jad文件的错误代码及一些错误解决，不断补充

 jad ( Java Application Discriptor ) 文件是J2ME的一个重要的组成部分，大多数手机需要有jad文件才能安装程序，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。在网上找到了这些代码的解释，和大家分享如下：

publicstatic final int JAD_SERVER_NOT_FOUND = 1;
public static final intJAD_NOT_FOUND = 2;
public static final int MISSING_PROVIDER_CERT =4;
public static final int CORRUPT_PROVIDER_CERT = 5;
public static finalint UNKNOWN_CA = 6;
public static final int INVALID_PROVIDER_CERT =7;
public static final int CORRUPT_SIGNATURE = 8;
public static final intINVALID_SIGNATURE = 9;
public static final int UNSUPPORTED_CERT =10;
public static final int EXPIRED_PROVIDER_CERT = 11;
public staticfinal int EXPIRED_CA_KEY = 12;
public static final intMISSING_SUITE_NAME = 13;
public static final int MISSING_VENDOR =14;
public static final int MISSING_VERSION = 15;
public static final intINVALID_VERSION = 16;
public static final int OLD_VERSION = 17;
publicstatic final int MISSING_JAR_URL = 18;
public static final intJAR_SERVER_NOT_FOUND = 19;
public static final int JAR_NOT_FOUND =20;
public static final int MISSING_JAR_SIZE = 21;
public static finalint SUITE_NAME_MISMATCH = 25;
public static final int VERSION_MISMATCH =26;
public static final int VENDOR_MISMATCH = 27;
public static final intINVALID_KEY = 28;
public static final int INVALID_VALUE = 29;
publicstatic final int INSUFFICIENT_STORAGE = 30;
public static final intJAR_SIZE_MISMATCH = 31;
public static final int NEW_VERSION = 32;
publicstatic final int UNAUTHORIZED = 33;
public static final int JAD_MOVED =34;
public static final int CANNOT_AUTH = 35;
public static final intCORRUPT_JAR = 36;
public static final int INVALID_JAD_TYPE = 37;
publicstatic final int INVALID_JAR_TYPE = 38;
public static final intALREADY_INSTALLED = 39;
public static final int DEVICE_INCOMPATIBLE =40;
public static final int MISSING_CONFIGURATION = 41;
public staticfinal int MISSING_PROFILE = 42;
public static final int INVALID_JAD_URL= 43;
public static final int INVALID_JAR_URL = 44;
public static finalint PUSH_DUP_FAILURE = 45;
public static final int PUSH_FORMAT_FAILURE =46;
public static final int PUSH_PROTO_FAILURE = 47;
public static finalint PUSH_CLASS_FAILURE = 48;
public static final intAUTHORIZATION_FAILURE = 49;
public static final int ATTRIBUTE_MISMATCH =50;
public static final int PROXY_AUTH = 51;
public static final intTRUSTED_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。不错错误原因及解决。

例如

31：指应用程序描述符中的 jar 大小值与真正的 jar 文件大小不匹配。手动修改jad里面midlet jar size大小为实际包大小，重启工程好了。具体出错原因没研究，感觉是工程自动build的bug。

36： jad文件中的Midlet Jar URL指定错误，默认的jar应该和jad放在同一目录才可以运行。
    选择JAD URL来运行时，最好选择deployed目录下的jad文件，而不要使用项目根目录下的那个，因为默认打包的jar放在deployed下。