diff --git a/java/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderUtils.java b/java/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderUtils.java
index 665c7a2..2c3d134 100644
--- a/java/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderUtils.java
+++ b/java/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderUtils.java
@@ -295,7 +295,6 @@
                 return address;
             }
         }
-        int address;
         switch (optionFlags & FormatSpec.MASK_CHILDREN_ADDRESS_TYPE) {
             case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_ONEBYTE:
                 return dictBuffer.readUnsignedByte();
diff --git a/java/src/com/android/inputmethod/latin/makedict/BinaryDictEncoderUtils.java b/java/src/com/android/inputmethod/latin/makedict/BinaryDictEncoderUtils.java
index af61f29..b602424 100644
--- a/java/src/com/android/inputmethod/latin/makedict/BinaryDictEncoderUtils.java
+++ b/java/src/com/android/inputmethod/latin/makedict/BinaryDictEncoderUtils.java
@@ -278,7 +278,6 @@
         // For future reference, the code to remove duplicate is a simple : list.remove(node);
         list.add(ptNodeArray);
         final ArrayList<PtNode> branches = ptNodeArray.mData;
-        final int nodeSize = branches.size();
         for (PtNode ptNode : branches) {
             if (null != ptNode.mChildren) flattenTreeInner(list, ptNode.mChildren);
         }
@@ -427,9 +426,6 @@
                         nodeCountSize + nodeArrayOffset + nodeffset;
                 nodeffset += ptNode.mCachedSize;
             }
-            final int nodeSize = nodeCountSize + nodeffset
-                    + (formatOptions.mSupportsDynamicUpdate
-                            ? FormatSpec.FORWARD_LINK_ADDRESS_SIZE : 0);
             nodeArrayOffset += nodeArray.mCachedSize;
         }
         return nodeArrayOffset;
@@ -653,8 +649,8 @@
         return flags;
     }
 
-    /* package */ static byte makePtNodeFlags(final PtNode node, final int ptNodeAddress,
-            final int childrenOffset, final FormatOptions formatOptions) {
+    /* package */ static byte makePtNodeFlags(final PtNode node, final int childrenOffset,
+            final FormatOptions formatOptions) {
         return (byte) makePtNodeFlags(node.mChars.length > 1, node.mFrequency >= 0,
                 getByteSize(childrenOffset),
                 node.mShortcutTargets != null && !node.mShortcutTargets.isEmpty(),
diff --git a/java/src/com/android/inputmethod/latin/makedict/DynamicBinaryDictIOUtils.java b/java/src/com/android/inputmethod/latin/makedict/DynamicBinaryDictIOUtils.java
index 411e265..5c69941 100644
--- a/java/src/com/android/inputmethod/latin/makedict/DynamicBinaryDictIOUtils.java
+++ b/java/src/com/android/inputmethod/latin/makedict/DynamicBinaryDictIOUtils.java
@@ -59,7 +59,7 @@
             throws IOException, UnsupportedFormatException {
         final DictBuffer dictBuffer = dictDecoder.getDictBuffer();
         dictBuffer.position(0);
-        final FileHeader header = dictDecoder.readHeader();
+        dictDecoder.readHeader();
         final int wordPosition = dictDecoder.getTerminalPosition(word);
         if (wordPosition == FormatSpec.NOT_VALID_WORD) return;
 
@@ -142,8 +142,7 @@
         final int originalPosition = dictBuffer.position();
         dictBuffer.position(ptNodeOriginAddress);
         final int flags = dictBuffer.readUnsignedByte();
-        final int parentAddress = BinaryDictDecoderUtils.readParentAddress(dictBuffer,
-                formatOptions);
+        BinaryDictDecoderUtils.readParentAddress(dictBuffer, formatOptions);
         BinaryDictIOUtils.skipString(dictBuffer, (flags & FormatSpec.FLAG_HAS_MULTIPLE_CHARS) != 0);
         if ((flags & FormatSpec.FLAG_IS_TERMINAL) != 0) dictBuffer.readUnsignedByte();
         final int childrenOffset = newChildrenAddress == FormatSpec.NO_CHILDREN_ADDRESS
diff --git a/java/src/com/android/inputmethod/latin/makedict/SparseTable.java b/java/src/com/android/inputmethod/latin/makedict/SparseTable.java
index 9c327fa..7592a0c 100644
--- a/java/src/com/android/inputmethod/latin/makedict/SparseTable.java
+++ b/java/src/com/android/inputmethod/latin/makedict/SparseTable.java
@@ -212,7 +212,6 @@
     @UsedForTesting
     public static SparseTable readFromFiles(final File lookupTableFile, final File[] contentFiles,
             final int blockSize) throws IOException {
-        final byte[] lookupTable = readFileToByteArray(lookupTableFile);
         final ArrayList<ArrayList<Integer>> contentTables =
                 new ArrayList<ArrayList<Integer>>(contentFiles.length);
         for (int i = 0; i < contentFiles.length; ++i) {
diff --git a/java/src/com/android/inputmethod/latin/makedict/Ver3DictEncoder.java b/java/src/com/android/inputmethod/latin/makedict/Ver3DictEncoder.java
index 76f0f40..d9e1989 100644
--- a/java/src/com/android/inputmethod/latin/makedict/Ver3DictEncoder.java
+++ b/java/src/com/android/inputmethod/latin/makedict/Ver3DictEncoder.java
@@ -133,12 +133,10 @@
                 countSize);
     }
 
