written (identicle names for the methods) and these methods have different parameters, then java knows that the method that you are calling is the one which has the same number of different parameters as you specify when you call it. IE: myPrint(int x, double y) and myPrint(String myString). and you call myPrint("asd"); ok, well since there is only one parameter, java knows to call the second one. Overridding is... hm I dont know sorry! Mabey one of your other answers can help you with that...

Answer 4

overloading is when you overload something, like buffer overflow for example when expected value should be 10 characters long and input value is 11 characters long, that would be overloading(crashing), and overriding is when you override something, like overriding a value, for example if string is equal to some value and you set a new value to it, that would mean overriding

Answer 5

Overloading methods in java are when there are two functions with the same name but different parameter types or number of parameters. Inheritance is not implied in overloading.

Overriding methods implies inheritance. The methods should have same name, return type and arguments.

Answer 6

o‧ver‧load  /v. ˌoʊvərˈloʊd; n. ˈoʊvərˌloʊd/ Pronunciation Key - Show Spelled Pronunciation[v. oh-ver-lohd; n. oh-ver-lohd] Pronunciation Key - Show IPA Pronunciation

–verb (used with object) 1. to load to excess; overburden: Don't overload the raft or it will sink.
–noun 2. an excessive load.


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[Origin: 1545–55; over- + load]
Dictionary.com Unabridged (v 1.0.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
American Heritage Dictionary - Cite This Source o·ver·load (vr-ld) Pronunciation Key
tr.v. o·ver·load·ed, o·ver·load·ing, o·ver·loads
To load too heavily.

n. (vr-ld)
An excessive load.

(Download Now or Buy the Book) The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2000 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
WordNet - Cite This Source
overload

n 1: an electrical load that exceeds the available electrical power 2: an excessive burden [syn: overburden] v 1: become overloaded; "The aerator overloaded" 2: fill to excess so that function is impaired; "Fear clogged her mind"; "The story was clogged with too many details" [syn: clog] 3: place too much a load on; "don't overload the car" [syn: surcharge, overcharge]
o‧ver‧ride  /v. ˌoʊvərˈraɪd; n. ˈoʊvərˌraɪd/ Pronunciation Key - Show Spelled Pronunciation[v. oh-ver-rahyd; n. oh-ver-rahyd] Pronunciation Key - Show IPA Pronunciation verb, -rode, -rid‧den, -rid‧ing, noun

–verb (used with object) 1. to prevail or have dominance over; have final authority or say over; overrule: to override one's advisers.
2. to disregard, set aside, or nullify; countermand: to override the board's veto.
3. to take precedence over; preempt or supersede: to override any other considerations.
4. to extend beyond or spread over; overlap.
5. to modify or suspend the ordinary functioning of; alter the normal operation of.
6. to ride over or across.
7. to ride past or beyond.
8. to trample or crush; ride down.
9. to ride (a horse) too much.
10. Fox Hunting. to ride too closely behind (the hounds).
–noun 11. a commission on sales or profits, esp. one paid at the executive or managerial level.
12. budgetary or expense increase; exceeding of an estimate: work stoppage because of cost overrides.
13. an ability or allowance to correct, change, supplement, or suspend the operation of an otherwise automatic mechanism, system, etc.
14. an auxiliary device for such modification, as a special manual control.
15. an act of nullifying, canceling, or setting aside: a Congressional override of the President's veto.
16. Radio and Television Slang. something that is a dominant or major facet of a program or series, esp. something that serves as a unifying theme: an entertainment series with a historical override.


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[Origin: bef. 900; ME overriden to ride over or across, OE oferrīdan. See over-, ride]
Dictionary.com Unabridged (v 1.0.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
American Heritage Dictionary - Cite This Source o·ver·ride (vr-rd) Pronunciation Key
tr.v. o·ver·rode, (-rd) o·ver·rid·den, (-rdn) o·ver·rid·ing, o·ver·rides

To ride across.
To ride beyond.
To trample on.
To ride (a horse) too hard.

To prevail over; conquer: Budgetary concerns overrode all other considerations.
To declare null and void; set aside: overrode the President's veto.
To counteract the normal operation of (an automatic control).
To extend over; overlap.

n. (vr-rd)
A sales commission collected by an executive in addition to the commission received by a subordinate salesperson.
See royalty.
A mechanism or system used to counteract an automatic control.
The act or an instance of nullifying.


(Download Now or Buy the Book) The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2000 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Merriam-Webster's Dictionary of Law - Cite This Source
Main Entry: over·ride
Pronunciation: "O-v&r-'rId
Function: transitive verb
Inflected Forms: -rode /-'rOd/; -rid·den /-'rid-&noun/; -rid·ing
1 : to prevail or take precedence over
2 : to set aside by virtue of superior authority ; especially : ANNUL 2

Merriam-Webster's Dictionary of Law, © 1996 Merriam-Webster, Inc.
Merriam-Webster's Dictionary of Law - Cite This Source
Main Entry: over·ride
Pronunciation: 'O-v&r-"rId
Function: noun
1 : a commission paid to managerial personnel on sales made by subordinates called also override commission
2 : ROYALTY
3 : an act or instance of overriding

Merriam-Webster's Dictionary of Law, © 1996 Merriam-Webster, Inc.
WordNet - Cite This Source
override

n 1: a manually operated device to correct the operation of an automatic device 2: the act of nullifying; making null and void; counteracting or overriding the effect or force of something [syn: nullification] v 1: rule against; "The Republicans were overruled when the House voted on the bill" [syn: overrule, overturn, overthrow, reverse] 2: prevail over; "health considerations override financial concerns" 3: counteract the normal operation of (an automatic gear shift in a vehicle) 4: ride (a horse) too hard