How do I decode a UTF-8 string?

the core functions are getBytes(String charset) and new String(byte[] data) . you can use these functions to do UTF-8 decoding. Then the key is the parameter for input encoded string to get internal byte array, which you should know beforehand.

What does UTF-8 mean in Java?

Unicode Transformation Format
UTF-8 is a variable width character encoding. UTF-8 has the ability to be as condensed as ASCII but can also contain any Unicode characters with some increase in the size of the file. UTF stands for Unicode Transformation Format. The ‘8’ signifies that it allocates 8-bit blocks to denote a character.

Is Java a UTF-8 string?

String objects in Java use the UTF-16 encoding that can’t be modified. The only thing that can have a different encoding is a byte[] . So if you need UTF-8 data, then you need a byte[] .

How do I overcome Unicode decode error?

tl;dr / quick fix

1. Don’t decode/encode willy nilly.
2. Don’t assume your strings are UTF-8 encoded.
3. Try to convert strings to Unicode strings as soon as possible in your code.
4. Fix your locale: How to solve UnicodeDecodeError in Python 3.6?
5. Don’t be tempted to use quick reload hacks.

Does Java use UTF-8 or UTF-16?

In the absence of file. encoding attribute, Java uses “UTF-8” character encoding by default. Character encoding basically interprets a sequence of bytes into a string of specific characters. The same combination of bytes can denote different characters in different character encoding.

Is UTF-8 the same as Ascii?

UTF-8 encodes Unicode characters into a sequence of 8-bit bytes. Each 8-bit extension to ASCII differs from the rest. For characters represented by the 7-bit ASCII character codes, the UTF-8 representation is exactly equivalent to ASCII, allowing transparent round trip migration.

What is readUTF?

The readUTF(DataInput in) method of DataInputStream class reads from the stream in a representation of a Unicode character string encoded in modified UTF-8 format. This string of characters is then returned as a String.

How to encode a string to UTF-8 in Java?

Encoding a String into UTF-8 isn’t difficult, but it’s not that intuitive. This tutorial presents three ways of doing it, either using core Java or using Apache Commons Codec. As always, the code samples can be found over on GitHub. Comments are closed on this article!

Can You decode a Base64 string to UTF 8?

Otherwise the platform default encoding will be used which is not necessarily UTF-8 per se. So I can decode from Base64 spanish characthers as á,ñ,í,ü. will return: ¿Qué tal?

Can a string be encoded with UTF-8 or GB18030?

i.e “国家标准” is neither UTF-8 nor GB18030, it is just a String object. But it can be encoded with UTF-8, GB18030, because these encodings can encode all unicode code points. Of course, the decoding system must use the same character encoding on the bytes as the encoding system.

When do you need a byte for UTF-8?

So if you need UTF-8 data, then you need a byte[]. If you have a String that contains unexpected data, then the problem is at some earlier place that incorrectly converted some binary data to a String (i.e. it was using the wrong encoding). Technically speaking, byte[] doesn’t have any encoding.