Why the Java filename should be always the same as a public class?

The filename must have the same name as the public class name in that file, which is the way to tell the JVM that this is an entry point. In this condition, we will not able to easily identify which class need to interpret by java interpreter and which class containing Entry point for the program.

When must the main class and the file name coincide?

113) When must the main class and the file name coincide? Ans :When class is declared public.

Can classname be main in Java?

The main() method can appear in any class that is part of an application, but if the application is a complex containing multiple files, it is common to create a separate class just for main(). The main class can have any name, although typically it will just be called “Main”.

Can class name and filename be different in java?

yes, you can choose any name for the file (. java). there is no matter to what are the name of classes in that file means that class names may be totaly different from the file name. you should compile the program with file name and you should run the program with the class name in which the main method exist.

Is java case sensitive or not?

Yes, it is case-sensitive. It is this way because of its heritage from C. To keep the language more familiar to what people were used to “in the day”, they left it as case-sensitive. There is an added advantage, since Java identifiers can be almost any Unicode character.

Can I compile a java file with a different name than the class?

yes, we compile a java file with a different name than the class, provided that there should not be any public class in that file. If there is any public class in file then in that case you have to give that name as file name. But if your class does not contain any public class then you can give any name to you class.

Can you save a java file without name?

what do you mean by without any name there need to be some name. Yes,it is possible to compile a java source file with different file name but you need to make sure none of the classes defined inside are public… when you compile the source file the corresponding .

Can I have multiple main methods in the same class?

Yes, you can have as many main methods as you like. You can have main methods with different signatures from main(String[]) which is called overloading, and the JVM will ignore those main methods. You can have one public static void main(String[] args) method in each class. Those two methods have the same signature.

Which software is used for Java programming?

The Java Development Kit (JDK) is a Sun product aimed at Java developers. Since the introduction of Java, it has been by far the most widely used Java software development kit (SDK). It contains a Java compiler, a full copy of the Java Runtime Environment (JRE), and many other important development tools.

Is class name and file name should be same in java?

Yes. This can be done. The main reason for the class and file name to be same are to make the job of the complier easy to check which class it needs to run, in the whole list of the Java classes. So it’s a good practice to have filename and class name as same.

Can the file name be different from the class name in Java?

Well the gist is better to always have the same name for the java file as the class name. For academic purpose, you may fiddle with the file name Vs class name to see what is permitted and what is restricted. If there is no public class then file name may be different from the class name in Java.

Can we compile a file with a different name than a class?

yes, we compile a java file with a different name than the class, provided that there should not be any public class in that file. If there is any public class in file then in that case you have to give that name as file name. But if your class does not contain any public class then you can give any name to you class.

Is it always necessary to have the file name and class name?

No its not always necessary that you should have your file name and class name same.But if you have different file name and class name then while compiling the java file you need to give file name but while executing that file you need to execute it by using the class name.

Is it possible to have multiple classes in a java file?

The myth about the file name and class name should be same only when the class is declared in public. Now, this .class file can be executed. By the above features, some more miracles can be done. It is possible to have many classes in a java file. For debugging purposes, this approach can be used.