various bugfixes

classpath/java/lang/Object.java

@@ -1,7 +1,7 @@
 package java.lang;
 
 public class Object {
-  protected native Object clone();
+  protected native Object clone() throws CloneNotSupportedException;
 
   public boolean equals(Object o) {
     return this == o;

classpath/java/lang/reflect/Constructor.java

@@ -38,7 +38,10 @@ public class Constructor<T> extends AccessibleObject implements Member {
 
   private static native <T> T make(Class<T> c);
 
-  public T newInstance(Object ... arguments) {
+  public T newInstance(Object ... arguments)
+    throws InvocationTargetException, InstantiationException,
+    IllegalAccessException
+  {
     T v = make(method.getDeclaringClass());
     method.invoke(v, arguments);
     return v;

classpath/java/lang/reflect/Field.java

@@ -35,7 +35,8 @@ public class Field<T> extends AccessibleObject {
     return Class.forCanonicalName(getName());
   }
 
-  public native Object get(Object instance);
+  public native Object get(Object instance) throws IllegalAccessException;
 
-  public native void set(Object instance, Object value);
+  public native void set(Object instance, Object value)
+    throws IllegalAccessException;
 }

classpath/java/lang/reflect/Method.java

@@ -87,5 +87,6 @@ public class Method<T> extends AccessibleObject implements Member {
     return types;
   }
 
-  public native Object invoke(Object instance, Object ... arguments);
+  public native Object invoke(Object instance, Object ... arguments)
+    throws InvocationTargetException, IllegalAccessException;
 }

classpath/java/util/HashMap.java

@@ -52,7 +52,7 @@ public class HashMap<K, V> implements Map<K, V> {
           Cell<K, V> next;
           for (Cell<K, V> c = array[i]; c != null; c = next) {
             next = c.next();
-            int index = c.getKey().hashCode() & (capacity - 1);
+            int index = c.hashCode() & (capacity - 1);
             c.setNext(array[index]);
             array[index] = c;
           }