GetStaticMethodID
jmethodID GetStaticMethodID(JNIEnv *env, jclass clazz, const char *name, const char *sig);
Returns the method ID for a static method of a class. The method is specified by its name and signature.
GetStaticMethodID()
causes an uninitialized class to be initialized.LINKAGE:
Index 113 in the JNIEnv interface function table.PARAMETERS:
env
: the JNI interface pointer.clazz
: a Java class object.name
: the static method name in a 0-terminated modified UTF-8 string.sig
: the method signature in a 0-terminated modified UTF-8 string.RETURNS of GetStaticMethodID
Returns a method ID, or
NULL
if the operation fails.THROWS:
NoSuchMethodError
: if the specified static method cannot be found.ExceptionInInitializerError
: if the class initializer fails due to an exception.OutOfMemoryError
: if the system runs out of memory.
Example of GetStaticMethodID
#include <jni.h>
#ifndef null
#define null NULL
#endif
typedef struct JavaVMCreationResult {
JavaVM* jvm;
JNIEnv* env;
} JVMCreationResult;
JVMCreationResult* CreateJavaVM() {
JavaVM* jvm;
JNIEnv* env;
JavaVMInitArgs args;
JavaVMOption opts[1];
opts[0].optionString = "-Djava.class.path=C:\\Users\\Claudia\\Desktop";
args.version = JNI_VERSION_1_6;
args.nOptions = 1;
args.options = opts;
args.ignoreUnrecognized = JNI_TRUE;
JNI_GetDefaultJavaVMInitArgs(&args);
JNI_CreateJavaVM(&jvm, (void **) &env, &args);
JVMCreationResult* cres = new JVMCreationResult();
cres->jvm = jvm;
cres->env = env;
return cres;
}
int main() {
JVMCreationResult* cres = CreateJavaVM();
JavaVM* jvm = cres->jvm;
JNIEnv* env = cres->env;
jclass cls = env->FindClass("Main");
if (cls) {
printf("Yes !\n");
}
else {
printf("No !\n");
}
jmethodID mid = env->GetStaticMethodID(cls, "main", "([Ljava/lang/String;)V");
env->CallStaticVoidMethod(cls, mid);
printf("At end of Program.");
}