OutputStreamWriter的write
时间: 2024-01-09 11:05:54 浏览: 29
方法有哪些重载形式?分别有什么作用?
`OutputStreamWriter` 类的 `write` 方法有以下几种重载形式:
1. `public void write(int c) throws IOException`: 将指定的字符写入流中。
2. `public void write(char[] cbuf) throws IOException`: 将指定的字符数组写入流中。
3. `public void write(char[] cbuf, int off, int len) throws IOException`: 将指定的字符数组的子数组写入流中。
4. `public void write(String str) throws IOException`: 将指定的字符串写入流中。
5. `public void write(String str, int off, int len) throws IOException`: 将指定的字符串的子字符串写入流中。
这些方法的作用都是将字符或字符串写入到输出流中,其中第一个重载方法将一个字符写入流中,其他的方法则将一个字符数组或字符串写入流中。第三个重载方法还可以指定字符数组的起始位置和长度。如果写入操作失败,这些方法会抛出 `IOException` 异常。
相关问题
OutputStreamWriter
OutputStreamWriter是一个Java类,它用于将字节流转换为字符流。它是Writer类的子类,可以将输出流(如FileOutputStream)转换为字符输出流(如FileWriter)。
使用OutputStreamWriter可以将字节流转换成字符流,方便进行文本处理和编码转换。它提供了许多构造函数,可以指定字符编码、文件路径等参数。例如,可以使用以下代码创建一个OutputStreamWriter对象:
```
OutputStream outputStream = new FileOutputStream("output.txt");
OutputStreamWriter writer = new OutputStreamWriter(outputStream, "UTF-8");
```
在这个例子中,我们创建了一个OutputStreamWriter对象,将其连接到一个文件输出流outputStream,并指定字符编码为UTF-8。这样,我们就可以使用writer对象进行字符输出操作。
OutputStreamWriter还提供了一些常用的方法,比如write()用于写入字符数据,flush()用于刷新缓冲区,close()用于关闭流等。
希望这个解答能够满足你的需求!如果你有更多问题,请随时提问。
outputstreamwriter
OutputStreamWriter is a class in Java that converts characters into bytes by writing them to an OutputStream. It is a bridge between character streams and byte streams, allowing character data to be written to an OutputStream.
The OutputStreamWriter class provides a way to write characters to an OutputStream in a specified character encoding. It takes a character output stream and a character encoding as input parameters and converts the characters to bytes in the specified encoding before writing them to the output stream.
Some of the commonly used methods of the OutputStreamWriter class are:
- write(char[] cbuf, int off, int len): Writes a portion of an array of characters to the output stream.
- write(int c): Writes a single character to the output stream.
- flush(): Flushes the output stream and writes any buffered output to the underlying stream.
- close(): Closes the output stream and releases any system resources associated with it.
OutputStreamWriter is useful when we need to write character data to an OutputStream, for example, when writing to a file or sending data over a network. It provides a convenient way to convert characters to bytes in a specific encoding and write them to the output stream.
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