Java comments are either explanations of the source code or descriptions of classes, interfaces, methods, and fields. There are three types of comments used in Java. These are:

1. Single Line Comments:

To add a comment in one line using two slash characters i.e. //text.Starting with the // text ignore by compiler.

//This is single line comment.

2. Multi Line Comments:

To add a comment in multi line start using slash and asterisk characters and end using asterisk and slash i.e. /*text*/.

/*This is multi line comment.
Welcome to Tech2Our. */

3. Documentation Comment.

The JDK javadoc tool uses doc comments when preparing automatically generated documentation.

/**Get the Student name and roll number.
*@ return this Student' name
*@ Mobile Number should be ten digit
*/