This is very precise explanation. So, if main() is not public in Java, the JVM wont call it. public class Test { public static void main (String . Why the main method is void in Java 2. Why can't I define a static method in a Java interface? Connect and share knowledge within a single location that is structured and easy to search. http://docs.oracle.com/javase/specs/jls/se7/html/jls-12.html#jls-12.1.4. public static void main(String arg[ ] ) in java is it fixed? Since the main method in Java is not supposed to return any value, its made void which simply means main is not returning anything. The syntax of the main () method is as follows: public static void main (String [] args) { } You can write the main method in your program without the static modifier, the program gets compiled without compilation errors. We use cookies to ensure that we give you the best experience on our website. the main method is a standard method and has a pre-specified signature if you change the signature of the main method JVM will not be able to locate the main method will throw Exception at runtime as shown in the above example. If the main() is allowed to be non-static, then while calling the main() method JVM has to instantiate its class. Here we'll talk about the main method and the necessity to mark main method as static in Java. Do NOT follow this link or you will be banned from the site. Making statements based on opinion; back them up with references or personal experience. So, a fix was made in subsequent version to enforce rule stated by JLS. In contrast, the main method of Java MUST be public. public : "public" is an access specifier which can be used outside the class. We know that anyone can access/invoke a method having public access specifier. This website uses cookies. Without the main () method, JVM will not execute the program. But overall, the main areas for the need for support was indicated, included preparation of effective business plans, sales and marketing techniques and other business networking issues. Why don't Java's +=, -=, *=, /= compound assignment operators require casting? I tried searching JLS 1.3 for a reference, but could not get a link. Then we declare that method as static. Why is main method public and static in java? Java main method doesnt return anything, thats why its return type is void. How to round a number to n decimal places in Java. Feel free to comment, ask questions if you have any doubt. More complex programs usually have a class that contains only the main method. We use cookies to ensure that we give you the best experience on our website. Why main () is declared public and static in Java? void : void return type is used when a method does'nt return any value . We know that the main method which serves as an entry point for the application. The Main method is the entry point of a C# application. Is the EU Border Guard Agency able to tell Russian passports issued in Ukraine or Georgia from the legitimate ones? The main method is void in Java because it doesn't return anything to the caller which is JVM. So the 'main' is declared public as well as static so that it can be accessed outside class & without even an Object is created. But, at the time of execution JVM does not consider this new method (without static) as the entry point of the program. Having an access modifier as public means method can be accessed from classes in the same package and from other packages too. Still . 1. For example: public class Main { public static void main (String args []) { // your . In this case, main must be declared as public , since it must be called by code outside of its class when the program is started. Hello @Unknown, what is your doubt? The initialization software that starts your program must be able to see main so that it can call it. On Main () and Command Line Arguments (C# Programming Guide) , there is a statement: It (the Main method) is declared inside a class or struct. Would it be possible, given current technology, ten years, and an infinite amount of money, to construct a 7,000 foot (2200 meter) aircraft carrier? Here is small example of little java class with main method : [code]public class A //The class name is in you control { public A(int param1, int param2) //. However, some programmers point out that putting the main() method into its own class can help make the Java components you are creating reusable. So the 'main' is declared public as well as static so that it can be accessed outside class & without even an Object is created. It must But, can anyone can explain why it is declared public always? Learn Java and Programming through articles, code examples, and tutorials for developers of all levels. JVM calls the main() method without creating object by declaring keyword static. We know that anyone can access/invoke a method having public access specifier. The role of adding static before any entity is to make that entity a class entity. According to an answer on stackoverflow, It is declared as static, "The method is static because otherwise there would be ambiguity: which constructor should be called?". If you come from C and C++ programming language then you know what is the main method as both of these programs also use main() as an entry point for program execution but the main method in. This is one of the most important fundamentals of the Java programming language and every Java programmer should be familiar with it. The main method is static in Java, so the JVM can directly invoke it without instantiating the classs object. Your badges and posts will all move over, and all . Why main method is public and static in Java? public static void main(String args[]){ Here are 25 ways police officers serve their communities: Responding to calls for police service. Now, the point is why JLS writer enforced this rule at first place I really have no idea. Java visibility concept does not apply to JVM - As JVM can access any method irrespective to its access level defined. static: To call a method we require an object. JVM calls the main() method without creating object by declaring keyword static. Does the collective noun "parliament of owls" originate in "parliament of fowls"? While JVM tries to execute the Java programs it doesn't know how to create instances of the main class as there is no standard constructor is defined for the main class. The main method then calls all the other methods required to run your application. Can we run main method without static? 