jni的c代码GetFieldID失败

[飞天舞]

java类如下：
public class canFrame {

public int can_id;
public char can_dlc;
public byte[] bcan_id;
public byte[] recdata;
}

在C代码中调用
jfieldID id = (*env)->GetFieldID(env,objectClass,"can_id","I");//成功
jfieldID leng = (*env)->GetFieldID(env,objectClass,"can_dlc","C");//成功
jfieldID b_id = (*env)->GetFieldID(env,objectClass,"bcan_id","[B");//失败
jfieldID rdata = (*env)->GetFieldID(env,objectClass,"recdata","[B");//成功
错误提示：
java.lang.NoSuchFieldError: no field with name='bcan_id' signature='[B' in class Lforlinx/hardware/canFrame;

打开canFrame.class文件查看有看到bcan_id后有[B关键字，但recdata后没有

[usecf]

先调用这个jfieldID rdata = (*env)->GetFieldID(env,objectClass,"recdata","[B"); 后调用这个 jfieldID b_id = (*env)->GetFieldID(env,objectClass,"bcan_id","[B"); 看看什么效果 报的错误是否一样