Which utf

Are they same? February 23, at AM Anonymous said September 16, at AM vijaypratap said October 24, at PM Unknown said Use utf16 August 21, at PM Anonymous said December 11, at PM. Newer Post Older Post Home. Subscribe to: Post Comments Atom. Subscribe for Discounts and Updates Follow. Search This Blog. Interview Questions core java interview question data structure and algorithm 78 Coding Interview Question 75 interview questions 70 design patterns 35 SQL Interview Questions 34 object oriented programming 34 thread interview questions 30 spring interview questions 28 collections interview questions 25 database interview questions 16 servlet interview questions 15 Programming interview question 6 hibernate interview questions 6.

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Is it possible to have an abstract method in a fin Top 5 Courses to learn Groovy and Grails in Why Enum Singleton are better in Java? Difference between repaint and revalidate method i This is great — no more ambiguity — each letter is represented by its own unique number. The major problem is that there are more than of them. The characters will no longer fit into 8 bits. However Unicode is not a character set or code page. They just came up with the idea and left someone else to sort out the implementation.

That will be discussed in the next two sections. Unicode does not fit into 8 bits, not even into Although only , code points are in use, it has the capability to define up to 1,, of them, which would require 21 bits.

However, computers have advanced since the s. An 8 bit microprocessor is a bit out of date. Internally, modern Web browsers use these wide characters or something similar and can theoretically quite happily deal with over 4 billion distinct characters. This is plenty for Unicode. So — i nternally, modern Web browers use Unicode. For each number, it tells the browser to display the corresponding Unicode code point:.

A selection of Unicode code points viewed in Firefox. The screenshot above only shows a subset of the first few thousand code points output by the Javascript.

The selection includes some Cyrillic and Arabic characters, displayed right-to-left. The important point here is that Javascript runs completely in the Web browser where 32 bit characters are perfectly acceptable. The Javascript function String. So if browsers can deal with Unicode in 32 bit characters, where is the problem?

The problem is in the sending and receiving, and reading and writing of characters. Although browsers can deal with Unicode internally, you still have to get the data from the Web server to the Web browser and back again, and you need to save it in a file or database somewhere.

So you still need a way to make , Unicode code points fit into just 8 bits. UTF-8 is a clever. It works a bit like the Shift key on your keyboard.

But if you press Shift first, a capital H will appear. For instance, characters and shift you into the Cyrillic range. Characters are like a double shift. UTF-8 is therefore a multi-byte variable-width encoding. Variable-width because some characters like H take only 1 byte and some up to 4.

Unlike some of the other proposed solutions, any document written only in ASCII, using only characters , is perfectly valid UTF-8 as well — which saves bandwidth and hassle. This is a different experiment. The browser interprets those numbers as UTF-8, and internally converts them into Unicode code points. Then Javascript outputs the Unicode values. The sequence of numbers above shown using the UTF-8 character set. Same sequence of numbers shown using the ISO character set.

This is what is happening:. Notice that when viewed as ISO the first 5 numbers are the same 72, , , , as their Unicode code points. This is because Unicode borrowed heavily from ISO in that range.

It is at position in ISO and has the Unicode value UTF-8 is becoming the most popular international character set on the Internet, superseding the older single-byte character sets like ISO To get the byte-length of a Unicode string encoded in utf-8, you could do:.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Test a string if it's Unicode, which UTF standard is and get its length in bytes? Ask Question. Asked 9 years, 2 months ago. Active 7 years, 11 months ago.

Viewed 55k times. Latter edit: pprint does that pretty well. Improve this question. Eduard Florinescu. If necessary, set up UTF-8 as the default for new documents in your editor. The picture below shows how you would do that in the preferences of an editor such as Dreamweaver. You may also need to check that your server is serving documents with the right HTTP declarations, since it will otherwise override the in-document information see below.

Web pages must be able to communicate seamlessly with back-end scripts, databases, and such. These, of course, all work best with UTF-8, too. Developers can find a detailed set of things to consider in the article Migrating to Unicode. An HTML page can only be in one encoding. You cannot encode different parts of a document in different encodings. A Unicode-based encoding such as UTF-8 can support many languages and can accommodate pages and forms in any mixture of those languages.

Its use also eliminates the need for server-side logic to individually determine the character encoding for each page served or each incoming form submission. This significantly reduces the complexity of dealing with a multilingual site or application. A Unicode encoding also allows many more languages to be mixed on a single page than any other choice of encoding.

Any barriers to using Unicode are very low these days.