diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TBufferOverflowException.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TBufferOverflowException.java
new file mode 100644
index 000000000..d690455bf
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TBufferOverflowException.java
@@ -0,0 +1,30 @@
+/*
+ *  Copyright 2015 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.java.nio.charset;
+
+import org.teavm.classlib.java.lang.TRuntimeException;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TBufferOverflowException extends TRuntimeException {
+    private static final long serialVersionUID = -94154470269902198L;
+
+    public TBufferOverflowException() {
+        super();
+    }
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TBufferUnderflowException.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TBufferUnderflowException.java
new file mode 100644
index 000000000..e628337e8
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TBufferUnderflowException.java
@@ -0,0 +1,28 @@
+/*
+ *  Copyright 2015 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.java.nio.charset;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TBufferUnderflowException extends RuntimeException {
+    private static final long serialVersionUID = 1162643612868888150L;
+
+    public TBufferUnderflowException() {
+        super();
+    }
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharacterCodingException.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharacterCodingException.java
new file mode 100644
index 000000000..0597dbda9
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharacterCodingException.java
@@ -0,0 +1,30 @@
+/*
+ *  Copyright 2015 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.java.nio.charset;
+
+import java.io.IOException;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TCharacterCodingException extends IOException {
+    private static final long serialVersionUID = -2432441010404243409L;
+
+    public TCharacterCodingException() {
+        super();
+    }
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharset.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharset.java
new file mode 100644
index 000000000..26bc0c1ef
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharset.java
@@ -0,0 +1,66 @@
+/*
+ *  Copyright 2015 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.java.nio.charset;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public abstract class TCharset implements Comparable<TCharset> {
+    private String canonicalName;
+    private String[] aliases;
+    private Set<String> aliasSet;
+
+    protected TCharset(String canonicalName, String[] aliases) {
+        this.canonicalName = canonicalName;
+        this.aliases = aliases.clone();
+    }
+
+    public static TCharset forName(String charsetName) {
+        return null;
+    }
+
+    public final String name() {
+        return canonicalName;
+    }
+
+    public final Set<String> aliases() {
+        if (aliasSet == null) {
+            aliasSet = new HashSet<>();
+            for (String alias : aliases) {
+                aliasSet.add(alias);
+            }
+            aliasSet = Collections.unmodifiableSet(aliasSet);
+        }
+        return aliasSet;
+    }
+
+    public String displayName() {
+        return canonicalName;
+    }
+
+    public abstract TCharsetDecoder newDecoder();
+
+    public abstract TCharsetEncoder newEncoder();
+
+    public boolean canEncode() {
+        return true;
+    }
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharsetDecoder.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharsetDecoder.java
new file mode 100644
index 000000000..e3587a204
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharsetDecoder.java
@@ -0,0 +1,24 @@
+/*
+ *  Copyright 2015 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.java.nio.charset;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TCharsetDecoder {
+
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharsetEncoder.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharsetEncoder.java
new file mode 100644
index 000000000..f09f10d8f
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharsetEncoder.java
@@ -0,0 +1,293 @@
+/*
+ *  Copyright 2015 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.java.nio.charset;
+
+import org.teavm.classlib.java.nio.TByteBuffer;
+import org.teavm.classlib.java.nio.TCharBuffer;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public abstract class TCharsetEncoder {
+    private static final int READY = 0;
+    private static final int ONGOING = 1;
+    private static final int END = 2;
+    private static final int FLUSH = 3;
+    private static final int INIT = 4;
+    private TCharset charset;
