Comments in Java

Java Programming Language / Overview of Java Language

Comments can be used to explain Java code, and to make it more readable. It can also be used to prevent execution when testing alternative code.

Single-line comments start with two forward slashes (//).

Any text between // and the end of the line is ignored by Java (will not be executed).

This example uses a single-line comment before a line of code:

Example

// This is a comment
System.out.println("Hello World");

This example uses a single-line comment at the end of a line of code:

System.out.println("Hello World"); // This is a comment

Program:

 public class Sample {

   /* This is my first java program.
    * This is an example of multi-line comments.
    */

   public static void main(String []args) {
      // This is an example of single line comment
      /* This is also an example of single line comment. */
      System.out.println("This program is example of command");
   }
}

Output:

This program is example of command

Explanation:

/* The code below will print the words Hello World
to the screen, and it is amazing */
System.out.println("Hello World");