diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/io/TBufferedReader.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/io/TBufferedReader.java
new file mode 100644
index 000000000..04338c6df
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/io/TBufferedReader.java
@@ -0,0 +1,185 @@
+/*
+ *  Copyright 2014 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.io;
+
+import org.teavm.classlib.java.lang.TIllegalArgumentException;
+import org.teavm.classlib.java.lang.TMath;
+import org.teavm.classlib.java.lang.TString;
+import org.teavm.classlib.java.lang.TStringBuilder;
+import org.teavm.classlib.java.util.TArrays;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TBufferedReader extends TReader {
+    private TReader innerReader;
+    private char[] buffer;
+    private int index;
+    private int count;
+    private boolean eof;
+    private int mark = -1;
+
+    public TBufferedReader(TReader innerReader, int size) {
+        if (size < 0) {
+            throw new TIllegalArgumentException();
+        }
+        this.innerReader = innerReader;
+        this.buffer = new char[TMath.min(64, size)];
+    }
+
+    public TBufferedReader(TReader innerReader) {
+        this(innerReader, 1024);
+    }
+
+    @Override
+    public int read() throws TIOException {
+        requireOpened();
+        if (index >= count) {
+            if (!fillBuffer(0)) {
+                return -1;
+            }
+        }
+        return buffer[index++];
+    }
+
+    @Override
+    public void close() throws TIOException {
+        requireOpened();
+        innerReader.close();
+        innerReader = null;
+    }
+
+    @Override
+    public int read(char[] cbuf, int off, int len) throws TIOException {
+        requireOpened();
+        if (index == count && eof) {
+            return -1;
+        }
+        int charsRead = 0;
+        while (charsRead < len) {
+            int n = TMath.min(count - index, len - charsRead);
+            for (int i = 0; i < n; ++i) {
+                cbuf[off++] = buffer[index++];
+            }
+            charsRead += n;
+            if (!fillBuffer(0)) {
+                break;
+            }
+        }
+        return charsRead;
+    }
+
+    public TString readLine() throws TIOException {
+        requireOpened();
+        if (eof && index == count) {
+            return null;
+        }
+        TStringBuilder line = new TStringBuilder();
+        while (true) {
+            if (index >= count) {
+                if (!fillBuffer(0)) {
+                    break;
+                }
+            }
+            char ch = buffer[index++];
+            if (ch == '\n') {
+                break;
+            } else if (ch == '\r') {
+                if (index >= count) {
+                    if (!fillBuffer(0)) {
+                        break;
+                    }
+                }
+                if (buffer[index] == '\n') {
+                    ++index;
+                }
+                break;
+            } else {
+                line.append(ch);
+            }
+        }
+        return TString.wrap(line.toString());
+    }
+
+    @Override
+    public long skip(long n) throws TIOException {
+        requireOpened();
+        if (n < count - index) {
+            index += n;
+        } else {
+            n -= (count - index);
+            if (innerReader.skip(n) == n) {
+                fillBuffer(0);
+            }
+        }
+        return super.skip(n);
+    }
+
+    @Override
+    public boolean ready() {
+        return index < count;
+    }
+
+    @Override
+    public void mark(int readAheadLimit) throws TIOException {
+        if (readAheadLimit > buffer.length) {
+            buffer = TArrays.copyOf(buffer, readAheadLimit);
+        }
+        if (count - index < readAheadLimit) {
+            for (int i = index; i < count; ++i) {
+                buffer[i - index] = buffer[i];
+            }
+            fillBuffer(count - index);
+        }
+        mark = index;
+    }
+
+    @Override
+    public void reset() throws TIOException {
+        if (mark == -1) {
+            throw new TIOException();
+        }
+        index = mark;
+    }
+
+    private boolean fillBuffer(int offset) throws TIOException {
+        if (eof) {
+            return false;
+        }
+        while (true) {
+            int charsRead = innerReader.read(buffer, offset, buffer.length - 1);
+            if (charsRead == -1) {
+                eof = true;
+                break;
+            } else if (charsRead == 0) {
+                break;
+            } else {
+                offset += charsRead;
+            }
+        }
+        count = offset;
+        index = 0;
+        mark = -1;
+        return true;
+    }
+
+    private void requireOpened() {
+        if (innerReader == null) {
+            throw new TIOException();
+        }
+    }
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/io/TCloseable.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/io/TCloseable.java
index 1a0c5c117..52735c541 100644
