diff --git a/classpath/java/io/EOFException.java b/classpath/java/io/EOFException.java
new file mode 100644
index 0000000000..831c38c47c
--- /dev/null
+++ b/classpath/java/io/EOFException.java
@@ -0,0 +1,11 @@
+package java.io;
+
+public class EOFException extends IOException {
+  public EOFException(String message) {
+    super(message);
+  }
+
+  public EOFException() {
+    this(null);
+  }
+}
diff --git a/classpath/java/io/NotSerializableException.java b/classpath/java/io/NotSerializableException.java
new file mode 100644
index 0000000000..67cd75160d
--- /dev/null
+++ b/classpath/java/io/NotSerializableException.java
@@ -0,0 +1,11 @@
+package java.io;
+
+public class NotSerializableException extends ObjectStreamException {
+  public NotSerializableException(String message) {
+    super(message);
+  }
+
+  public NotSerializableException() {
+    this(null);
+  }
+}
diff --git a/classpath/java/io/ObjectInputStream.java b/classpath/java/io/ObjectInputStream.java
index d12fcd127a..531058b943 100644
--- a/classpath/java/io/ObjectInputStream.java
+++ b/classpath/java/io/ObjectInputStream.java
@@ -1,8 +1,13 @@
 package java.io;
 
+import java.util.HashMap;
+import java.lang.reflect.Array;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
 public class ObjectInputStream extends InputStream {
   private final InputStream in;
-  private final Reader r;
+  private final PushbackReader r;
 
   public ObjectInputStream(InputStream in) {
     this.in = in;
@@ -21,7 +26,7 @@ public class ObjectInputStream extends InputStream {
     in.close();
   }
 
-  public Object readObject() throws IOException {
+  public Object readObject() throws IOException, ClassNotFoundException {
     return readObject(new HashMap());
   }
 
@@ -67,7 +72,7 @@ public class ObjectInputStream extends InputStream {
 
   private void skipSpace() throws IOException {
     int c;
-    while ((c = r.read()) != -1 && Character.isSpace((char) c));
+    while ((c = r.read()) != -1 && Character.isWhitespace((char) c));
     if (c != -1) {
       r.unread(c);
     }
@@ -91,7 +96,7 @@ public class ObjectInputStream extends InputStream {
 
     StringBuilder sb = new StringBuilder();
     int c;
-    while ((c = r.read()) != -1 && ! Character.isSpace((char) c)) {
+    while ((c = r.read()) != -1 && ! Character.isWhitespace((char) c)) {
       sb.append((char) c);
     }
     if (c != -1) {
@@ -108,13 +113,15 @@ public class ObjectInputStream extends InputStream {
     return Double.parseDouble(readStringToken());
   }
 
-  private Object readObject(HashMap<Integer, Object> map) throws IOException {
+  private Object readObject(HashMap<Integer, Object> map)
+    throws IOException, ClassNotFoundException
+  {
     skipSpace();
     switch (r.read()) {
     case 'a':
       return deserializeArray(map);
     case 'l':
-      return deserialize(map);
+      return deserializeObject(map);
     case 'n':
       return null;
     case -1:
@@ -124,153 +131,85 @@ public class ObjectInputStream extends InputStream {
     }
   }
 
