Learn how to declare multiple classes in a single Java program with examples and best practices.

Jun 23, 2009 · One java source file can generate multiple class files, if your class contains inner classes. Anonymous inner classes are represented by your numbered class files. Every class …

A Java program may contain any number of classes. The following program comprises of two classes: Computer and Laptop, both the classes have their constructors and a method. In the …

Mar 16, 2025 · When working with Java, you might need to define and use multiple classes in a single program. Java allows this by treating each class as its own unit while letting them …

Feb 12, 2024 · Using multiple classes in one file in Java is often done for simplicity and when the classes are closely related or serve complementary purposes. It can make the codebase more …

May 19, 2021 · Class-based programs of Java-part 1. In Java every program has at least one class. All the programs are written in Java acts as a model of the real world having at least one …

Mar 27, 2025 · A class can extend another class and can implement one and more than one Java interface. Also, this topic has a major influence on the concept of Java and Multiple …

Oct 30, 2012 · One Java file can consist of multiple classes with the restriction that only one of them can be public. As soon as you remove public keyword from your classes, you can …

Sep 11, 2022 · When more than one classes inherit a same class then this is called hierarchical inheritance. For example class B, C and D extends a same class A. Lets see the diagram …

Jan 5, 2023 · Can we have two public classes in one file in Java: This is a common Java interview question. The short answer is No. We can’t define more than one public class in the same file. …