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By default, Character and String use UTF-16, however, for all practical purposes, in North America and most of the english locales, UTF-8 is sufficient (since it can go upto 4 bytes). So, if I use a InputStreamReader(InputStream), then does it give me default UTF-16 char encoding? Using a InputStreamReader(InputStream, "UTF-8") would provide a UTF-8 encoding, which would suffice my purpose.
How can I auto-set my JVM's default encoding to UTF-8 while using English locale? The intention is to improve performance for Character and String manipulation (by using 8-bit scheme instead of 16-bit encoding and most ASCII is covered using 8-bit encoding and at the same time complying with Unicode standard).
Any comments are appreciated. Thanks!
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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.
There are three different Unicode character encodings: UTF-8, UTF-16 and UTF-32.
Browsers will typically use the value of the XML encoding declaration, or default to UTF-8 if there is none. Second, if there is a UTF-8 BOM on the document, and the XML encoding declaration is either UTF-8 or not included, the document will be interpreted as UTF-8, regardless of the charset used in the Content-Type.
The in-memory data types for text in java, char, Character, and String, are UTF-16. Absolutely. Always. Unconditionally.
The only thing you can change is how Java converts from bytes-on-the-outside to chars-on-the-inside. There is no way to change the representation to UTF-8 to trade space for time.
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