+  private Object deserialize(HashMap<Integer, Object> map)
+    throws IOException, ClassNotFoundException
+  {
+    skipSpace(); 
+
+    switch (r.read()) {
+    case 'a':
+      return deserializeArray(map);
+    case 'l':
+      return deserializeObject(map);
+    case 'r':
+      return map.get((int) readLongToken());
+    case 'n':
+      return null;
+    case 'z':
+      return (readLongToken() == 0);
+    case 'b':
+      return (byte) readLongToken();
+    case 'c':
+      return (char) readLongToken();
+    case 's':
+      return (short) readLongToken();
+    case 'i':
+      return (int) readLongToken();
+    case 'j':
+      return readLongToken();
+    case 'f':
+      return (float) readDoubleToken();
+    case 'd':
+      return readDoubleToken();
+    case -1:
+      throw new EOFException();
+    default:
+      throw new StreamCorruptedException();
+    }
+  }
+
   private Object deserializeArray(HashMap<Integer, Object> map)
-    throws IOException
+    throws IOException, ClassNotFoundException
   {
     read('(');
     int id = (int) readLongToken();
     Class c = Class.forName(readStringToken());
     int length = (int) readLongToken();
-    Object o = Array.newInstance(c.getComponentType(), length);
+    Class t = c.getComponentType();
+    Object o = Array.newInstance(t, length);
 
     map.put(id, o);
   
     for (int i = 0; i < length; ++i) {
-      skipSpace();
-    
-      switch (r.read()) {
-      case 'a':
-        Array.set(o, i, deserializeArray(map));
-        break;
-
-      case 'l':
-        Array.set(o, i, deserialize(map));
-        break;
-
-      case 'r':
-        Array.set(o, i, map.get((int) readLongToken()));
-        break;
-
-      case 'n':
-        Array.set(o, i, null);
-        break;
-
-      case 'z':
-        f.setBoolean(o, readLongToken() != 0);
-        break;
-
-      case 'b':
-        f.setByte(o, (byte) readLongToken());
-        break;
-
-      case 'c':
-        f.setChar(o, (char) readLongToken());
-        break;
-
-      case 's':
-        f.setShort(o, (short) readLongToken());
-        break;
-
-      case 'i':
-        f.setInt(o, (int) readLongToken());
-        break;
-
-      case 'j':
-        f.setLong(o, readLongToken());
-        break;
-
-      case 'f':
-        f.setFloat(o, (float) readDoubleToken());
-        break;
-
-      case 'd':
-        f.setDouble(o, readDoubleToken());
-        break;
-
-      case -1:
-        throw new EOFException();
-
-      default:
-        throw new StreamCorruptedException();
-      }
+      Array.set(o, i, deserialize(map));
     }
 
     read(')');
+
+    return o;
   }
 
-  private Object deserialize(HashMap<Integer, Object> map)
-    throws IOException
+  private static native Object makeInstance(Class c);
+
+  private Object deserializeObject(HashMap<Integer, Object> map)
+    throws IOException, ClassNotFoundException
   {
     read('(');
     int id = (int) readLongToken();
     Class c = Class.forName(readStringToken());
-    Object o = c.newInstance();
+    Object o = makeInstance(c);
 
     map.put(id, o);
   
     for (Field f: c.getFields()) {
       int modifiers = f.getModifiers();
       if ((modifiers & (Modifier.TRANSIENT | Modifier.STATIC)) == 0) {
-        skipSpace();
-    
-        switch (r.read()) {
-        case 'a':
-          Array.set(o, i, deserializeArray(map));
-          break;
-
-        case 'l':
-          Array.set(o, i, deserialize(map));
-          break;
-
-        case 'r':
-          Array.set(o, i, map.get((int) readLongToken()));
-          break;
-
-        case 'n':
-          Array.set(o, i, null);
-          break;
-
-        case 'z':
-          Array.setBoolean(o, i, readLongToken() != 0);
-          break;
-
-        case 'b':
-          Array.setByte(o, i, (byte) readLongToken());
-          break;
-
-        case 'c':
-          Array.setChar(o, i, (char) readLongToken());
-          break;
-
-        case 's':
-          Array.setShort(o, i, (short) readLongToken());
-          break;
-
-        case 'i':
-          Array.setInt(o, i, (int) readLongToken());
-          break;
-
-        case 'j':
-          Array.setLong(o, i, readLongToken());
-          break;
-
-        case 'f':
-          Array.setFloat(o, i, (float) readDoubleToken());
-          break;
-
-        case 'd':
-          Array.setDouble(o, i, readDoubleToken());
-          break;
-
-        case -1:
-          throw new EOFException();
-
-        default:
-          throw new StreamCorruptedException();
-        }
+        f.set(o, deserialize(map));
       }
     }
 
