Sample1.cpp

#include "Sample1.h"
#include <ctype.h>
#include <string.h>
// Mutate array to uppercase
void uppercase(char* str) {
	size_t n = strlen(str);
	for (size_t i = 0; i < n; i++) {
		str[i] = toupper(str[i]);
	}
}

JNIEXPORT jint JNICALL Java_example_Sample1_intMethod
(JNIEnv* env, jobject obj, jint num) {
	return num*num;
}
JNIEXPORT jboolean JNICALL Java_example_Sample1_booleanMethod
(JNIEnv* env, jobject obj, jboolean boolean) {
	return !boolean;
}
JNIEXPORT jstring JNICALL Java_example_Sample1_stringMethod
(JNIEnv* env, jobject obj, jstring string) {
	const char* str = env->GetStringUTFChars(string, 0);
	char cap[128];
	strcpy(cap, str);  //此处在VS2013下编译为strcpy_s,linux和mac改为strcpy
	env->ReleaseStringUTFChars(string, str);
	uppercase(cap);
	return env->NewStringUTF(cap);
}
JNIEXPORT jint JNICALL Java_example_Sample1_intArrayMethod
(JNIEnv* env, jobject obj, jintArray array) {
	int sum = 0;
	jsize len = env->GetArrayLength(array);
	jint* body = env->GetIntArrayElements(array, 0);
	for (int i = 0; i < len; i++) {
		sum += body[i];
	}
	env->ReleaseIntArrayElements(array, body, 0);
	return sum;
}