public Object put(Object key, Object value) {
Object k = maskNull(key);
int hash = hash(k);
int i = indexFor(hash, table.length);

for (Entry e = table[i]; e != null; e = e.next) {
if (e.hash == hash && eq(k, e.key)) {
Object oldValue = e.value;
e.value = value;
e.recordAccess(this);
return oldValue;
}
}

modCount++;
addEntry(hash, k, value, i);
return null;
}