     read(')');
+
+    return o;
   }
 }
diff --git a/classpath/java/io/ObjectOutputStream.java b/classpath/java/io/ObjectOutputStream.java
index a771b8e000..25b20adeae 100644
--- a/classpath/java/io/ObjectOutputStream.java
+++ b/classpath/java/io/ObjectOutputStream.java
@@ -1,6 +1,9 @@
 package java.io;
 
 import java.util.IdentityHashMap;
+import java.lang.reflect.Array;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
 
 public class ObjectOutputStream extends OutputStream {
   private final PrintStream out;
@@ -76,15 +79,15 @@ public class ObjectOutputStream extends OutputStream {
     if (o == null) {
       out.print("n");
     } else {
-      Integer id = map.get(new Identity(o));
+      Integer id = map.get(o);
       if (id == null) {
-        map.put(new Identity(o), nextId);
+        map.put(o, nextId);
 
         Class c = o.getClass();
         if (c.isArray()) {
           serializeArray(o, map, nextId);
         } else if (Serializable.class.isAssignableFrom(c)) {
-          serialize(o, map, nextId);
+          serializeObject(o, map, nextId);
         } else {
           throw new NotSerializableException(c.getName());
         }
@@ -112,32 +115,33 @@ public class ObjectOutputStream extends OutputStream {
 
     for (int i = 0; i < length; ++i) {
       out.print(" ");
+      Object v = Array.get(o, i);
       if (t.equals(boolean.class)) {
-        writeBoolean(Array.getBoolean(o));
+        writeBoolean((Boolean) v);
       } else if (t.equals(byte.class)) {
-        writeByte(Array.getByte(o));
+        writeByte((Byte) v);
       } else if (t.equals(char.class)) {
-        writeChar(Array.getChar(o));
+        writeChar((Character) v);
       } else if (t.equals(short.class)) {
-        writeShort(Array.getShort(o));
+        writeShort((Short) v);
       } else if (t.equals(int.class)) {
-        writeInt(Array.getInt(o));
+        writeInt((Integer) v);
       } else if (t.equals(long.class)) {
-        writeLong(Array.getLong(o));
+        writeLong((Long) v);
       } else if (t.equals(float.class)) {
-        writeFloat(Array.getFloat(o));
+        writeFloat((Float) v);
       } else if (t.equals(double.class)) {
-        writeDouble(Array.getDouble(o));
+        writeDouble((Double) v);
       } else {
-        writeObject(Array.get(o), map, nextId);
+        writeObject(v, map, nextId);
       }
     }
 