2. }, "I am main class which contains Share Improve this answer If you have a specific doubt we may be able to explain you better. So just think about it in real world scenarios. Also, the class must not be abstract; otherwise, the JVM could not instantiate it. Why this rule not applicable for main() method (public static void main(String a )). I wish i read that before the interview i gave yesterday. The Main method can be declared with or without a string [] parameter . Find centralized, trusted content and collaborate around the technologies you use most. (Libraries and services do not require a Main method as an entry point.) private, protected, and public. We know that anyone can access/invoke a method having public access specifier. It will be difficult for various IDEs (integrated development environment) to identify the launchable classes in the project. Answer: Java main method is static, so that compiler can call it without creation of object or before creation of an object of the class. String. Consider a case when static is not mandatory for main (). . Java program's main method has to be declared static because keyword static allows main to be called without creating an object of the class in which the main method is defined. Why is the main method in Java qualified as public static and void? JVM calls the main() method without creating object by declaring keyword static. So, if main() is not public in Java, the JVM wont call it. When the Java interpreter executes an application (by being invoked upon the application's controlling class), it starts by calling the class's main method. A small bolt/nut came off my mtn bike while washing it, can someone help me identify it? The main method is required to be declared at the start of the code. This line declares a class named Main , which is public , that means that any other class can access it. JVM calls the main() method without creating object by declaring keyword static. main() method does'nt return any value, so main() is declared as void. if it's not public JVM classes might not able to access it. You can write the main method in your program without the static modifier, the program gets compiled without compilation errors. Be the first to rate this post. Examples of frauds discovered because someone tried to mimic a random sequence. even a private main was being accepted by JRE. However, it is briefly written in the answer. why main method can't be of default scope? You are trying to use a double for the size. Given below are the examples mentioned: Now we see a coding example in which the public access modifier is used, and then it is used to add two numbers. The syntax of the main () method is: public: It is an access specifier. So there is no point in returning anything, there is nothing that can be done for the returned object by JVM. Because the main method should be accessed by JVM without any restrictions from any where. please answer as soon as possible. That's all about why the main method is declared public and static in Java. If we omit static keyword before main Java program will successfully compile but it won't execute. Why main method is public? Public - Access modifier is public so that main method is visible to every other class, same package or other. The main method in Java is public so that it's visible to every other class, even which are not part of its package. Should I give a brutally honest feedback on course evaluations? If I remember till JDK 1.3 it was not mandatory from developers perspective. Learn more about Teams Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Look at the below java program example, main () method is declared public static void in a class called Test. The main () method is public, static, and void in java because: public: "public" is an access specifier which can be used outside the class. To learn more, see our tips on writing great answers. Java main method doesn't return anything, that's why it's return type is void. Before the main method is called, no objects are instantiated. The most common entry point of a C# program is static void Main () or static void Main (String []args). C# applications have an entry point called Main Method. The main () method is the first method that encounters first during execution. What is static in public static void main in Java? static: You can make a method static by using the keyword static. Public and Static Methods. 3. Coming to main method signature it is easy to see that main method is-. We cannot modify the syntax of the main () method. main: It is the name of Java main method. The main method must be declared public, static and void in Java otherwise, JVM will not able to run Java program. Any method or variable which is declared public in Java can be accessed from outside of that class. The main method is public, static, and void and accepts a String[] as an argument and from Java 5 onwards it can also accept. But I found that it was reported as a bug by developers across world: Please refer: http://bugs.java.com/bugdatabase/view_bug.do?bug_id=4155575. The main method is static in Java so that it can be called without creating any instance. Why does eclipse require an actual method called 'main'? In Java, JVM (Java Virtual Machine) will always look for a specific method signature to start running an application, and that would be the public static void main (String args []). It must be static and it should not be public. Here are few reasons which make sense to me to think of why main is public, static, and void in