### Question:
RMap extends RCollection { public void put(String key, String mkey, byte[] value) throws KitDBException { putTTL(key, mkey, value, -1); } protected  RMap(DB db); void put(String key, String mkey, byte[] value); void putTTL(String key, String mkey, byte[] value, int ttl); void put(String key, Map<String, byte[]> map); void putMayTTL(String key, int ttl, Map<String, byte[]> map); void putMayTTL(String key, int ttl, String mkey, byte[] value); Map<String, byte[]> get(String key, String... keys); byte[] get(String key, String mkey); void remove(String key, String... keys); @Override void delete(String key); @Override KeyIterator getKeyIterator(); void deleteFast(String key); @Override RIterator<RMap> iterator(String key); @Override Entry getEntry(RocksIterator iterator); @Override int getTtl(String key); @Override void delTtl(String key); @Override void ttl(String key, int ttl); @Override boolean isExist(String key); @Override int size(String key); static byte[] HEAD_B; final static byte[] HEAD_KEY_B; }### Answer:
@Test public void put() throws Exception { String head = "put0"; RMap map = db.getMap(); int num = 10 * 10000; try { for (int i = 0; i < num; i++) { map.put(head, "hello" + i, ("world" + i).getBytes()); } for (int i = 0; i < num; i++) { byte[] bytes = map.get(head, ("hello" + i)); Assert.assertEquals(new String(bytes), ("world" + i)); } } finally { map.delete(head); } }