     out.print(")");
   }
   
-  private void serialize(Object o, IdentityHashMap<Object, Integer> map,
-                         int nextId)
+  private void serializeObject(Object o, IdentityHashMap<Object, Integer> map,
+                               int nextId)
     throws IOException
   {
     Class c = o.getClass();
@@ -151,25 +155,26 @@ public class ObjectOutputStream extends OutputStream {
       int modifiers = f.getModifiers();
       if ((modifiers & (Modifier.TRANSIENT | Modifier.STATIC)) == 0) {
         out.print(" ");
+        Object v = f.get(o);
         Class t = f.getType();
         if (t.equals(boolean.class)) {
-          writeBoolean(f.getBoolean(o));
+          writeBoolean((Boolean) v);
         } else if (t.equals(byte.class)) {
-          writeByte(f.getByte(o));
+          writeByte((Byte) v);
         } else if (t.equals(char.class)) {
-          writeChar(f.getChar(o));
+          writeChar((Character) v);
         } else if (t.equals(short.class)) {
-          writeShort(f.getShort(o));
+          writeShort((Short) v);
         } else if (t.equals(int.class)) {
-          writeInt(f.getInt(o));
+          writeInt((Integer) v);
         } else if (t.equals(long.class)) {
-          writeLong(f.getLong(o));
+          writeLong((Long) v);
         } else if (t.equals(float.class)) {
-          writeFloat(f.getFloat(o));
+          writeFloat((Float) v);
         } else if (t.equals(double.class)) {
-          writeDouble(f.getDouble(o));
+          writeDouble((Double) v);
         } else {
-          writeObject(f.get(o), map, nextId);
+          writeObject(v, map, nextId);
         }
       }
     }
diff --git a/classpath/java/io/PushbackReader.java b/classpath/java/io/PushbackReader.java
new file mode 100644
index 0000000000..1df36fbc80
--- /dev/null
+++ b/classpath/java/io/PushbackReader.java
@@ -0,0 +1,69 @@
+package java.io;
+
+public class PushbackReader extends Reader {
+  private final Reader in;
+  private final char[] buffer;
+  private int position;
+  private int limit;
+
+  public PushbackReader(Reader in, int bufferSize) {
+    this.in = in;
+    this.buffer = new char[bufferSize];
+  }
+
+  public PushbackReader(Reader in) {
+    this(in, 1);
+  }
+
+  public int read(char[] b, int offset, int length) throws IOException {
+    int count = 0;
+
+    if (position < limit) {
+      int remaining = limit - position;
+      if (remaining > length) {
+        remaining = length;
+      }
+
+      System.arraycopy(buffer, position, b, offset, remaining);
+
+      count += remaining;
+      position += remaining;
+      offset += remaining;
+      length -= remaining;
+    }
+
+    if (length > 0) {
+      int c = in.read(b, offset, length);
+      if (c == -1) {
+        if (count == 0) {
+          count = -1;
+        }
+      } else {
+        count += c;
+      }
+    }
+
+    return count;
+  }
+
+  public void unread(char[] b, int offset, int length) throws IOException {
+    if (position < length) {
+      throw new IOException(length + " not in [0," + position + "]");
+    } else {
+      System.arraycopy(buffer, position - length, b, offset, length);
+      position -= length;
+    }
+  }
+
+  public void unread(char[] b) throws IOException {
+    unread(b, 0, b.length);
+  }
+
+  public void unread(int c) throws IOException {
+    unread(new char[] { (char) c });
+  }
+
+  public void close() throws IOException {
+    in.close();
+  }
+}
diff --git a/classpath/java/io/StreamCorruptedException.java b/classpath/java/io/StreamCorruptedException.java
new file mode 100644
index 0000000000..2ebb87daf1
--- /dev/null
+++ b/classpath/java/io/StreamCorruptedException.java
@@ -0,0 +1,11 @@
+package java.io;
+
+public class StreamCorruptedException extends IOException {
+  public StreamCorruptedException(String message) {
+    super(message);
+  }
+
+  public StreamCorruptedException() {
+    this(null);
+  }
+}
diff --git a/classpath/java/lang/Boolean.java b/classpath/java/lang/Boolean.java
index 86dcf05b2d..5d68dcf8ed 100644
--- a/classpath/java/lang/Boolean.java
+++ b/classpath/java/lang/Boolean.java
@@ -12,6 +12,10 @@ public final class Boolean {
     this.value = value;
   }
 
+  public static Boolean valueOf(boolean value) {
+    return (value ? Boolean.TRUE : Boolean.FALSE);
+  }
+
   public boolean equals(Object o) {
     return o instanceof Boolean && ((Boolean) o).value == value;
   }
diff --git a/classpath/java/lang/Byte.java b/classpath/java/lang/Byte.java
index c87f24dca0..3007906695 100644
--- a/classpath/java/lang/Byte.java
+++ b/classpath/java/lang/Byte.java
@@ -9,6 +9,10 @@ public final class Byte extends Number {
     this.value = value;
   }
 
