77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
// Copied from
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// http://java.sun.com/docs/books/tutorial/native1.1/invoking/example-1dot1/invoke.c
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#include <jni.h>
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#ifdef _WIN32
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#define PATH_SEPARATOR ';'
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#else /* UNIX */
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#define PATH_SEPARATOR ':'
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#endif
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// #define USER_CLASSPATH "." /* where Prog.class is */
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extern void zsp_install(JNIEnv *env);
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main() {
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JNIEnv *env;
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JavaVM *jvm;
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JDK1_1InitArgs vm_args;
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jint res;
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jclass cls;
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jmethodID mid;
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jstring jstr;
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jobjectArray args;
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char classpath[1024];
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/* IMPORTANT: specify vm_args version # if you use JDK1.1.2 and beyond */
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vm_args.version = 0x00010001;
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JNI_GetDefaultJavaVMInitArgs(&vm_args);
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// Tjl
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vm_args.classpath = getenv("CLASSPATH");
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// /* Append USER_CLASSPATH to the end of default system class path */
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// sprintf(classpath, "%s%c%s",
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// vm_args.classpath, PATH_SEPARATOR, USER_CLASSPATH);
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// vm_args.classpath = classpath;
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/* Create the Java VM */
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res = JNI_CreateJavaVM(&jvm,&env,&vm_args);
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if (res < 0) {
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fprintf(stderr, "Can't create Java VM\n");
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exit(1);
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}
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zsp_install(env);
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cls = (*env)->FindClass(env, "foo/Test1");
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if (cls == 0) {
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fprintf(stderr, "Can't find foo/Test1 class\n");
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exit(1);
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}
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mid = (*env)->GetStaticMethodID(env, cls, "main", "([Ljava/lang/String;)V");
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if (mid == 0) {
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fprintf(stderr, "Can't find Prog.main\n");
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exit(1);
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}
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jstr = (*env)->NewStringUTF(env, " from C!");
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if (jstr == 0) {
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fprintf(stderr, "Out of memory\n");
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exit(1);
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}
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args = (*env)->NewObjectArray(env, 1,
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(*env)->FindClass(env, "java/lang/String"), jstr);
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if (args == 0) {
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fprintf(stderr, "Out of memory\n");
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exit(1);
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}
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(*env)->CallStaticVoidMethod(env, cls, mid, args);
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(*jvm)->DestroyJavaVM(jvm);
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}
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