diff --git a/core/jni/android_media_JetPlayer.cpp b/core/jni/android_media_JetPlayer.cpp
index a785f52133627..5795aba1cb67e 100644
--- a/core/jni/android_media_JetPlayer.cpp
+++ b/core/jni/android_media_JetPlayer.cpp
@@ -130,9 +130,10 @@ android_media_JetPlayer_loadFromFile(JNIEnv *env, jobject thiz, jstring path)
 {
     JetPlayer *lpJet = (JetPlayer *)env->GetIntField(
         thiz, javaJetPlayerFields.nativePlayerInJavaObj);
-    if (lpJet == NULL ) {
+    if (lpJet == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
             "Unable to retrieve JetPlayer pointer for openFile()");
+        return JNI_FALSE;
     }
 
     // set up event callback function
@@ -166,9 +167,10 @@ android_media_JetPlayer_loadFromFileD(JNIEnv *env, jobject thiz,
 {
     JetPlayer *lpJet = (JetPlayer *)env->GetIntField(
         thiz, javaJetPlayerFields.nativePlayerInJavaObj);
-    if (lpJet == NULL ) {
+    if (lpJet == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
             "Unable to retrieve JetPlayer pointer for openFile()");
+        return JNI_FALSE;
     }
 
     // set up event callback function
@@ -195,9 +197,10 @@ android_media_JetPlayer_closeFile(JNIEnv *env, jobject thiz)
 {
     JetPlayer *lpJet = (JetPlayer *)env->GetIntField(
         thiz, javaJetPlayerFields.nativePlayerInJavaObj);
-    if (lpJet == NULL ) {
+    if (lpJet == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
             "Unable to retrieve JetPlayer pointer for closeFile()");
+        return JNI_FALSE;
     }
 
     if (lpJet->closeFile()==EAS_SUCCESS) {
@@ -216,9 +219,10 @@ android_media_JetPlayer_play(JNIEnv *env, jobject thiz)
 {
     JetPlayer *lpJet = (JetPlayer *)env->GetIntField(
         thiz, javaJetPlayerFields.nativePlayerInJavaObj);
-    if (lpJet == NULL ) {
+    if (lpJet == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
             "Unable to retrieve JetPlayer pointer for play()");
+        return JNI_FALSE;
     }
 
     EAS_RESULT result = lpJet->play();
@@ -239,9 +243,10 @@ android_media_JetPlayer_pause(JNIEnv *env, jobject thiz)
 {
     JetPlayer *lpJet = (JetPlayer *)env->GetIntField(
         thiz, javaJetPlayerFields.nativePlayerInJavaObj);
-    if (lpJet == NULL ) {
+    if (lpJet == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
             "Unable to retrieve JetPlayer pointer for pause()");
+        return JNI_FALSE;
     }
 
     EAS_RESULT result = lpJet->pause();
@@ -268,9 +273,10 @@ android_media_JetPlayer_queueSegment(JNIEnv *env, jobject thiz,
 {
     JetPlayer *lpJet = (JetPlayer *)env->GetIntField(
         thiz, javaJetPlayerFields.nativePlayerInJavaObj);
-    if (lpJet == NULL ) {
+    if (lpJet == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
             "Unable to retrieve JetPlayer pointer for queueSegment()");
+        return JNI_FALSE;
     }
 
     EAS_RESULT result
@@ -294,9 +300,10 @@ android_media_JetPlayer_queueSegmentMuteArray(JNIEnv *env, jobject thiz,
 {
     JetPlayer *lpJet = (JetPlayer *)env->GetIntField(
         thiz, javaJetPlayerFields.nativePlayerInJavaObj);
-    if (lpJet == NULL ) {
+    if (lpJet == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
             "Unable to retrieve JetPlayer pointer for queueSegmentMuteArray()");
+        return JNI_FALSE;
     }
 
     EAS_RESULT result=EAS_FAILURE;
@@ -339,9 +346,10 @@ android_media_JetPlayer_setMuteFlags(JNIEnv *env, jobject thiz,
 {
     JetPlayer *lpJet = (JetPlayer *)env->GetIntField(
         thiz, javaJetPlayerFields.nativePlayerInJavaObj);
-    if (lpJet == NULL ) {
+    if (lpJet == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
             "Unable to retrieve JetPlayer pointer for setMuteFlags()");
+        return JNI_FALSE;
     }
 
     EAS_RESULT result;
@@ -363,9 +371,10 @@ android_media_JetPlayer_setMuteArray(JNIEnv *env, jobject thiz,
 {
     JetPlayer *lpJet = (JetPlayer *)env->GetIntField(
         thiz, javaJetPlayerFields.nativePlayerInJavaObj);
-    if (lpJet == NULL ) {
+    if (lpJet == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
             "Unable to retrieve JetPlayer pointer for setMuteArray()");
+        return JNI_FALSE;
     }
 
     EAS_RESULT result=EAS_FAILURE;
@@ -408,9 +417,10 @@ android_media_JetPlayer_setMuteFlag(JNIEnv *env, jobject thiz,
 {
     JetPlayer *lpJet = (JetPlayer *)env->GetIntField(
         thiz, javaJetPlayerFields.nativePlayerInJavaObj);
-    if (lpJet == NULL ) {
+    if (lpJet == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
             "Unable to retrieve JetPlayer pointer for setMuteFlag()");
+        return JNI_FALSE;
     }
 
     EAS_RESULT result;
@@ -433,9 +443,10 @@ android_media_JetPlayer_triggerClip(JNIEnv *env, jobject thiz, jint clipId)
 {
     JetPlayer *lpJet = (JetPlayer *)env->GetIntField(
         thiz, javaJetPlayerFields.nativePlayerInJavaObj);
-    if (lpJet == NULL ) {
+    if (lpJet == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
             "Unable to retrieve JetPlayer pointer for triggerClip()");
+        return JNI_FALSE;
     }
 
     EAS_RESULT result;
@@ -457,9 +468,10 @@ android_media_JetPlayer_clearQueue(JNIEnv *env, jobject thiz)
 {
     JetPlayer *lpJet = (JetPlayer *)env->GetIntField(
         thiz, javaJetPlayerFields.nativePlayerInJavaObj);
-    if (lpJet == NULL ) {
+    if (lpJet == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
             "Unable to retrieve JetPlayer pointer for clearQueue()");
+        return JNI_FALSE;
     }
 
     EAS_RESULT result = lpJet->clearQueue();