What is the suffix of java source code?

In Java, the suffix of source code files is usually .java. When writing a Java program, a source code file with a .java suffix is ​​created, which contains the Java source code. For example, a simple Java source code file could be named MyClass.java, where MyClass is the name of the class and .java is the suffix of the file.

Operating system for this tutorial: Windows 10 system, Dell G3 computer.

In Java, the suffix of source code files is usually .java. When you write a Java program, you create a source code file with a .java suffix that contains the Java source code. For example, a simple Java source code file could be named MyClass.java, where MyClass is the name of the class and .java is the suffix of the file.

Some basic concepts of the Java language:

1. Classes and objects: A class is an abstraction of an object. It is a template that defines how to create objects with specific properties and behaviors. Objects are instances of classes.
2. Encapsulation: Encapsulation is one of the three major characteristics of object-oriented programming. It hides the internal state of an object and prevents direct external access. By using access modifiers (such as public, private, protected), you can control external code's access to members of a class.
3. Inheritance: Inheritance is the process of deriving a new class from an existing class. The new class inherits all properties and methods of the original class, and can add or overwrite members of the original class to create new behaviors.
4. Polymorphism: Polymorphism is one of the three major characteristics of object-oriented programming. It allows an interface to be implemented by multiple classes, or an interface can have multiple implementation forms.
5. Exception handling: Exception handling in Java uses try, catch, and finally statements to handle errors or exceptions that may occur in the program.
6. Streaming input/output: Java's streaming input/output is used to interact with resources such as files and network connections. Java provides many classes and interfaces for input/output, such as FileInputStream, FileOutputStream, InputStreamReader, etc.
7. Collection Framework: The Java collection framework provides interfaces and classes for storing and operating collections of objects. For example, ArrayList, LinkedList, HashSet, etc.
8. Generics: Generics are a new feature introduced in Java 5 that allow type-parameterized classes and methods to be defined at compile time to achieve more flexible and safe code.
9. Concurrent programming: Java provides multi-threading support, allowing the program to perform multiple tasks at the same time. In addition, Java also provides a concurrency package (java.util.concurrent) and other concurrency tool classes to simplify concurrent programming.
10. Network programming: Java provides APIs for network programming, including the Socket and ServerSocket classes, which are used to implement network communication based on the TCP/IP protocol.

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