1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2  * contributor license agreements.  See the NOTICE file distributed with
3  * this work for additional information regarding copyright ownership.
4  * The ASF licenses this file to You under the Apache License, Version 2.0
5  * (the "License"); you may not use this file except in compliance with
6  * the License.  You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package java.io;
18 
19 /**
20  * Defines an interface for classes that can (or need to) be flushed, typically
21  * before some output processing is considered to be finished and the object
22  * gets closed.
23  */
24 public interface Flushable {
25     /**
26      * Flushes the object by writing out any buffered data to the underlying
27      * output.
28      *
29      * @throws IOException
30      *             if there are any issues writing the data.
31      */
flush()32     void flush() throws IOException;
33 }
34