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java程序显示中文是大家都遇到过的问题，尤其是JAD文件的中文问题，一般都用native2ascii工具转换，这里收藏了native2ascii工具的详细说明
native2ascii – Native-to-ASCII Converter
Converts a file with native-encoded characters (characters which are non-Latin 1 and non-Unicode) to one with Unicode-encoded characters.
SYNOPSIS
native2ascii [options] [inputfile [outputfile]]

DESCRIPTION
The Java compiler and other Java tools can only process files which contain Latin-1 and/or Unicode-encoded (\udddd notation) characters. native2ascii converts files which contain other character encodings into files containing Latin-1 and/or Unicode-encoded charaters.
If outputfile is omitted, standard output is used for output. If, in addition, inputfile is omitted, standard input is used for input.

OPTIONS
-reverse
Perform the reverse operation: convert a file with Latin-1 and/or Unicode encoded characters to one with native-encoded characters.

-encoding encoding_name
Specify the encoding name which is used by the conversion procedure. The default encoding is taken from System property file.encoding. The encoding_name string must be a string taken from the first column of the table below.

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Converter Description
Class
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8859_1 ISO 8859-1
8859_2 ISO 8859-2
8859_3 ISO 8859-3
8859_4 ISO 8859-4
8859_5 ISO 8859-5
8859_6 ISO 8859-6
8859_7 ISO 8859-7
8859_8 ISO 8859-8
8859_9 ISO 8859-9
Big5 Big5, Traditional Chinese
CNS11643 CNS 11643, Traditional Chinese
Cp037 USA, Canada(Bilingual, French), Netherlands,
Portugal, Brazil, Australia
Cp1006 IBM AIX Pakistan (Urdu)
Cp1025 IBM Multilingual Cyrillic: Bulgaria, Bosnia,
Herzegovinia, Macedonia(FYR)
Cp1026 IBM Latin-5, Turkey
Cp1046 IBM Open Edition US EBCDIC
Cp1097 IBM Iran(Farsi)/Persian
Cp1098 IBM Iran(Farsi)/Persian (PC)
Cp1112 IBM Latvia, Lithuania
Cp1122 IBM Estonia
Cp1123 IBM Ukraine
Cp1124 IBM AIX Ukraine
Cp1125 IBM Ukraine (PC)
Cp1250 Windows Eastern European
Cp1251 Windows Cyrillic
Cp1252 Windows Latin-1
Cp1253 Windows Greek
Cp1254 Windows Turkish
Cp1255 Windows Hebrew
Cp1256 Windows Arabic
Cp1257 Windows Baltic
Cp1258 Windows Vietnamese
Cp1381 IBM OS/2, DOS People’s Republic of China (PRC)
Cp1383 IBM AIX People’s Republic of China (PRC)
Cp273 IBM Austria, Germany
Cp277 IBM Denmark, Norway
Cp278 IBM Finland, Sweden
Cp280 IBM Italy
Cp284 IBM Catalan/Spain, Spanish Latin America
Cp285 IBM United Kingdom, Ireland
Cp297 IBM France
Cp33722 IBM-eucJP – Japanese (superset of 5050)
Cp420 IBM Arabic
Cp424 IBM Hebrew
Cp437 MS-DOS United States, Australia, New Zealand,
South Africa
Cp500 EBCDIC 500V1
Cp737 PC Greek
Cp775 PC Baltic
Cp838 IBM Thailand extended SBCS
Cp850 MS-DOS Latin-1
Cp852 MS-DOS Latin-2
Cp855 IBM Cyrillic
Cp857 IBM Turkish
Cp860 MS-DOS Portuguese
Cp861 MS-DOS Icelandic
Cp862 PC Hebrew
Cp863 MS-DOS Canadian French
Cp864 PC Arabic
Cp865 MS-DOS Nordic
Cp866 MS-DOS Russian
Cp868 MS-DOS Pakistan
Cp869 IBM Modern Greek
Cp870 IBM Multilingual Latin-2
Cp871 IBM Iceland
Cp874 IBM Thai
Cp875 IBM Greek
Cp918 IBM Pakistan(Urdu)
Cp921 IBM Latvia, Lithuania (AIX, DOS)
Cp922 IBM Estonia (AIX, DOS)
Cp930 Japanese Katakana-Kanji mixed with 4370 UDC,
superset of 5026
Cp933 Korean Mixed with 1880 UDC, superset of 5029
Cp935 Simplified Chinese Host mixed with 1880 UDC,
superset of 5031
Cp937 Traditional Chinese Host miexed with 6204 UDC,
superset of 5033
Cp939 Japanese Latin Kanji mixed with 4370 UDC,
superset of 5035
Cp942 Japanese (OS/2) superset of 932
Cp948 OS/2 Chinese (Taiwan) superset of 938
Cp949 PC Korean
Cp950 PC Chinese (Hong Kong, Taiwan)
Cp964 AIX Chinese (Taiwan)
Cp970 AIX Korean
EUCJIS JIS, EUC Encoding, Japanese
GB2312 GB2312, EUC encoding, Simplified Chinese
GBK GBK, Simplified Chinese
ISO2022CN ISO 2022 CN, Chinese
ISO2022CN_CNS CNS 11643 in ISO-2022-CN form, T. Chinese
ISO2022CN_GB GB 2312 in ISO-2022-CN form, S. Chinese
ISO2022KR ISO 2022 KR, Korean
JIS JIS, Japanese
JIS0208 JIS 0208, Japanese
KOI8_R KOI8-R, Russian
KSC5601 KS C 5601, Korean
MS874 Windows Thai
MacArabic Macintosh Arabic
MacCentralEurope Macintosh Latin-2
MacCroatian Macintosh Croatian
MacCyrillic Macintosh Cyrillic
MacDingbat Macintosh Dingbat
MacGreek Macintosh Greek
MacHebrew Macintosh Hebrew
MacIceland Macintosh Iceland
MacRoman Macintosh Roman
MacRomania Macintosh Romania
MacSymbol Macintosh Symbol
MacThai Macintosh Thai
MacTurkish Macintosh Turkish
MacUkraine Macintosh Ukraine
SJIS Shift-JIS, Japanese
UTF8 UTF-8

不过WTK可以直接解决JAD的中文问题：
settings>MidLets>MidLet-1属性改成你想要显示的中文后重新生成JAD和JAR文件即可。