+    private byte[] replacement;
+    private float averageBytesPerChar;
+    private float maxBytesPerChar;
+    private TCodingErrorAction malformedAction = TCodingErrorAction.REPORT;
+    private TCodingErrorAction unmappableAction = TCodingErrorAction.REPORT;
+    private int status;
+    private boolean finished;
+
+    protected TCharsetEncoder(TCharset cs, float averageBytesPerChar, float maxBytesPerChar, byte[] replacement) {
+        checkReplacement(replacement);
+        this.charset = cs;
+        this.replacement = replacement.clone();
+        this.averageBytesPerChar = averageBytesPerChar;
+        this.maxBytesPerChar = maxBytesPerChar;
+        status = INIT;
+    }
+
+    protected TCharsetEncoder(TCharset cs, float averageBytesPerChar, float maxBytesPerChar) {
+        this(cs, averageBytesPerChar, maxBytesPerChar, new byte[] { (byte)'?' });
+    }
+
+    public final TCharset charset() {
+        return charset;
+    }
+
+    public final byte[] replacement() {
+        return replacement.clone();
+    }
+
+    public final TCharsetEncoder replaceWith(byte[] newReplacement) {
+        checkReplacement(newReplacement);
+        this.replacement = newReplacement.clone();
+        implReplaceWith(newReplacement);
+        return this;
+    }
+
+    private void checkReplacement(byte[] replacement) {
+        if (replacement == null || replacement.length == 0 || replacement.length < maxBytesPerChar) {
+            throw new IllegalArgumentException("Replacement preconditions do not hold");
+        }
+    }
+
+    protected void implReplaceWith(@SuppressWarnings("unused") byte[] newReplacement) {
+    }
+
+    public TCodingErrorAction malformedInputAction() {
+        return malformedAction;
+    }
+
+    public final TCharsetEncoder onMalformedInput(TCodingErrorAction newAction) {
+        if (newAction == null) {
+            throw new IllegalArgumentException("Action must be non-null");
+        }
+        malformedAction = newAction;
+        implOnMalformedInput(newAction);
+        return this;
+    }
+
+    protected void implOnMalformedInput(@SuppressWarnings("unused") TCodingErrorAction newAction) {
+    }
+
+    public TCodingErrorAction unmappableCharacterAction() {
+        return unmappableAction;
+    }
+
+    public final TCharsetEncoder onUnmappableCharacter(TCodingErrorAction newAction) {
+        if (newAction == null) {
+            throw new IllegalArgumentException("Action must be non-null");
+        }
+        unmappableAction = newAction;
+        implOnUnmappableCharacter(newAction);
+        return this;
+    }
+
+    protected void implOnUnmappableCharacter(@SuppressWarnings("unused") TCodingErrorAction newAction) {
+    }
+
+    public final float averageBytesPerChar() {
+        return averageBytesPerChar;
+    }
+
+    public final float maxBytesPerChar() {
+        return maxBytesPerChar;
+    }
+
+    public final TCoderResult encode(TCharBuffer in, TByteBuffer out, boolean endOfInput) {
+        if (status == READY && finished && !endOfInput) {
+            throw new IllegalStateException();
+        }
+
+        if (status == FLUSH || !endOfInput && status == END) {
+            throw new IllegalStateException();
+        }
+
+        TCoderResult result;
+        while (true) {
+            try {
+                result = encodeLoop(in, out);
+            } catch (TBufferOverflowException e) {
+                throw new TCoderMalfunctionError(e);
+            } catch (TBufferUnderflowException e) {
+                throw new TCoderMalfunctionError(e);
+            }
+            if (result == TCoderResult.UNDERFLOW) {
+                status = endOfInput ? END : ONGOING;
+                if (endOfInput) {
+                    int remaining = in.remaining();
+                    if (remaining > 0) {
+                        result = TCoderResult.malformedForLength(remaining);
+                    } else {
+                        return result;
+                    }
+                } else {
+                    return result;
+                }
+            } else if (result == TCoderResult.OVERFLOW) {
+                status = endOfInput ? END : ONGOING;
+                return result;
+            }
+            TCodingErrorAction action = malformedAction;
+            if (result.isUnmappable()) {
+                action = unmappableAction;
+            }
+            if (action == TCodingErrorAction.REPLACE) {
+                if (out.remaining() < replacement.length) {
+                    return TCoderResult.OVERFLOW;
+                }
+                out.put(replacement);
+            } else {
+                if (action != TCodingErrorAction.IGNORE) {
+                    return result;
+                }