--- a/teavm-classlib/src/main/java/org/teavm/classlib/java/io/TCloseable.java
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/io/TCloseable.java
@@ -23,5 +23,5 @@ import org.teavm.classlib.java.lang.TAutoCloseable;
  */
 public interface TCloseable extends TAutoCloseable {
     @Override
-    void close() throws TIOException;
+    public void close() throws TIOException;
 }
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/io/TStringReader.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/io/TStringReader.java
new file mode 100644
index 000000000..74f99efe7
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/io/TStringReader.java
@@ -0,0 +1,109 @@
+/*
+ *  Copyright 2014 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.io;
+
+import org.teavm.classlib.java.lang.TIllegalArgumentException;
+import org.teavm.classlib.java.lang.TMath;
+import org.teavm.classlib.java.lang.TNullPointerException;
+import org.teavm.classlib.java.lang.TString;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TStringReader extends TReader {
+    private TString string;
+    private int index;
+    private int mark = 0;
+
+    public TStringReader(TString string) {
+        if (string == null) {
+            throw new TNullPointerException();
+        }
+        this.string = string;
+    }
+
+    @Override
+    public int read() throws TIOException {
+        checkOpened();
+        if (index >= string.length()) {
+            return -1;
+        }
+        return string.charAt(index++);
+    }
+
+    @Override
+    public int read(char[] cbuf, int off, int len) throws TIOException {
+        checkOpened();
+        if (index >= string.length()) {
+            return -1;
+        }
+        int n = TMath.min(string.length() - index, len);
+        for (int i = 0; i < n; ++i) {
+            cbuf[off++] = string.charAt(index++);
+        }
+        return n;
+    }
+
+    @Override
+    public long skip(long n) throws TIOException {
+        checkOpened();
+        if (n < 0) {
+            n = TMath.max(n, -index);
+        } else {
+            n = TMath.min(string.length() - index, n);
+        }
+        index += n;
+        return n;
+    }
+
+    @Override
+    public boolean ready() throws TIOException {
+        checkOpened();
+        return true;
+    }
+
+    @Override
+    public boolean markSupported() {
+        return true;
+    }
+
+    @Override
+    public void mark(int readAheadLimit) throws TIOException {
+        checkOpened();
+        if (readAheadLimit < 0) {
+            throw new TIllegalArgumentException();
+        }
+        mark = index;
+    }
+
+    @Override
+    public void reset() throws TIOException {
+        checkOpened();
+        index = mark;
+    }
+
+    @Override
+    public void close() {
+        string = null;
+    }
+
+    private void checkOpened() throws TIOException {
+        if (string == null) {
+            throw new TIOException();
+        }
+    }
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TByte.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TByte.java
new file mode 100644
index 000000000..536f219b3
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TByte.java
@@ -0,0 +1,88 @@
+/*
+ *  Copyright 2014 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.lang;
+
+import org.teavm.javascript.ni.Rename;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TByte extends TNumber implements TComparable<TByte> {
+    private byte value;
+
+    public TByte(byte value) {
+        this.value = value;
+    }
+
+    @Override
+    public int intValue() {
+        return value;
+    }
+
+    @Override
+    public long longValue() {
+        return value;
+    }
+
+    @Override
+    public float floatValue() {
+        return value;
+    }
+
+    @Override
+    public double doubleValue() {
+        return value;
+    }
+
+    @Override
+    public byte byteValue() {
+        return value;
+    }
+
+    public static TByte valueOf(byte value) {
+        return new TByte(value);
+    }
+
+    public static TString toString(byte value) {
+        return TString.wrap(new StringBuilder().append(value).toString());
+    }
+
+    @Override
+    @Rename("toString")
+    public TString toString0() {
+        return toString(value);
+    }
+
+    @Override
+    public boolean equals(TObject other) {
+        return other instanceof TByte && ((TByte)other).value == value;
+    }
+
+    @Override
+    public int hashCode() {
+        return value;
+    }
+
+    public static int compare(byte a, byte b) {
+        return a - b;
+    }
+
+    @Override
+    public int compareTo(TByte other) {
+        return compare(value, other.value);
+    }
+}
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TCharacter.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TCharacter.java
index 50630cbc1..b1d0761da 100644
--- a/teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TCharacter.java
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TCharacter.java
@@ -15,6 +15,7 @@
  */
 package org.teavm.classlib.java.lang;
 
