Closeable接口又继承了另外的父接口AutoCloseable
其中close()方法是关闭流并且释放与其相关的任何方法,如果流已被关闭,那么调用此方法没有效果。
InputStream和OutputStream类都实现了该接口。
源码:
package java.io;
import java.io.IOException;
/**
* A {@code Closeable} is a source or destination of data that can be closed.
* The close method is invoked to release resources that the object is
* holding (such as open files).
*
* @since 1.5
*/
public interface Closeable extends AutoCloseable {
/**
* Closes this stream and releases any system resources associated
* with it. If the stream is already closed then invoking this
* method has no effect.
*
* <p> As noted in {@link AutoCloseable#close()}, cases where the
* close may fail require careful attention. It is strongly advised
* to relinquish the underlying resources and to internally
* <em>mark</em> the {@code Closeable} as closed, prior to throwing
* the {@code IOException}.
*
* @throws IOException if an I/O error occurs
*/
public void close() throws IOException;
}