-    private void writePtNodeFlags(final PtNode ptNode, final int parentAddress,
-            final FormatOptions formatOptions) {
+    private void writePtNodeFlags(final PtNode ptNode, final FormatOptions formatOptions) {
         final int childrenPos = BinaryDictEncoderUtils.getChildrenPosition(ptNode, formatOptions);
         mPosition = BinaryDictEncoderUtils.writeUIntToBuffer(mBuffer, mPosition,
-                BinaryDictEncoderUtils.makePtNodeFlags(ptNode, mPosition, childrenPos,
-                        formatOptions),
+                BinaryDictEncoderUtils.makePtNodeFlags(ptNode, childrenPos, formatOptions),
                 FormatSpec.PTNODE_FLAGS_SIZE);
     }
 
@@ -244,7 +242,7 @@
     @Override
     public void writePtNode(final PtNode ptNode, final int parentPosition,
             final FormatOptions formatOptions, final FusionDictionary dict) {
-        writePtNodeFlags(ptNode, parentPosition, formatOptions);
+        writePtNodeFlags(ptNode, formatOptions);
         writeParentPosition(parentPosition, ptNode, formatOptions);
         writeCharacters(ptNode.mChars, ptNode.hasSeveralChars());
         writeFrequency(ptNode.mFrequency);
diff --git a/java/src/com/android/inputmethod/latin/makedict/Ver4DictDecoder.java b/java/src/com/android/inputmethod/latin/makedict/Ver4DictDecoder.java
index 27cb1c2..624b278 100644
--- a/java/src/com/android/inputmethod/latin/makedict/Ver4DictDecoder.java
+++ b/java/src/com/android/inputmethod/latin/makedict/Ver4DictDecoder.java
@@ -95,7 +95,6 @@
 
     @Override
     public void openDictBuffer() throws FileNotFoundException, IOException {
-        final String filename = mDictDirectory.getName();
         mDictBuffer = mBufferFactory.getDictionaryBuffer(getFile(FILETYPE_TRIE));
         mFrequencyBuffer = mBufferFactory.getDictionaryBuffer(getFile(FILETYPE_FREQUENCY));
         mTerminalAddressTableBuffer = mBufferFactory.getDictionaryBuffer(
diff --git a/java/src/com/android/inputmethod/latin/makedict/Ver4DictEncoder.java b/java/src/com/android/inputmethod/latin/makedict/Ver4DictEncoder.java
index d8a2dc8..a403e25 100644
--- a/java/src/com/android/inputmethod/latin/makedict/Ver4DictEncoder.java
+++ b/java/src/com/android/inputmethod/latin/makedict/Ver4DictEncoder.java
@@ -181,12 +181,10 @@
                 countSize);
     }
 
-    private void writePtNodeFlags(final PtNode ptNode, final int parentAddress,
-            final FormatOptions formatOptions) {
+    private void writePtNodeFlags(final PtNode ptNode, final FormatOptions formatOptions) {
         final int childrenPos = BinaryDictEncoderUtils.getChildrenPosition(ptNode, formatOptions);
         mTriePos = BinaryDictEncoderUtils.writeUIntToBuffer(mTrieBuf, mTriePos,
-                BinaryDictEncoderUtils.makePtNodeFlags(ptNode, mTriePos, childrenPos,
-                        formatOptions),
+                BinaryDictEncoderUtils.makePtNodeFlags(ptNode, childrenPos, formatOptions),
                 FormatSpec.PTNODE_FLAGS_SIZE);
     }
 
@@ -292,7 +290,7 @@
     @Override
     public void writePtNode(final PtNode ptNode, final int parentPosition,
             final FormatOptions formatOptions, final FusionDictionary dict) {
-        writePtNodeFlags(ptNode, parentPosition, formatOptions);
+        writePtNodeFlags(ptNode, formatOptions);
         writeParentPosition(parentPosition, ptNode, formatOptions);
         writeCharacters(ptNode.mChars, ptNode.hasSeveralChars());
         if (ptNode.isTerminal()) {
diff --git a/tests/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderEncoderTests.java b/tests/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderEncoderTests.java
index be98a84..0cf4ef9 100644
--- a/tests/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderEncoderTests.java
+++ b/tests/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderEncoderTests.java
@@ -546,8 +546,7 @@
     }
 
     private long checkGetTerminalPosition(final DictDecoder dictDecoder, final String word,
-            int index, boolean contained) {
-        final int expectedFrequency = (UNIGRAM_FREQ + index) % 255;
+            final boolean contained) {
         long diff = -1;
         int position = -1;
         try {
@@ -605,7 +604,7 @@
         // Test a word that is contained within the dictionary.
         long sum = 0;
         for (int i = 0; i < sWords.size(); ++i) {
-            final long time = checkGetTerminalPosition(dictDecoder, sWords.get(i), i, true);
+            final long time = checkGetTerminalPosition(dictDecoder, sWords.get(i), true);
             sum += time == -1 ? 0 : time;
         }
         Log.d(TAG, "per search : " + (((double)sum) / sWords.size() / 1000000) + " : " + message
@@ -618,11 +617,11 @@
         for (int i = 0; i < 1000; ++i) {
             final String word = CodePointUtils.generateWord(random, codePointSet);
             if (sWords.indexOf(word) != -1) continue;
-            checkGetTerminalPosition(dictDecoder, word, i, false);
+            checkGetTerminalPosition(dictDecoder, word, false);
         }
     }
 