+import org.teavm.classlib.impl.charset.UTF16Helper;
 import org.teavm.classlib.impl.unicode.UnicodeHelper;
 import org.teavm.dependency.PluggableDependency;
 import org.teavm.javascript.ni.GeneratedBy;
@@ -109,4 +110,23 @@ public class TCharacter extends TObject {
     @GeneratedBy(CharacterNativeGenerator.class)
     @PluggableDependency(CharacterNativeGenerator.class)
     private static native String obtainDigitMapping();
+
+    public static int toChars(int codePoint, char[] dst, int dstIndex) {
+        if (codePoint >= UTF16Helper.SUPPLEMENTARY_PLANE) {
+            dst[dstIndex] = UTF16Helper.highSurrogate(codePoint);
+            dst[dstIndex + 1] = UTF16Helper.lowSurrogate(codePoint);
+            return 2;
+        } else {
+            dst[dstIndex] = (char)codePoint;
+            return 1;
+        }
+    }
+
+    public static char[] toChars(int codePoint) {
+        if (codePoint >= UTF16Helper.SUPPLEMENTARY_PLANE) {
+            return new char[] { UTF16Helper.highSurrogate(codePoint), UTF16Helper.lowSurrogate(codePoint) };
+        } else {
+            return new char[] { (char)codePoint };
+        }
+    }
 }
diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TShort.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TShort.java
new file mode 100644
index 000000000..b174c135b
--- /dev/null
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TShort.java
@@ -0,0 +1,88 @@
+/*
+ *  Copyright 2014 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.lang;
+
+import org.teavm.javascript.ni.Rename;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class TShort extends TNumber implements TComparable<TShort> {
+    private short value;
+
+    public TShort(short value) {
+        this.value = value;
+    }
+
+    @Override
+    public int intValue() {
+        return value;
+    }
+
+    @Override
+    public long longValue() {
+        return value;
+    }
+
+    @Override
+    public float floatValue() {
+        return value;
+    }
+
+    @Override
+    public double doubleValue() {
+        return value;
+    }
+
+    @Override
+    public short shortValue() {
+        return value;
+    }
+
+    public static TShort valueOf(short value) {
+        return new TShort(value);
+    }
+
+    public static TString toString(short value) {
+        return TString.wrap(new StringBuilder().append(value).toString());
+    }
+
+    @Override
+    @Rename("toString")
+    public TString toString0() {
+        return toString(value);
+    }
+
+    @Override
+    public boolean equals(TObject other) {
+        return other instanceof TShort && ((TShort)other).value == value;
+    }
+
+    @Override
+    public int hashCode() {
+        return value;
+    }
+
+    public static int compare(short a, short b) {
+        return a - b;
+    }
+
+    @Override
+    public int compareTo(TShort other) {
+        return compare(value, other.value);
+    }
+}
diff --git a/teavm-classlib/src/test/java/org/teavm/classlib/java/io/BufferedReaderTest.java b/teavm-classlib/src/test/java/org/teavm/classlib/java/io/BufferedReaderTest.java
new file mode 100644
index 000000000..8787b706b
--- /dev/null
+++ b/teavm-classlib/src/test/java/org/teavm/classlib/java/io/BufferedReaderTest.java
@@ -0,0 +1,98 @@
+/*
+ *  Copyright 2014 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.io;
+
+import static org.junit.Assert.*;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.StringReader;
+import org.junit.Test;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class BufferedReaderTest {
+    @Test
+    public void readsCharacters() throws IOException {
+        String str = "foo bar baz";
+        BufferedReader reader = new BufferedReader(new StringReader(str));
+        char[] chars = new char[100];
+        int charsRead = reader.read(chars);
+        assertEquals(str.length(), charsRead);
+        assertEquals(str.charAt(0), chars[0]);
+        assertEquals(str.charAt(charsRead - 1), chars[charsRead - 1]);
+        assertEquals(0, chars[charsRead]);
+    }
+
+    @Test
+    public void readsCharactersOneByOne() throws IOException {
+        String str = "foo";
+        BufferedReader reader = new BufferedReader(new StringReader(str));
+        assertEquals('f', reader.read());
+        assertEquals('o', reader.read());
+        assertEquals('o', reader.read());
+        assertEquals(-1, reader.read());
+        assertEquals(-1, reader.read());
+    }
+
+    @Test
+    public void readsLine() throws IOException {
+        String str = "foo\nbar\rbaz\r\nA\n\nB";
+        BufferedReader reader = new BufferedReader(new StringReader(str));
+        assertEquals("foo", reader.readLine());
+        assertEquals("bar", reader.readLine());
+        assertEquals("baz", reader.readLine());
+        assertEquals("A", reader.readLine());
+        assertEquals("", reader.readLine());
+        assertEquals("B", reader.readLine());
+        assertNull(reader.readLine());
+        assertNull(reader.readLine());
+    }
+
+    @Test
+    public void fillsBuffer() throws IOException {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < 1000; ++i) {
+            sb.append((char)i);
+        }
+        BufferedReader reader = new BufferedReader(new StringReader(sb.toString()), 101);
+        char[] buffer = new char[500];
+        reader.read(buffer);
+        assertEquals(0, buffer[0]);
+        assertEquals(1, buffer[1]);
+        assertEquals(499, buffer[499]);
+    }
+
+    @Test
+    public void leavesMark() throws IOException {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < 1000; ++i) {
+            sb.append((char)i);
+        }
+        BufferedReader reader = new BufferedReader(new StringReader(sb.toString()), 100);
+        reader.skip(50);
+        reader.mark(70);
+        reader.skip(60);
+        reader.reset();
+        char[] buffer = new char[150];
+        int charsRead = reader.read(buffer);
+        assertEquals(150, charsRead);
+        assertEquals(50, buffer[0]);
+        assertEquals(51, buffer[1]);
+        assertEquals(199, buffer[149]);
+    }
+}
diff --git a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/io/InputStreamReaderTest.java b/teavm-classlib/src/test/java/org/teavm/classlib/java/io/InputStreamReaderTest.java
similarity index 98%
rename from teavm-classlib/src/test/java/org/teavm/classlib/java/lang/io/InputStreamReaderTest.java
rename to teavm-classlib/src/test/java/org/teavm/classlib/java/io/InputStreamReaderTest.java
index 344b6a941..d53595919 100644
--- a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/io/InputStreamReaderTest.java
+++ b/teavm-classlib/src/test/java/org/teavm/classlib/java/io/InputStreamReaderTest.java
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.classlib.java.lang.io;
+package org.teavm.classlib.java.io;
 
