Java OutputStreamWriter close()方法

java.io.OutputStreamWriter.close() 方法关闭流，但要先刷新它。一旦流已关闭，进一步调用write() or flush() 会导致一个IOException异常被抛出。关闭以前关闭的流无效。

1 语法

public void close()

2 参数

无

3 返回值

无

4 示例 

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;

/**
 * java.io.OutputStreamWriter.close()方法的例子
 */
public class Demo {
    public static void main(String[] args) {
        try {
            // create a new OutputStreamWriter
            OutputStream os = new FileOutputStream("test.txt");
            OutputStreamWriter writer = new OutputStreamWriter(os);

            // create a new FileInputStream to read what we write
            FileInputStream in = new FileInputStream("test.txt");

            // write something in the file
            writer.write(70);

            // flush the stream
            writer.flush();

            // read what we write
            System.out.println("" + (char) in.read());

            // close the stream
            System.out.println("Closing Stream...");
            writer.close();
            System.out.println("Stream closed.");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

输出结果为：

F
Closing Stream...
Stream closed.