java. The main () method represents the entry point of Java programs, and knowing how to use it correctly is very important. Thank you @Emtiaz, glad that you find these questions and explanations useful. Why is it so much harder to run on a treadmill when not holding the handlebars? It is the first method which gets invoked whenever an application started and it is present in every C# executable file. Having the static keyword means the method can be called without creating any objects first. This post will discuss why the main method is declared as public and static in Java. How did muzzle-loaded rifled artillery solve the problems of the hand-held rifle? if its not public JVM classes might not able to access it. In Java programs, the point from where the program starts its execution or simply the entry point of Java programs is the main () method. Its not a keyword. The JVM executes the main method using native API and java visibility concept does not apply here. The main method in Java is public so that it's visible to every other class, even which are not part of its package. As the default access specifier for any method in a class is "private", the above declaration would make the entry point function "Main" as a private method. . Main must be static. Then we declare that method as static. Why is main method public in Java? Main method not found in class Student, please define the main method as: public static void main(String[] args)or a JavaFX application class must extend javafx.application.Application. rev2022.12.9.43105. Enforcing the law and preventing criminal activities. So, it is an entry point of a program. public class Main { In Java, every line of code that can actually run needs to be inside a class. Java program's main method has to be declared static because keyword static allows main to be called without creating an object of the class in which the main method is defined. The public static void main (String ar []) method is the entry point of the execution in Java. When the code is executed, a JVM will be created and that will act as a container for the code we are trying to execute. 'Must Override a Superclass Method' Errors after importing a project into Eclipse. Is it appropriate to ignore emails from a student asking obvious questions? The main () method should be static because it is convenient for JDK (java development kit). Why Java main method is marked public. Where does the idea of selling dragon parts come from? What does it mean to invoke static in Java? 1. @drorb what if we do not make it public? I believe, the rational behind enforcing main as public is more to do with the language specification rather than whether something could be achieved or not. If method is private, JVM wont be able to call it. Main can either have a void or int return type. Asking for help, clarification, or responding to other answers. Media publics carry news, features, and editorial opinions. { In this article. contains the main method"); 1 Why main method is public and static in Java? Since the main method is public in Java, JVM can easily access and execute it. E.g. So, if main () is not public in Java, the JVM won't call it. Why is subtracting these two times (in 1927) giving a strange result? Iran's attorney general said the country had disbanded its so-called morality police and is considering altering the requirement that women cover their heads in public. Teams. A public is any group that has an actual or potential interest in or impact on an organization's ability to achieve its objectives. In Java static is a keyword and it tells the compiler that particular entity belongs to a class and should be loaded once the JVM starts. Directing traffic. Popular Search Warning Apt Does Not Have A Stable Cli Interface Use With Caution In Scripts Water Jug Problem Python Was Preloaded Using Link Preload But Not Used Within A Few Seconds From The Windows Load Event Please Make Sure It Has An Appropriate As Value And It Is Preloaded Intentionally Worst Fit Memory Allocation Program In C Write A Function Class Solution Public . By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. There are two classes. Why Java main method is public static and also has one argument? The class that contains the main method can have any name, although typically you can just call the class Main. Java programs main method has to be declared static because keyword static allows main to be called without creating an object of the class in which the main method is defined. Why Main Method Is Public And Static In Java? The main method in the Java language is similar to the main function in C and C++. When the main () method is declared public it means it can be used outside the class. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Did neanderthals need vitamin C from the diet? Static is a keyword. In any Java program, the main () method is the starting point from where compiler starts program execution. Then we declare that method as static. Maintaining public order. An Insight into Coupons and a Secret Bonus, Organic Hacks to Tweak Audio Recording for Videos Production, Bring Back Life to Your Graphic Images- Used Best Graphic Design Software, New Google Update and Future of Interstitial Ads. What ispublic classin the Java language? So, the compiler needs to call the main () method. Sudo update-grub does not work (single boot Ubuntu 22.04). In Java a function or variable in class in unaccessible untill an Object is created from the class, but the 'main' function is supposed to run at startup (without Object initiation) by JVM. please answer as soon as possible. There can only be one entry point in a C# program. There are ways to call a private method as well (eg by using Reflection), but that is not a standard way to do things. The public keyword is an access specifier, which allows the programmer to control the visibility of class members. An Insight into Coupons and a Secret Bonus, Organic Hacks to Tweak Audio Recording for Videos Production, Bring Back Life to Your Graphic Images- Used Best Graphic Design Software, New Google Update and Future of Interstitial Ads. A method is package-private if it has no access-modifier specified. 