-    private void runGetTerminalPositionTests(final ArrayList<String> results, final int bufferType,
+    private void runGetTerminalPositionTests(final int bufferType,
             final FormatOptions formatOptions) {
         runGetTerminalPosition(sWords, sEmptyBigrams, bufferType, formatOptions, "unigram");
     }
@@ -630,17 +629,17 @@
     public void testGetTerminalPosition() {
         final ArrayList<String> results = CollectionUtils.newArrayList();
 
-        runGetTerminalPositionTests(results, USE_BYTE_ARRAY, VERSION2);
-        runGetTerminalPositionTests(results, USE_BYTE_ARRAY, VERSION3_WITHOUT_DYNAMIC_UPDATE);
-        runGetTerminalPositionTests(results, USE_BYTE_ARRAY, VERSION3_WITH_DYNAMIC_UPDATE);
-        runGetTerminalPositionTests(results, USE_BYTE_ARRAY, VERSION4_WITHOUT_DYNAMIC_UPDATE);
-        runGetTerminalPositionTests(results, USE_BYTE_ARRAY, VERSION4_WITH_DYNAMIC_UPDATE);
+        runGetTerminalPositionTests(USE_BYTE_ARRAY, VERSION2);
+        runGetTerminalPositionTests(USE_BYTE_ARRAY, VERSION3_WITHOUT_DYNAMIC_UPDATE);
+        runGetTerminalPositionTests(USE_BYTE_ARRAY, VERSION3_WITH_DYNAMIC_UPDATE);
+        runGetTerminalPositionTests(USE_BYTE_ARRAY, VERSION4_WITHOUT_DYNAMIC_UPDATE);
+        runGetTerminalPositionTests(USE_BYTE_ARRAY, VERSION4_WITH_DYNAMIC_UPDATE);
 
-        runGetTerminalPositionTests(results, USE_BYTE_BUFFER, VERSION2);
-        runGetTerminalPositionTests(results, USE_BYTE_BUFFER, VERSION3_WITHOUT_DYNAMIC_UPDATE);
-        runGetTerminalPositionTests(results, USE_BYTE_BUFFER, VERSION3_WITH_DYNAMIC_UPDATE);
-        runGetTerminalPositionTests(results, USE_BYTE_BUFFER, VERSION4_WITHOUT_DYNAMIC_UPDATE);
-        runGetTerminalPositionTests(results, USE_BYTE_BUFFER, VERSION4_WITH_DYNAMIC_UPDATE);
+        runGetTerminalPositionTests(USE_BYTE_BUFFER, VERSION2);
+        runGetTerminalPositionTests(USE_BYTE_BUFFER, VERSION3_WITHOUT_DYNAMIC_UPDATE);
+        runGetTerminalPositionTests(USE_BYTE_BUFFER, VERSION3_WITH_DYNAMIC_UPDATE);
+        runGetTerminalPositionTests(USE_BYTE_BUFFER, VERSION4_WITHOUT_DYNAMIC_UPDATE);
+        runGetTerminalPositionTests(USE_BYTE_BUFFER, VERSION4_WITH_DYNAMIC_UPDATE);
 
         for (final String result : results) {
             Log.d(TAG, result);
diff --git a/tests/src/com/android/inputmethod/latin/makedict/SparseTableTests.java b/tests/src/com/android/inputmethod/latin/makedict/SparseTableTests.java
index 26d4f2d..aeb8552 100644
--- a/tests/src/com/android/inputmethod/latin/makedict/SparseTableTests.java
+++ b/tests/src/com/android/inputmethod/latin/makedict/SparseTableTests.java
@@ -23,7 +23,6 @@
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
-import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.Random;
@@ -69,7 +68,7 @@
     }
 
     private void generateRandomIndex(final int size, final int prop) {
-        for (int i = 0; i < DEFAULT_SIZE; ++i) {
+        for (int i = 0; i < size; ++i) {
             if (mRandom.nextInt(100) < prop) {
                 mRandomIndex.set(i, mRandom.nextInt());
             } else {
@@ -98,8 +97,6 @@
         // flush and reload
         OutputStream lookupOutStream = null;
         OutputStream contentOutStream = null;
-        InputStream lookupInStream = null;
-        InputStream contentInStream = null;
         try {
             final File lookupIndexFile = File.createTempFile("testRandomSet", ".small");
             final File contentFile = File.createTempFile("testRandomSet", ".big");