+            }
+            in.position(in.position() + result.length());
+        }
+    }
+
+    public final TByteBuffer encode(TCharBuffer in) throws TCharacterCodingException {
+        if (in.remaining() == 0) {
+            return TByteBuffer.allocate(0);
+        }
+        reset();
+        int length = (int)(in.remaining() * averageBytesPerChar);
+        TByteBuffer output = TByteBuffer.allocate(length);
+        TCoderResult result = null;
+        while (true) {
+            result = encode(in, output, false);
+            if (result == TCoderResult.UNDERFLOW) {
+                break;
+            } else if (result == TCoderResult.OVERFLOW) {
+                output = allocateMore(output);
+                continue;
+            }
+            checkCoderResult(result);
+        }
+        result = encode(in, output, true);
+        checkCoderResult(result);
+
+        while (true) {
+            result = flush(output);
+            if (result == TCoderResult.UNDERFLOW) {
+                output.flip();
+                break;
+            } else if (result == TCoderResult.OVERFLOW) {
+                output = allocateMore(output);
+                continue;
+            }
+            checkCoderResult(result);
+            output.flip();
+            if (result.isMalformed()) {
+                throw new TMalformedInputException(result.length());
+            } else if (result.isUnmappable()) {
+                throw new TUnmappableCharacterException(result.length());
+            }
+            break;
+        }
+        status = READY;
+        finished = true;
+        return output;
+    }
+
+    protected abstract TCoderResult encodeLoop(TCharBuffer in, TByteBuffer out);
+
+    public boolean canEncode(char c) {
+        return implCanEncode(TCharBuffer.wrap(new char[] { c }));
+    }
+
+    private boolean implCanEncode(TCharBuffer cb) {
+        if (status == FLUSH || status == INIT) {
+            status = READY;
+        }
+        if (status != READY) {
+            throw new IllegalStateException();
+        }
+        TCodingErrorAction malformBak = malformedAction;
+        TCodingErrorAction unmapBak = unmappableAction;
+        onMalformedInput(TCodingErrorAction.REPORT);
+        onUnmappableCharacter(TCodingErrorAction.REPORT);
+        boolean result = true;
+        try {
+            encode(cb);
+        } catch (TCharacterCodingException e) {
+            result = false;
+        }
+        onMalformedInput(malformBak);
+        onUnmappableCharacter(unmapBak);
+        reset();
+        return result;
+    }
+
+    public boolean canEncode(CharSequence sequence) {
+        TCharBuffer cb;
+        if (sequence instanceof TCharBuffer) {
+            cb = ((TCharBuffer)sequence).duplicate();
+        } else {
+            cb = TCharBuffer.wrap(sequence);
+        }
+        return implCanEncode(cb);
+    }
+
+    private void checkCoderResult(TCoderResult result) throws TCharacterCodingException {
+        if (malformedAction == TCodingErrorAction.REPORT && result.isMalformed()) {
+            throw new TMalformedInputException(result.length());
+        } else if (unmappableAction == TCodingErrorAction.REPORT && result.isUnmappable()) {
+            throw new TUnmappableCharacterException(result.length());
+        }
+    }
+
+    private TByteBuffer allocateMore(TByteBuffer output) {
+        if (output.capacity() == 0) {
+            return TByteBuffer.allocate(1);
+        }
+        TByteBuffer result = TByteBuffer.allocate(output.capacity() * 2);
+        output.flip();
+        result.put(output);
+        return result;
+    }
+
+    public final TCoderResult flush(TByteBuffer out) {
+        if (status != END && status != READY) {
+            throw new IllegalStateException();
+        }
+        TCoderResult result = implFlush(out);
+        if (result == TCoderResult.UNDERFLOW) {
+            status = FLUSH;
+        }
+        return result;
+    }
+
+    protected TCoderResult implFlush(@SuppressWarnings("unused") TByteBuffer out) {
+        return TCoderResult.UNDERFLOW;
+    }
+
+    public final TCharsetEncoder reset() {
+        status = INIT;
+        implReset();
+        return this;
+    }
+
+    protected void implReset() {
+    }
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCoderMalfunctionError.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCoderMalfunctionError.java
new file mode 100644
index 000000000..31c2873b3
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCoderMalfunctionError.java
@@ -0,0 +1,28 @@
+/*
+ *  Copyright 2015 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.java.nio.charset;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TCoderMalfunctionError extends Error {