2. http://docs.oracle.com/javase/specs/jls/se7/html/jls-12.html#jls-12.1.4, http://bugs.java.com/bugdatabase/view_bug.do?bug_id=4155575. This is a very famous core Java interview question and appeared on many fresher and experience level interviews. No votes so far! Hello @Unknown, can you post your code, it may be possible that your main method has wrong syntax and that's why Java compiler is complaining. The Java compiler or JVM looks for the main method when it starts executing a Java program. Conducting patrols. The method main must be declared public, static, and void. As Jvm starts execution from main method in java. Coming soon, the Groundbreakers Developer Community will be migrating to Oracle Forums for a refreshed experience. Why is the Java main method static keyword? If we omit static keyword before main Java program will successfully compile but it won't execute. Can you please let me know, I'll try to make it clear. 5 What ispublic classin the Java language? 1. If you continue to use this site we will assume that you are happy with it. Thats all about why the main method is declared public and static in Java. Sed based on 2 words, then replace whole line with variable. Q&A for work. Static is a keyword. Java program's main method has to be declared static because keyword static allows main to be called without creating an object of the class in which the main method is defined. In fact till JDK 1.3 developer could actually write private main. We are sorry that this post was not useful for you! What does "Could not find or load main class" mean? This has been done to keep things simple because once the main method is finished executing, java program terminates. And static so that It can be accessed without creating the instance of the class in which Main method has been defined. So there is no point in returning anything, there is nothing that can be done for the returned object by JVM. Financial publics influence the company's ability to obtain funds. The main method is static in Java so that it can be called without creating any instance. There is more information on the initialization and execution of Java programs available in the Java Language Specification. void : void return type is used when a method does'nt return any value. If you continue to use this site we will assume that you are happy with it. When main method is declared public it means it can be used outside class. Why static? Got other things but can you explain the reason why was the need to make the main method parametric with a single dimension String array. The main method is static in Java so that it can be called without creating any instance. Main has been declared as Public as it can be accessed globally. The main method in java doesn't return anything and has return type void while the main method is C and ++ return int. The main () is the starting point for JVM to start execution of a Java program. Richard Frankel (Massachusetts Institute of Psychoanalysis [MIP]) and Victor J. Krebs (Pontificia Universidad Catlica del Per [PUCP]) and VJK Curaduria Filosofica) Human virtuality and digital life: Philosophical and psychoanalytic investigations This book is a psychoanalytic and philosophical exploration of how the digital is transforming our perception of the world and our understanding . So, the compiler needs to call the main() method. How to Market Your Business with Webinars? why main() method is declared as public & static ????? Received a 'behavior reminder' from manager. We should call the main () method without creating an object. Though every java programmer uses the main method not everyone is familiar with the reason why the main is static or why the main is public in Java. Does balls to the wall mean full speed ahead or full speed ahead and nosedive? The main method can contain code to execute or call other methods, and it can be placed in any class that's part of a program. Is there a verb meaning depthify (getting more depth)? When the application is started, the Main method is the first method that is invoked.. is not explicitly declared as "public" . I know we can use it as a CLA and save space of an extra variable, but why it was so necessary to put it there? @OliCharlesworth What is the reason by the way? By making any variable, methods or class as public ( by prefixing it ), you make that thing available/accessible to others programs/softwares , outside the Java source code in which it lies/belongs. Refer: Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. It must specify a formal parameter (8.4.1) whose declared type is array of String. We should use a public keyword before the main () method so that JVM can identify the execution point of the program. It is the identifier that the JVM looks for as the starting point of the java program. Not sure if it was just me or something she sent to the whole team. Why Java main method is void If it's not public, then it won't be found; you'll get. If the main method is non-static, then JVM needs to create an instance of the class, and there would be ambiguity if the constructor of that class takes an argument which constructor should be called by JVM and what parameters should be passed? Sometimes it may be required to call a method without the help of object. The enclosing class or struct is not required to be static. 1 Answer Sorted by: 45 public - The main method is called by the JVM to run the method which is outside the scope of the project therefore the access specifier has to be public to permit a call from anywhere outside the application. 2. the main method". Sometimes it may be required to call a method without the help of object. Why main method is void in Java? