Java Comments

In Java programming language, comments are used to add explanatory notes to the code that are ignored by the compiler and not executed as part of the program. Comments are useful for providing context, explaining the purpose of the code, and making it easier for other developers to understand and maintain the code.

Java supports three types of comments:

  1. Single-line comments: These comments begin with two forward slashes (//) and continue until the end of the line. They are used for short comments or explanations of a single line of code.
    int a = 10; // initializing the value of a to 10
  2. Multi-line comments: These comments begin with /* and end with */. They can span multiple lines and are used for longer comments or explanations.
    This method calculates the sum of two integers and returns the result
    public int sum(int a, int b) {
        return a + b;
  3. Documentation comments: These comments are similar to multi-line comments but are used to generate documentation for the code. They begin with /** and end with */. They are used for documenting classes, methods, and variables, and can include special tags to provide additional information, such as author, version, and parameters.
    * This class represents a student with a name and age
    * @author John Doe
    * @version 1.0
    public class Student {
        private String name;
        private int age;
        * Constructs a new Student with the given name and age
        * @param name the name of the student
        * @param age the age of the student
        public Student(String name, int age) {
   = name;
            this.age = age;

Comments are an important aspect of writing clear and maintainable code in Java. They help other developers understand the code and make it easier to modify or update in the future.

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