jad ( Java Application Discriptor ) 文件是J2ME的一个重要的组成部分,在我们发布J2ME程序的时候,jad文件经常报出各种错误,如: com.sun.kvem.midletsuite.InvalidJadException: Reason = 13 其中的错误原因是1-52的代码,很让人费解。我在网上找到了这些代码的解释,和大家分享如下: public static final int JAD_SERVER_NOT_FOUND = 1; public static final int JAD_NOT_FOUND = 2; public static final int MISSING_PROVIDER_CERT = 4; public static final int CORRUPT_PROVIDER_CERT = 5; public static final int UNKNOWN_CA = 6; public static final int INVALID_PROVIDER_CERT = 7; public static final int CORRUPT_SIGNATURE = 8; public static final int INVALID_SIGNATURE = 9; public static final int UNSUPPORTED_CERT = 10; public static final int EXPIRED_PROVIDER_CERT = 11; public static final int EXPIRED_CA_KEY = 12; public static final int MISSING_SUITE_NAME = 13; public static final int MISSING_VENDOR = 14; public static final int MISSING_VERSION = 15; public static final int INVALID_VERSION = 16; public static final int OLD_VERSION = 17; public static final int MISSING_JAR_URL = 18; public static final int JAR_SERVER_NOT_FOUND = 19; public static final int JAR_NOT_FOUND = 20; public static final int MISSING_JAR_SIZE = 21; public static final int SUITE_NAME_MISMATCH = 25; public static final int VERSION_MISMATCH = 26; public static final int VENDOR_MISMATCH = 27; public static final int INVALID_KEY = 28; public static final int INVALID_VALUE = 29; public static final int INSUFFICIENT_STORAGE = 30; public static final int JAR_SIZE_MISMATCH = 31; public static final int NEW_VERSION = 32; public static final int UNAUTHORIZED = 33; public static final int JAD_MOVED = 34; public static final int CANNOT_AUTH = 35; public static final int CORRUPT_JAR = 36; public static final int INVALID_JAD_TYPE = 37; public static final int INVALID_JAR_TYPE = 38; public static final int ALREADY_INSTALLED = 39; public static final int DEVICE_INCOMPATIBLE = 40; public static final int MISSING_CONFIGURATION = 41; public static final int MISSING_PROFILE = 42; public static final int INVALID_JAD_URL = 43; public static final int INVALID_JAR_URL = 44; public static final int PUSH_DUP_FAILURE = 45; public static final int PUSH_FORMAT_FAILURE = 46; public static final int PUSH_PROTO_FAILURE = 47; public static final int PUSH_CLASS_FAILURE = 48; public static final int AUTHORIZATION_FAILURE = 49; public static final int ATTRIBUTE_MISMATCH = 50; public static final int PROXY_AUTH = 51; public static final int TRUSTED_OVERWRITE_FAILURE = 52; 有了这些代码的解释,我们就很容易知道错误的原因了。 另外,大家知道,有的手机在安装jar文件的时候,不需要jad文件。这是因为手机厂商在操作系统中内置了对jar文件的解析功能。就如同手机自动生成jad文件,然后使用这个jad文件安装jar文件一样。 
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