 import static org.junit.Assert.*;
 import java.io.ByteArrayInputStream;
diff --git a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/ArrayListTest.java b/teavm-classlib/src/test/java/org/teavm/classlib/java/util/ArrayListTest.java
similarity index 98%
rename from teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/ArrayListTest.java
rename to teavm-classlib/src/test/java/org/teavm/classlib/java/util/ArrayListTest.java
index ac15aaaee..5410fef9b 100644
--- a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/ArrayListTest.java
+++ b/teavm-classlib/src/test/java/org/teavm/classlib/java/util/ArrayListTest.java
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.classlib.java.lang.util;
+package org.teavm.classlib.java.util;
 
 import static org.junit.Assert.*;
 import java.util.ArrayList;
diff --git a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/ArraysTest.java b/teavm-classlib/src/test/java/org/teavm/classlib/java/util/ArraysTest.java
similarity index 97%
rename from teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/ArraysTest.java
rename to teavm-classlib/src/test/java/org/teavm/classlib/java/util/ArraysTest.java
index 2fb4597dc..773178c47 100644
--- a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/ArraysTest.java
+++ b/teavm-classlib/src/test/java/org/teavm/classlib/java/util/ArraysTest.java
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.classlib.java.lang.util;
+package org.teavm.classlib.java.util;
 
 import static org.junit.Assert.*;
 import java.util.Arrays;
diff --git a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/CollectionsTest.java b/teavm-classlib/src/test/java/org/teavm/classlib/java/util/CollectionsTest.java
similarity index 97%
rename from teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/CollectionsTest.java
rename to teavm-classlib/src/test/java/org/teavm/classlib/java/util/CollectionsTest.java
index b873997ec..035628771 100644
--- a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/CollectionsTest.java
+++ b/teavm-classlib/src/test/java/org/teavm/classlib/java/util/CollectionsTest.java
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.classlib.java.lang.util;
+package org.teavm.classlib.java.util;
 