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Hello @Anonymous, that's sad, how can I help you? Thanks for contributing an answer to Stack Overflow! Java main () method is always static, so that compiler can call it without the creation of an object or before the creation of an object of the class. Why is char[] preferred over String for passwords? We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. Why main method is public and static in Java? Other barriers they encountered were competition, bureaucratic procedures, recognition of qualifications, individual expectations, communications and . Java main() method is always static, so that compiler can call it without the creation of an object or before the creation of an object of the class. Summary: 1. We can identify seven types ofpublics. Though ever java programmer uses main method not every one is familiar with reason why main is static or why main is public in Java. We can agree upon a default constructor, but thats extra overhead. Read our. The only thing I can think of is that to keep it obvious and non-confusing for developers. Name of a play about the morality of prostitution (kind of). Though, it was not inline with JLS 1.3. One is the main () in which we create an object of Addition (), and then we call the other class through two numbers. Because that is what is known as the "entry point" and if it is private, your program will not be able to run. Mediating disputes. static: To call a method we require object. 3 Why main () is declared public and static in Java? This question is answered in detail in the video. The I-cut-you-choose concept was popularized by the board game Berrymandering. void indicates that the main () method is declared does not return a value. Therefore, it is the convention to making the entry method main . If we make the main method non-static, JVM will have to create its object first and then call main() method which will lead to the extra memory allocation. By using this site, you agree to the use of cookies, our policies, copyright terms and other conditions. i.e. Why is the main method always public and static? Enter your email address to subscribe to new posts. Why main() method is public static void main(String[] args) in Java? If it is not public JVM classes will not be able to access it. The Latest Innovations That Are Driving The Vehicle Industry Forward. static : To call a method we require object. To make Java a little less verbose than it already is, the main method is static in Java. The main method is public in Java because it has to be invoked by the JVM. February 8, 2022 JBT 76 Comments. Main method is always static because non-static members or methods should not be called with the class name directly i.e. void: In Java, every method has the return type. This method has been applied to nominal redistricting problems but it generally has less public interest than other types of redistricting reforms. The application may be Console Application or Windows Application. See my answer below for details. Rate this post When main method is declared public it means it can be used outside class. if it's not public JVM classes might not able to access it. If such a method is not found, a run time error is generated. So, if main () is not public in Java, the JVM won't call it. It means that adding static before methods and variables make them class methods and class variables respectively, instead of instance methods and instance variables. specify a formal parameter (8.4.1) whose declared type is array of The main method is public in Java because it has to be invoked by the JVM. Problems with this method arise when minor parties are shut-out of the process which will reinforce the two-party . In both C and Java, memory for arrays is allocated before . We are forced to write main method as public. Thats all about why the main method is declared public and static in Java. Which is an example of public access in Java? Why is processing a sorted array faster than processing an unsorted array? main method in Java is public so that its visible to every other class, even which are not part of its package. In any Java program, the main () method is the starting point from where compiler starts program execution. Main is declared inside a class or struct. For example, the design below creates a separate class for the main() method, thus allowing the class ServerFoo to be called by other programs or methods: Elements of the Main Method. Why the main method is public in Java Java specifies several access modifiers e.g. Main () isdeclared as static as it is . Yes the standards say so that main method should be public in Java. Protecting victims. We know that JVM cant instantiate a Java class without calling a constructor method. So that is reason main method is public, it can be accessible everywhere and to every object which may desire to use it for launching the application. Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. The Latest Innovations That Are Driving The Vehicle Industry Forward. if it's not public JVM classes might not able to access it. Are there breakers which can be triggered by an external signal and have to be reset by hand? Following points explain what is static in the main () method: main () method: The main () method, in Java, is the entry point for the JVM (Java Virtual Machine) into the java program. you want to enter your room, but you should enter your home main door first (given room is inside the houseand no other means to enter the house). Can a class contain the main method in Java? But it's not only for Java. In this case, main must be declared as public , since it must be called by code outside of its class when the . What are the expressed powers of the president quizlet? Because the JLS, Section 12.1.4, says so: The method main must be declared public, static, and void. How to Market Your Business with Webinars? The first word in the statement, public, means that any object can use the main method.The first word could also be static, but public static is the standard way. Which aspect of main() method is not clear? Public - main method is called by JVM to run