![]() ![]() “ String args“:- Java “main” method accepts an argument of type String. JVM searches for the method with name “main”. “ main“:- It is method name which is fixed. So if you make main method to return something, you can not use returned value. A Java program starts with main method and ends as soon as execution of main method finishes. ![]() When a method does not return any value, we need to specify void in method signature. “ void“:- It is a Java keyword first so written in small case. So only way is to declare main method as static so that JVM can load the class in to memory and can access static main method and start execution of program. JVM can not create an object of class at run time to access main method. You can access any static members without creating an object of class. When a Java class is loaded into memory, all its static members are also loaded in to memory unlike non-static members. Members declared as static in a Java class belong to class not its instance or object. “ static“: It is a Java keyword first so written in small case. If you do so, that main method will be considered as a normal java method and JVM will look for the main method with expected signature and throw error “Main method not found in class”. Declaring main method with any other access specifiers will not allow JVM to run it. Java Runtime Environment needs to call this main method outside of the class which is only possible if main method is made public. A public method can be accessed globally. Access modifiers are keywords in Java that set the accessibility of classes, methods, and other members. ![]() “ public“: It is a Java keyword first so written in small case. Let me break above method signature in to pieces so that you will understand it better. This could be also written as:- public static void main(String. Method signature of main method is given below:- public static void main(String args) I will try to explain my best it here.Ī Java program has a starting point of execution with a predefined signature of main method in a class. I hope this makes it clear for every one and thank you for helping me understand your response about the ‘Newsfeed feed ’.This is an important interview question in Java and mainly asked to Freshers. I suggest experimenting with this in a notepad with this java class and terminal because Codecademy in this module saves your progress in a manner that might hinder anyone to continuously experiment outside the module curriculum. The problem with doing this is that not only do we get an error, but logically we are always going to have the ‘humanTopics’ array printed out regardless if we input java Newsfeed Robot in the terminal. Otherwise, if we experiment with this, we can try using (feed.humanTopics) instead and go straight to printing it right out of the ‘if else’ statement. ![]() Meaning that to print the array that we choose in the terminal (Human) in the ‘if else’ lines of code, we have to use the ‘feed’ object along with the code ‘topics’ (feed.topics). This line uses ‘humanTopics’ as an argument, which is then passed to the constructor: If we start reading our code at the main method, we can trace back this line of code: If we can understand the ‘if, else if, and else’ statements running their respective line of code depending on what the argument is typed in the terminal, we can trace back to the information that is passed up in this entire code. None of the above? Find out where to ask other questions here! Have a question about your account or billing? Reach out to our customer support team! Looking for motivation to keep learning? Join our wider discussions in # communityįound a bug? Report it online, or post in #community:Codecademy-Bug-Reporting If you are wanting feedback or inspiration for a project, check out # project. Need broader help or resources? Head to # get-help and # community:tips-and-resources. You can also find further discussion and get answers to your questions over in # get-help.Īgree with a comment or answer? Like ( ) to up-vote the contribution! Help a fellow learner on their journey.Īsk or answer a question about this exercise by clicking reply ( ) below! If you’ve had an “aha” moment about the concepts, formatting, syntax, or anything else with this exercise, consider sharing those insights! Teaching others and answering their questions is one of the best ways to learn and stay sharp. Ask or answer a question by clicking reply ( ) below. There are currently no frequently asked questions associated with this exercise – that’s where you come in! You can contribute to this section by offering your own questions, answers, or clarifications on this exercise. This exercise can be found in the following Codecademy content: This community-built FAQ covers the “String args” exercise from the lesson “Learn Java: Arrays”. ![]()
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