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I thought Java determines 'file.encoding' system property by system locale.
But in my system while system locale is 'ko_kr.UTF-8', 'file.encoding' is 'ANSI_X3.4-1968'.
How does Java determine 'file.encoding' system property?
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The native character encoding of the Java programming language is UTF-16. A charset in the Java platform therefore defines a mapping between sequences of sixteen-bit UTF-16 code units (that is, sequences of chars) and sequences of bytes.
Files generally indicate their encoding with a file header. There are many examples here. However, even reading the header you can never be sure what encoding a file is really using. For example, a file with the first three bytes 0xEF,0xBB,0xBF is probably a UTF-8 encoded file.
Java supports a wide array of encodings and their conversions to each other. The class Charset defines a set of standard encodings which every implementation of Java platform is mandated to support. This includes US-ASCII, ISO-8859-1, UTF-8, and UTF-16 to name a few.
Native code populating properties from the below link(for solaris,Linux operating system )
Below native method loading system properties.
private static native Properties initProperties(Properties props);
Below link is the native code link for loading properties( after line number 187)
Source for setting java properties
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