Types of Java comments.

Java supports single-line, multi-line comments, and documentation comments. Documentation comments are understood by Javadoc tool and can be used to create HTML based documentation.

/** is known as documentation comments. It is used by Javadoc tool while creating the documentation for the program code.

/* is used for multi-line comments.

// is used for single line comments

Example

Live Demo

/**
   * This is a documentation comment.
   * This is my first Java program.
   * This will print 'Hello World' as the output
   * This is an example of multi-line comments.
*/
public class MyFirstJavaProgram {
   public static void main(String[] args) {
      /* This is an example of multi line comment. */
 
      // This is a single line comment.
      System.out.println("Hello World");
   }
}