JNI中访问JList的代码

#include <jni.h>
void process_jlist(const JNIEnv *env, const jobject jlist)
{
  if (env == NULL || jlist == NULL)
  {
    return;
  }
  jclass list_cls = env->GetObjectClass(jlist);
  if (list_cls == NULL)
  {
    return;
  }
  jmethodID list_get  = env->GetMethodID(list_cls, "get",  "(I)Ljava/lang/Object;");
  jmethodID list_size = env->GetMethodID(list_cls, "size", "()I");
  int len = static_cast<int>(env->CallIntMethod(jlist, list_size));
  if (len == 0)
  {
     return;
  }
  for (int i=0; i < len; i++)
  {
    jstring element = (jstring)(env->CallObjectMethod(jlist, list_get, i));
    if (element == NULL)
    {
       continue;
    }
    // 注意是否有其他的内存泄露
    env->DeleteLocalRef(element);
  }
  //做点其他事情
}