the method which is outside the scope of project therefore the access specifier has to be public to permit call from anywhere outside the application. One also understands the structure of . why main() method is declared as public & static ????? Static methods are the method which invokes without creating the objects, so we do not need any object to call the main () method. Ready to optimize your JavaScript with Rust? The main method is public in Java because it has to be invoked by the JVM. Then we declare that method as static. This has been done to keep things simple because once the main method is finished executing, java program terminates. Why main () is declared public and static in java public - The main method is called by the JVM to run the method which is outside the scope of the project therefore the access specifier has to be public to permit a call from anywhere outside the application. JVM launches the java program by invoking the main () method. 4 What does it mean to invoke static in Java? (In the example above it receives the default access of private.) The main method is public in Java because it has to be invoked by the JVM. This method will be executed when the application starts. However even for C#, main must be public. Java main () method is always static, so that compiler can call it without the creation of an object or before the creation of an object of the class. In Java a function or variable in class in unaccessible untill an Object is created from the class, but the 'main' function is supposed to run at startup(without Object initiation) by JVM. Why main () is declared public and static in Java? Why is Singapore considered to be a dictatorial regime and a multi-party democracy at the same time? I think you can find more info here: Why main method is public. The main method in Java is public so that it's visible to every other class, even which are not part of its package. - On Secret Hunt Java program's main method has to be declared static because keyword static allows main to be called without creating an object of the class in which the main method is defined. The main method is public in Java because it has to be invoked by the JVM. I have a question that why main method is marked as public? My question is , if the "Main" method is private how is the runtime going to invoke this static function ?? What is the difference between public, protected, package-private and private in Java? The main method is a method which will be called when the program starts. Why is main method public in Java? When we run a .class file JVM searches for the main method and executes the contents of it line by line. Therefore, either of the following declarations is acceptable: Java uses JNI launch java application will never have any issue in calling a private main but this is more like jail-brake (like another jail-brake, where reflection API let you access private method) and definitely not in spirit of java specification. :(. That's all about why the main method is declared public and static in Java. The main method is static so that it can be called without being created. Answer (1 of 6): Let discuss access modifiers private and public in context of any method not just main() method. While JVM tries to execute the Java programs it doesn't know how to create instances of the main class as there is no standard constructor is defined for the main class. The only thing which we can change is the name of the String array argument. Sometimes it may be required to call a method without the help of object. The method contains the code that is used to run the program. Main method in Java is public so that JVM can easily access it, as JVM needs to load the class and call the main method of the class. JVM launches the java program by invoking the main () method. When you declare a method public then it is accessible outside the class (By any other class) 2. when you declare a method private it means that method is visible/accessible only. package Study; import java.util.Scanner; public class Methods { public static void main (String [] args) { Scanner scan = new Scanner (System.in); double x=scan.nextDouble (); double arr []= new double [x]; } } Array sizes have to be integers. Why does the distance from light to subject affect exposure (inverse square law) while from subject to lens does not? So, if main() is not public in Java, the JVM wont call it. Investigating crimes. 6 Can a class contain the main method in Java? Main door is the only publicly available access point. Understanding static in public static void main in Java. Hence, it is one of the most important methods of Java and having a proper understanding of it is very important. The JVM (Java Virtual Machine) starts its execution by invoking the main method of the specified class, and main() will subsequently invoke all the other methods required by the program. The Main method is the entry point of an .exe program; it is where the program control starts and ends. these can be called after creating the object whereas main method can be called directly using the class name. Connect and share knowledge within a single location that is structured and easy to search. Fastest way to determine if an integer's square root is an integer. Hi Javin, just wanted to thank you for responding to questions from 2016 to 2020 and, I hope, even till now.Good explanation for myself in my opinion.For those who still are not clear on the main method part:Maybe I am oversimplifying things in my head, however the way I see it everything needs to start somewhere and it just so happens for Java that is defined to be at main with the argument specifically being String[]. Declaring this method as public allows the JVM to start the code execution. public is a key word in Java. Answer (1 of 60): As you already must have figured out by now is that the 'main' method you are talking about is entry point of your code. System.out.println("I am main class which
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