+    private static final long serialVersionUID = 8030591981317653860L;
+
+    public TCoderMalfunctionError(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCoderResult.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCoderResult.java
new file mode 100644
index 000000000..5bedfd3d3
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCoderResult.java
@@ -0,0 +1,81 @@
+/*
+ *  Copyright 2015 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.java.nio.charset;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TCoderResult {
+    public static final TCoderResult UNDERFLOW = new TCoderResult((byte)0, 0);
+    public static final TCoderResult OVERFLOW = new TCoderResult((byte)1, 0);
+    private byte kind;
+    private int length;
+
+    TCoderResult(byte kind, int length) {
+        super();
+        this.kind = kind;
+        this.length = length;
+    }
+
+    public boolean isUnderflow() {
+        return kind == 0;
+    }
+
+    public boolean isOverflow() {
+        return kind == 1;
+    }
+
+    public boolean isError() {
+        return isMalformed() || isUnmappable();
+    }
+
+    public boolean isMalformed() {
+        return kind == 2;
+    }
+
+    public boolean isUnmappable() {
+        return kind == 3;
+    }
+
+    public int length() {
+        if (!isError()) {
+            throw new UnsupportedOperationException();
+        }
+        return length;
+    }
+
+    public static TCoderResult malformedForLength(int length) {
+        return new TCoderResult((byte)2, length);
+    }
+
+    public static TCoderResult unmappableForLength(int length) {
+        return new TCoderResult((byte)3, length);
+    }
+
+    public void throwException() throws TCharacterCodingException {
+        switch (kind) {
+            case 0:
+                throw new TBufferUnderflowException();
+            case 1:
+                throw new TBufferOverflowException();
+            case 2:
+                throw new TMalformedInputException(length);
+            case 3:
+                throw new TUnmappableCharacterException(length);
+        }
+    }
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCodingErrorAction.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCodingErrorAction.java
new file mode 100644
index 000000000..2c0633f4a
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCodingErrorAction.java
@@ -0,0 +1,36 @@
+/*
+ *  Copyright 2015 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.java.nio.charset;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TCodingErrorAction {
+    public static final TCodingErrorAction IGNORE = new TCodingErrorAction("IGNORE");
+    public static final TCodingErrorAction REPLACE = new TCodingErrorAction("REPLACE");
+    public static final TCodingErrorAction REPORT = new TCodingErrorAction("REPORT");
+    private String name;
+
+    public TCodingErrorAction(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return name;
+    }
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TMalformedInputException.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TMalformedInputException.java
new file mode 100644
index 000000000..b3dbd8f79
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TMalformedInputException.java
@@ -0,0 +1,38 @@
+/*
+ *  Copyright 2015 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.java.nio.charset;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TMalformedInputException extends TCharacterCodingException {
+    private static final long serialVersionUID = -7677315548693161814L;
+    private int length;
+
+    public TMalformedInputException(int length) {
+        this.length = length;
+    }
+
+    public int getLength() {
+        return length;
+    }
+
+    @Override
+    public String getMessage() {
+        return "Malformed input of length " + length;
+    }
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TUnmappableCharacterException.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TUnmappableCharacterException.java
new file mode 100644
index 000000000..dcf5c1ee5
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TUnmappableCharacterException.java
@@ -0,0 +1,38 @@
+/*
+ *  Copyright 2015 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.java.nio.charset;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TUnmappableCharacterException extends TCharacterCodingException {
+    private static final long serialVersionUID = 4225770757749997199L;
+    private int length;
+
+    public TUnmappableCharacterException(int length) {
+        this.length = length;
+    }
+
+    public int getLength() {
+        return length;
+    }
+
+    @Override
+    public String getMessage() {
+        return "Unmappable characters of length " + length;
+    }
+}