Fix bug + formatting

Author: Ankit Gupta

java/Makefile

@@ -16,7 +16,7 @@ sample: java
 	javac -cp $(ROCKSDB_JAR) RocksDBSample.java
 	@rm -rf /tmp/rocksdbjni
 	@rm -rf /tmp/rocksdbjni_not_found
-	java -ea -Djava.library.path=. -cp ".:./*" -Xcheck:jni RocksDBSample /tmp/rocksdbjni
+	java -ea -Djava.library.path=.:../ -cp ".:./*" -Xcheck:jni RocksDBSample /tmp/rocksdbjni
 	@rm -rf /tmp/rocksdbjni
 	@rm -rf /tmp/rocksdbjni_not_found
 

java/RocksDBSample.java

@@ -5,6 +5,7 @@
 
 import java.util.Arrays;
 import java.util.List;
+import java.util.Map;
 import java.util.ArrayList;
 import org.rocksdb.*;
 import org.rocksdb.util.SizeUnit;
@@ -219,6 +220,25 @@ public static void main(String[] args) {
 
       iterator.close();
       System.out.println("iterator tests passed.");
+
+      iterator = db.newIterator();
+      List<byte[]> keys = new ArrayList<byte[]>();
+      for (iterator.seekToLast(); iterator.isValid(); iterator.prev()) {
+        keys.add(iterator.key());
+      }
+      iterator.close();
+
+      Map<byte[], byte[]> values = db.multiGet(keys);
+      assert(values.size() == keys.size());
+      for(byte[] value1 : values.values()) {
+        assert(value1 != null);
+      }
+
+      values = db.multiGet(new ReadOptions(), keys);
+      assert(values.size() == keys.size());
+      for(byte[] value1 : values.values()) {
+        assert(value1 != null);
+      }
     } catch (RocksDBException e) {
       System.err.println(e);
     }

java/rocksjni/rocksjni.cc

@@ -310,7 +310,7 @@ jobject multi_get_helper(JNIEnv* env, jobject jdb, rocksdb::DB* db,
  * Method:    multiGet
  * Signature: (JLjava/util/List;I)Ljava/util/List;
  */
-jobject Java_org_rocksdb_RocksDB_multiGet(
+jobject Java_org_rocksdb_RocksDB_multiGet__JLjava_util_List_2I(
     JNIEnv* env, jobject jdb, jlong jdb_handle,
     jobject jkey_list, jint jkeys_count) {
   return multi_get_helper(env, jdb, reinterpret_cast<rocksdb::DB*>(jdb_handle),
@@ -322,7 +322,7 @@ jobject Java_org_rocksdb_RocksDB_multiGet(
  * Method:    multiGet
  * Signature: (JJLjava/util/List;I)Ljava/util/List;
  */
-jobject Java_org_rocksdb_RocksDB_multiGet(
+jobject Java_org_rocksdb_RocksDB_multiGet__JJLjava_util_List_2I(
     JNIEnv* env, jobject jdb, jlong jdb_handle,
     jlong jropt_handle, jobject jkey_list, jint jkeys_count) {
   return multi_get_helper(env, jdb, reinterpret_cast<rocksdb::DB*>(jdb_handle),