Why do we use scanner

Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. The function returns true if the scanner has a token of that type, otherwise false. For example, in the below code, we have used hasNextInt. To check for a string, we use hasNextLine. Similarly, to check for a single character, we use hasNext. Let us look at the code snippet to read some numbers from console and print their mean.

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Skip to content. Change Language. Related Articles. The people on the committee or team that designed it made that decision. Someone somewhere also made the decision to name the language Java. You should read the Scanner class' documentation. Scanner nextInt is a convenience method, you can easily read bytes from System. Also, should the System class have every possible method for parsing input, or should another class handle that task and let System stick to what it's meant to do instead of being bloated.

You obviously can just use System. Add a comment. Active Oldest Votes. Improve this answer. GhostCat GhostCat k 23 23 gold badges silver badges bronze badges. The word "bloat" also came to my mind in regard to including scanner methods. What is it? In your Eclipse environment whenever you make a new project there is a standard library that contains classes like: Scanner, String, ArrayList and so on. Man, it is called JDK. IDE does not contain any classes! Feel free to suggest edits when you believe you can make a post more helpful.

As for why this is the case, see GhostCat's answer. Seelenvirtuose Seelenvirtuose Sign up or log in Sign up using Google. Sign up using Facebook.

Sign up using Email and Password. Post as a guest Name. If you do need to communicate with a fax machine, you can use an online fax service to send a scanned image directly to a fax machine. Ed Wills began writing professionally in As a tech writer, he developed numerous software manuals making complex software accessible to common users.

An entrepreneur, he has also written widely on business and finance. What Is the Purpose of a Scanner? By Ed Wills. Paper File Reduction If your file drawer is overflowing, it is time to consider scanning some of those documents and saving them in your computer instead of your desk.

Photos Photographs fade with age. Optical Character Recognition Scanners come with optical character recognition software that enables them to convert characters into text. Fax Replacement Many home scanners come equipped with a modem so they can fax scanned documents or images directly to a fax machine, but many homes have replaced their land-based phone lines with cell phones.