Java中的字节流
它们以字节(8位)为单位处理数据,即字节流类读取/写入8位数据。使用这些可以存储字符,视频,音频,图像等。
InputStream和OutputStream类(抽象)是所有输入/输出流类的超类:用于读取/写入字节流的类。以下是Java提供的字节数组流类-
示例
以下Java程序使用FileInputStream从特定文件读取数据,然后使用FileOutputStream将数据写入另一个文件。
import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; public class IOStreamsExample { public static void main(String args[]) throws IOException { //Creating FileInputStream object File file = new File("D:/myFile.txt"); FileInputStream fis = new FileInputStream(file); byte bytes[] = new byte[(int) file.length()]; //Reading data from the file fis.read(bytes); //Writing data to another file File out = new File("D:/CopyOfmyFile.txt"); FileOutputStream outputStream = new FileOutputStream(out); //Writing data to the file outputStream.write(bytes); outputStream.flush(); System.out.println("Data successfully written in the specified file"); } }
输出结果
Data successfully written in the specified file