43 lines
983 B
C
43 lines
983 B
C
#include <jni.h>
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#include "martin.h"
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#include <stdio.h>
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void Java_martin_myNative(JNIEnv* env, jobject this, jstring s)
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{
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jclass cls;
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jfieldID fid;
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jobject obj;
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jmethodID mid;
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printf("From C\n");
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fflush(stdout);
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cls = (*env)->FindClass(env, "java/lang/System");
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if (cls == 0) {
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printf("java/lang/System lookup failed\n");
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return;
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}
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fid = (*env)->GetStaticFieldID(env, cls, "out", "Ljava/io/PrintStream;");
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if (fid == 0) {
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printf("java/lang/System::out lookup failed\n");
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return;
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}
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obj = (*env)->GetStaticObjectField(env, cls, fid);
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if (obj == 0) {
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printf("GetStaticObjectField call failed\n");
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return;
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}
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cls = (*env)->GetObjectClass(env, obj);
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if (cls == 0) {
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printf("GetObjectClass(out) failed\n");
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return;
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}
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mid = (*env)->GetMethodID(env, cls, "println", "(Ljava/lang/String;)V");
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if (mid == 0) {
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printf("println method lookup failed\n");
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return;
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}
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(*env)->CallVoidMethod(env, obj, mid, s);
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}
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