Can we save the Java source file without any 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 .

Does every Java class need its own file?

According to Java standards and common practices, we should declare every class in its own source file. Each source file should contain only one public class and the name of that public class should be similar to the name of the source file.

Which name is same as class name?

Every class object is created using the same new keyword, so it must have information about the class to which it must create an object. For this reason, the constructor name should be the same as the class name.

Is Empty Java file name is valid for source file name?

Yes. An empty . java file is a perfectly valid source file.

Can we give Java file and class name with different?

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 we have multiple classes in the same java file?

Yes, we can have multiple classes in same java file. But, there is one restriction over here, which is that you can have as many classes in one file but only one public class is allowed. If we try to declare 2 classes as public in the same file, the code will not compile.

Can you have multiple classes in a Java source file?

Yes, it can. However, there can only be one public top-level class per . java file, and public top-level classes must have the same name as the source file.

When it is mandatory to save the program with the same name as the name of class in Java?

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. Suppose when we create a program in which more than one class resides and after compiling a java source file, it will generate the same number of the .

Why the file name should be same as class name containing main method?

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 we have multiple classes in same Java file?

Yes, it can. However, there can only be one public class per . java file, as public classes must have the same name as the source file. There can only be one public class top level class in a file.