+  public static Byte valueOf(byte value) {
+    return new Byte(value);
+  }
+
   public boolean equals(Object o) {
     return o instanceof Byte && ((Byte) o).value == value;
   }
diff --git a/classpath/java/lang/Character.java b/classpath/java/lang/Character.java
index aaa7713f0c..765f005042 100644
--- a/classpath/java/lang/Character.java
+++ b/classpath/java/lang/Character.java
@@ -9,6 +9,10 @@ public final class Character {
     this.value = value;
   }
 
+  public static Character valueOf(char value) {
+    return new Character(value);
+  }
+
   public boolean equals(Object o) {
     return o instanceof Character && ((Character) o).value == value;
   }
diff --git a/classpath/java/lang/Class.java b/classpath/java/lang/Class.java
index 6516e5a538..da3ce0bf9f 100644
--- a/classpath/java/lang/Class.java
+++ b/classpath/java/lang/Class.java
@@ -47,7 +47,7 @@ public final class Class <T> {
 
   private native void initialize();
   
-  static Class forCanonicalName(String name) {
+  public static Class forCanonicalName(String name) {
     try {
       if (name.startsWith("[")) {
         return forName(name);
@@ -65,6 +65,14 @@ public final class Class <T> {
     }
   }
 
+  public Class getComponentType() {
+    if (isArray()) {
+      return forCanonicalName(new String(name, 1, name.length - 2, false));
+    } else {
+      return null;
+    }
+  }
+
   public native boolean isAssignableFrom(Class c);
 
   private Field findField(String name) {
diff --git a/classpath/java/lang/Double.java b/classpath/java/lang/Double.java
index 6073fce540..89d681ac29 100644
--- a/classpath/java/lang/Double.java
+++ b/classpath/java/lang/Double.java
@@ -13,6 +13,10 @@ public final class Double extends Number {
     this.value = value;
   }
 
+  public static Double valueOf(double value) {
+    return new Double(value);
+  }
+
   public boolean equals(Object o) {
     return o instanceof Double && ((Double) o).value == value;
   }
diff --git a/classpath/java/lang/Float.java b/classpath/java/lang/Float.java
index 769d7e6266..5bbad02ad3 100644
--- a/classpath/java/lang/Float.java
+++ b/classpath/java/lang/Float.java
@@ -9,6 +9,10 @@ public final class Float extends Number {
     this.value = value;
   }
 
+  public static Float valueOf(float value) {
+    return new Float(value);
+  }
+
   public boolean equals(Object o) {
     return o instanceof Float && ((Float) o).value == value;
   }
diff --git a/classpath/java/lang/Integer.java b/classpath/java/lang/Integer.java
index d22777dcd1..8c2f7e030d 100644
--- a/classpath/java/lang/Integer.java
+++ b/classpath/java/lang/Integer.java
@@ -12,6 +12,10 @@ public final class Integer extends Number {
     this.value = value;
   }
 
+  public static Integer valueOf(int value) {
+    return new Integer(value);
+  }
+
   public boolean equals(Object o) {
     return o instanceof Integer && ((Integer) o).value == value;
   }
diff --git a/classpath/java/lang/Long.java b/classpath/java/lang/Long.java
index 0238d08d16..b289726e1e 100644
--- a/classpath/java/lang/Long.java
+++ b/classpath/java/lang/Long.java
@@ -9,6 +9,10 @@ public final class Long extends Number {
     this.value = value;
   }
 
+  public static Long valueOf(long value) {
+    return new Long(value);
+  }
+
   public boolean equals(Object o) {
     return o instanceof Long && ((Long) o).value == value;
   }
diff --git a/classpath/java/lang/Short.java b/classpath/java/lang/Short.java
index 5049a0f509..4b014cc207 100644
--- a/classpath/java/lang/Short.java
+++ b/classpath/java/lang/Short.java
@@ -9,6 +9,10 @@ public final class Short extends Number {
     this.value = value;
   }
 
