You are watching: Can we overload the main method?
The short answer to, deserve to we overload the main technique in Java is Yes, you can overloading, nothing stop from overloading, yet JVM will always call the original main method, it will never call your overloaded main method.
You will discover this in little much more detail later, now coming come the following question, have the right to you override the main an approach in Java? the prize is No due to the fact that themain is a static method and thestatic an approach cannot be overridden in Java.
In order come answer this question expertise of overloading and overriding is necessary. Friend should recognize that overloading takes location at translate into time and overriding takes place at runtime. Girlfriend should additionally be acquainted with the rules of an approach overloading and overriding in Java.Though main() is a special an approach because it"s the entry suggest of your Java application, it complies with thesame dominance of technique overriding and also overloading as any kind of other method. In this article, you will learn exactly how to overload the main method to check out whether JVM call the original, standard main with string debate or not.
Overloading the main method in JavaHere is just how you deserve to overload the main an approach in Java. This is just one way, girlfriend can create as plenty of versions the the key as friend want, yet you need to make certain that the method signature of each main is different.
You can change the technique signature by transforming the type of argument, the number of arguments, or the order of arguments.
The best practice come overload a method or constructor is by changing the number of arguments, or species of arguments. Overloading methods just by an altering the bespeak of debates may create confusion and also increase the chance of phone call the dorn method. It"s precious remembering that,
Code instance of Overloading Main technique in Java
/** * Java program to display that you have the right to overload main an approach in Java * but you can not override main method. * *
author Javin Paul */public course Helloworld /** * Standard key method, JVM will certainly only call this method * even if you listed multiple overloaded version. * */ public static void main(String<> args) System.out.println("Inside main(String<> args) method ...."); /** * one overloaded main an approach which accepts Integer<> rather of * String<> together argument. *
param args */ public revolution void main(Integer<> args) System.out.println("Inside main(Integer<> args) an approach ...."); /** * an additional overloaded main method which accepts Double<> rather of * String<> as argument. *
param args */ public static void main(Double<> args) System.out.println("Inside main(Double<> args) method ...."); OutputInside main(String<> args) technique ....In this example, you have the right to see that we have actually two main methods, one accepts String range as an argument and the various other accept Integer selection as one argument, but you have the right to see that when you run our regime from the command line, only the main an approach with string variety as an argument is called.There to be no error, no ambiguity, JVM will constantly call this main method, no matter how plenty of overloaded main methods friend will placed on this class. Then questions come just how do you call your overloaded main? Well, you can call it simply like any type of other method.Simply phone call main(new int<>1, 2, 3) from the initial main technique will invoke your overloaded key with integer variety as one argument. Due to the fact that there is no compilation error, that proves that you can overload the main an approach in Java.Regarding Overriding us have already proven the thestatic technique cannot be overridden, they have the right to only it is in hidden. Watch that short article to discover this concept by following an example. In short, the main method can it is in overloaded however cannot it is in overridden in Java.
That"s all about overloading and overriding the main technique in Java. Now you know that it"s feasible to overload key in Java however it"s not possible to override it, simply due to the fact that it"s a static method. Execution of Java program has no affect on overloading main due to the fact that JVM always calls the initial main method and if that doesn"t discovered in class then the throws java.lang.NoSuchMethodError: main exemption in subject "main" error at runtime.
If you like this tutorial and looking for some more Java beginners tutorials, ns suggest exploring the complying with tutorials native this blog :Thanks for analysis this post so far. If you uncover this Java interview question advantageous then please share it v your friends and colleagues. If girlfriend have any questions or feedback then you re welcome drop a note.
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