Check out example codes for "how to add comments in java". It will help you in understanding the concepts better.
Code Example 1
//This is single line comment /* This is multi line comment */
Code Example 2
// Demo types of comments /* This shows that the comment can be muilti line */ System.out.println("Hello"); // Inline comment // This is a single line comment
Code Example 3
//This is a comment. It will only span one line /*This is a multi-line comment*/
Learn ReactJs, React Native from akashmittal.com