+  public static Short valueOf(short value) {
+    return new Short(value);
+  }
+
   public boolean equals(Object o) {
     return o instanceof Short && ((Short) o).value == value;
   }
diff --git a/classpath/java/lang/System.java b/classpath/java/lang/System.java
index e786e6ac80..0afee7fd5e 100644
--- a/classpath/java/lang/System.java
+++ b/classpath/java/lang/System.java
@@ -29,6 +29,8 @@ public abstract class System {
 
   public static native long currentTimeMillis();
 
+  public static native int identityHashCode(Object o);
+
   public static void loadLibrary(String name) {
     Runtime.getRuntime().loadLibrary(name);
   }
diff --git a/classpath/java/lang/reflect/Field.java b/classpath/java/lang/reflect/Field.java
index e1097ab548..43da614cb9 100644
--- a/classpath/java/lang/reflect/Field.java
+++ b/classpath/java/lang/reflect/Field.java
@@ -31,6 +31,10 @@ public class Field<T> extends AccessibleObject {
     return new String(name, 0, name.length - 1, false);
   }
 
+  public Class getType() {
+    return Class.forCanonicalName(getName());
+  }
+
   public native Object get(Object instance);
 
   public native void set(Object instance, Object value);
diff --git a/classpath/java/util/HashMap.java b/classpath/java/util/HashMap.java
index 8c859da55e..676507391c 100644
--- a/classpath/java/util/HashMap.java
+++ b/classpath/java/util/HashMap.java
@@ -64,9 +64,9 @@ public class HashMap<K, V> implements Map<K, V> {
 
   private Cell<K, V> find(K key) {
     if (array != null) {
-      int index = hash(key) & (array.length - 1);
+      int index = helper.hash(key) & (array.length - 1);
       for (Cell<K, V> c = array[index]; c != null; c = c.next()) {
-        if (equal(key, c.getKey())) {
+        if (helper.equal(key, c.getKey())) {
           return c;
         }
       }
@@ -131,10 +131,10 @@ public class HashMap<K, V> implements Map<K, V> {
   public Cell<K, V> removeCell(K key) {
     Cell<K, V> old = null;
     if (array != null) {
-      int index = hash(key) & (array.length - 1);
+      int index = helper.hash(key) & (array.length - 1);
       Cell<K, V> p = null;
       for (Cell<K, V> c = array[index]; c != null; c = c.next()) {
-        if (equal(key, c.getKey())) {
+        if (helper.equal(key, c.getKey())) {
           old = c;
           if (p == null) {
             array[index] = c.next();
@@ -196,15 +196,17 @@ public class HashMap<K, V> implements Map<K, V> {
     public boolean equal(K a, K b);
   }
 
-  private class MyCell<K, V> implements Cell<K, V> {
+  private static class MyCell<K, V> implements Cell<K, V> {
     public final K key;
     public V value;
     public Cell<K, V> next;
+    public int hashCode;
 
-    public MyCell(K key, V value, Cell<K, V> next) {
+    public MyCell(K key, V value, Cell<K, V> next, int hashCode) {
       this.key = key;
       this.value = value;
       this.next = next;
+      this.hashCode = hashCode;
     }
 
     public K getKey() {
@@ -228,13 +230,13 @@ public class HashMap<K, V> implements Map<K, V> {
     }
 
     public int hashCode() {
-      return helper.hash(key);
+      return hashCode;
     }
   }
 
   static class MyHelper<K, V> implements Helper<K, V> {
     public Cell<K, V> make(K key, V value, Cell<K, V> next) {
-      return new MyCell(key, value, next);
+      return new MyCell(key, value, next, hash(key));
     }
 
     public int hash(K a) {
diff --git a/classpath/java/util/WeakHashMap.java b/classpath/java/util/WeakHashMap.java
index 5fb18bf615..22edc2c311 100644
--- a/classpath/java/util/WeakHashMap.java
+++ b/classpath/java/util/WeakHashMap.java
@@ -79,11 +79,11 @@ public class WeakHashMap<K, V> implements Map<K, V> {
     public HashMap.Cell<K, V> next;
     public int hashCode;
 
