jni example

jclass doubleClass = env->FindClass("java/lang/Double");

jmethodID doubleCreator = env->GetMethodID( doubleClass, "<init>", "(D)V" );
jdouble v = 123.123;
jobject doubleObject = env->NewObject( doubleClass, doubleCreator, v );

jclass springAppContextClass = env->FindClass("org/springframework/context/support/FileSystemXmlApplicationContext");

jmethodID creator = env->GetMethodID( springAppContextClass, "<init>", "(Ljava/lang/String;)V" );

jstring fileName = env->NewStringUTF( "applictionContext.xml" );

springAppContext = env->NewObject( springAppContextClass, creator, fileName );

void or value type: V void, I jint,  J jlong,  D jdouble, Z boolean

<init>