 import static org.junit.Assert.assertEquals;
 import java.util.ArrayList;
diff --git a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/ServiceLoaderTest.java b/teavm-classlib/src/test/java/org/teavm/classlib/java/util/ServiceLoaderTest.java
similarity index 96%
rename from teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/ServiceLoaderTest.java
rename to teavm-classlib/src/test/java/org/teavm/classlib/java/util/ServiceLoaderTest.java
index 9093fdc88..13ca0bb1d 100644
--- a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/ServiceLoaderTest.java
+++ b/teavm-classlib/src/test/java/org/teavm/classlib/java/util/ServiceLoaderTest.java
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.classlib.java.lang.util;
+package org.teavm.classlib.java.util;
 
 import static org.junit.Assert.*;
 import java.util.ServiceLoader;
diff --git a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/TestService.java b/teavm-classlib/src/test/java/org/teavm/classlib/java/util/TestService.java
similarity index 94%
rename from teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/TestService.java
rename to teavm-classlib/src/test/java/org/teavm/classlib/java/util/TestService.java
index 540f9787f..dcd4d7ed7 100644
--- a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/TestService.java
+++ b/teavm-classlib/src/test/java/org/teavm/classlib/java/util/TestService.java
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.classlib.java.lang.util;
+package org.teavm.classlib.java.util;
 
 /**
  *
diff --git a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/TestServiceImpl.java b/teavm-classlib/src/test/java/org/teavm/classlib/java/util/TestServiceImpl.java
similarity index 95%
rename from teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/TestServiceImpl.java
rename to teavm-classlib/src/test/java/org/teavm/classlib/java/util/TestServiceImpl.java
index 1e3a05ceb..c5ff7a3de 100644
--- a/teavm-classlib/src/test/java/org/teavm/classlib/java/lang/util/TestServiceImpl.java
+++ b/teavm-classlib/src/test/java/org/teavm/classlib/java/util/TestServiceImpl.java
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.classlib.java.lang.util;
+package org.teavm.classlib.java.util;
 
 /**
  *
diff --git a/teavm-classlib/src/test/resources/META-INF/services/org.teavm.classlib.java.lang.util.TestService b/teavm-classlib/src/test/resources/META-INF/services/org.teavm.classlib.java.lang.util.TestService
deleted file mode 100644
index 277015e69..000000000
--- a/teavm-classlib/src/test/resources/META-INF/services/org.teavm.classlib.java.lang.util.TestService
+++ /dev/null
@@ -1 +0,0 @@
-org.teavm.classlib.java.lang.util.TestServiceImpl
\ No newline at end of file
diff --git a/teavm-classlib/src/test/resources/META-INF/services/org.teavm.classlib.java.util.TestService b/teavm-classlib/src/test/resources/META-INF/services/org.teavm.classlib.java.util.TestService
new file mode 100644
index 000000000..ab8162f22
--- /dev/null
+++ b/teavm-classlib/src/test/resources/META-INF/services/org.teavm.classlib.java.util.TestService
@@ -0,0 +1 @@
+org.teavm.classlib.java.util.TestServiceImpl
\ No newline at end of file
diff --git a/teavm-core/src/main/java/org/teavm/dependency/DependencyGraphBuilder.java b/teavm-core/src/main/java/org/teavm/dependency/DependencyGraphBuilder.java
index 423ba478d..2c72e65e6 100644
--- a/teavm-core/src/main/java/org/teavm/dependency/DependencyGraphBuilder.java
+++ b/teavm-core/src/main/java/org/teavm/dependency/DependencyGraphBuilder.java
@@ -411,7 +411,15 @@ class DependencyGraphBuilder {
         }
 
         @Override
-        public void isInstance(VariableReader receiver, VariableReader value, ValueType type) {
+        public void isInstance(VariableReader receiver, VariableReader value, final ValueType type) {
+            if (type instanceof ValueType.Object) {
+                final String className = ((ValueType.Object)type).getClassName();
+                useRunners.add(new Runnable() {
+                    @Override public void run() {
+                        dependencyChecker.initClass(className, callerStack);
+                    }
+                });
+            }
         }
 
         @Override