-    public MyCell(K key, V value, HashMap.Cell<K, V> next) {
+    public MyCell(K key, V value, HashMap.Cell<K, V> next, int hashCode) {
       super(key);
       this.value = value;
       this.next = next;
-      this.hashCode = (key == null ? 0 : key.hashCode());
+      this.hashCode = hashCode;
     }
 
     public K getKey() {
@@ -115,7 +115,7 @@ public class WeakHashMap<K, V> implements Map<K, V> {
     extends HashMap.MyHelper<K, V>
   {
     public HashMap.Cell<K, V> make(K key, V value, HashMap.Cell<K, V> next) {
-      return new MyCell(key, value, next);
+      return new MyCell(key, value, next, hash(key));
     }
   }
 }
diff --git a/makefile b/makefile
index be2562f2fb..2850aef4fa 100644
--- a/makefile
+++ b/makefile
@@ -16,7 +16,7 @@ src = src
 classpath = classpath
 test = test
 
-input = $(cls)/Reflection.class
+input = $(cls)/References.class
 
 cxx = g++
 cc = gcc
diff --git a/src/builtin.cpp b/src/builtin.cpp
index 3dd77fff30..1d63e19240 100644
--- a/src/builtin.cpp
+++ b/src/builtin.cpp
@@ -49,13 +49,19 @@ Object_wait(Thread* t, jobject this_, jlong milliseconds)
 void
 Object_notify(Thread* t, jobject this_)
 {
-  vm::notify(t, *this_);
+  notify(t, *this_);
 }
 
 void
 Object_notifyAll(Thread* t, jobject this_)
 {
-  vm::notifyAll(t, *this_);
+  notifyAll(t, *this_);
+}
+
+jint
+Object_hashCode(Thread* t, jobject this_)
+{
+  return objectHash(t, *this_);
 }
 
 jclass
@@ -119,6 +125,12 @@ SystemClassLoader_resourceExists(Thread* t, jclass, jstring name)
   }
 }
 
+jobject
+ObjectInputStream_makeInstance(Thread* t, jclass, jclass c)
+{
+  return pushReference(t, make(t, *c));
+}
+
 jclass
 Class_primitiveClass(Thread* t, jclass, jchar name)
 {
@@ -547,6 +559,17 @@ System_arraycopy(Thread* t, jclass, jobject src, jint srcOffset, jobject dst,
   t->exception = makeArrayStoreException(t);
 }
 
+jint
+System_identityHashCode(Thread* t, jclass, jobject o)
+{
+  if (LIKELY(o)) {
+    return objectHash(t, *o);
+  } else {
+    t->exception = makeNullPointerException(t);
+    return 0;
+  }
+}
+
 void
 Runtime_loadLibrary(Thread* t, jobject, jstring name)
 {
@@ -791,6 +814,8 @@ populateBuiltinMap(Thread* t, object map)
       reinterpret_cast<void*>(::Object_toString) },
     { "Java_java_lang_Object_wait",
       reinterpret_cast<void*>(::Object_wait) },
+    { "Java_java_lang_Object_hashCode",
+      reinterpret_cast<void*>(::Object_hashCode) },
 
     { "Java_java_lang_reflect_Array_get",
       reinterpret_cast<void*>(::Array_get) },
@@ -823,6 +848,9 @@ populateBuiltinMap(Thread* t, object map)
     { "Java_java_net_URL_00024ResourceInputStream_close",
       reinterpret_cast<void*>(::ResourceInputStream_close) },
 
+    { "Java_java_io_ObjectInputStream_makeInstance",
+      reinterpret_cast<void*>(::ObjectInputStream_makeInstance) },
+
     { 0, 0 }
   };