Should java classes be in separate files?

It is technically legal to have multiple Java top level classes in one file. However this is considered to be bad practice (in most cases), and some Java tools may not work if you do this. The JLS says this: When packages are stored in a file system (§7.2.

Can we write 2 classes in a single Java file?

You can use at most one public class per one java file (COMPILATION UNIT) and unlimited number of separate package-private classes. You also can have in your public class the unlimited number of inner classes and static nested classes .

Can you have 2 classes in the same 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.

How many classes are required in a java program?

A single Java program contains two or more classes, it is possible in two ways in Java.

Can you create separate classes as separate files?

2 Answers. Of course you can separate out 2 classes and still they will work fine. Just make sure you import one class in another using import statement. All you need to do is move AnotherClass class into a separate source file named with name same as class name ie “AnotherClass.

How do you create a separate class in java?

Java Classes and Objects

1. Java Classes/Objects. Java is an object-oriented programming language.
2. Create a Class. To create a class, use the keyword class :
3. Create an Object. In Java, an object is created from a class.
4. Multiple Objects. You can create multiple objects of one class:
5. Using Multiple Classes.

Can there be multiple classes in 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.

How do you create a separate class in Java?

Why do we use multiple classes in Java?

Originally Answered: Why do we need to create multiple classes and methods in Java? We don’t need to create multiple classes and methods in Java. We do so because it is practical to do so in many situations. Small and simple programs rarely benefit much from the use of various classes and methods.

How do you call one Java file from another Java class file?

2 Answers

1. Make the method of B class public (or public static)
2. Create a object of B class in A (or if method is static this step is not required)
3. Using that object(in case of static user class name) call the method.