Sample1.c

#include "Sample1.h"
#include <string.h>

JNIEXPORT jint JNICALL Java_Sample1_intMethod
	(JNIEnv *env, jobject obj, jint num) {
		return num * num;
	}

JNIEXPORT jboolean JNICALL Java_Sample1_booleanMethod
	(JNIEnv *env, jobject obj, jboolean boolean) {
		return !boolean;
	}

JNIEXPORT jstring JNICALL Java_Sample1_stringMethod
	(JNIEnv *env, jobject obj, jstring string) {
		const char *str = (*env)->GetStringUTFChars(env, string, 0);
		char cap[128];
		strcpy(cap, str);
		(*env)->ReleaseStringUTFChars(env, string, str);
		return (*env)->NewStringUTF(env, strupr(cap));
	}

JNIEXPORT jint JNICALL Java_Sample1_intArrayMethod
	(JNIEnv *env, jobject obj, jintArray array) {
		int i, sum = 0;
		jsize len = (*env)->GetArrayLength(env, array);
		jint *body = (*env)->GetIntArrayElements(env, array, 0);
		for (i=0; i<len; i++)
		{   sum += body[i];
		}
		(*env)->ReleaseIntArrayElements(env, array, body, 0);
		return sum;
	}

void main(){}