021.15 IO流 其他流

IO包中的其他类
操作基本数据类型：DataInputStream与DataOutputStream
操作字节数组：ByteArrayInputStream与ByteArrayOutputStream
操作字符数组：CharArrayReader与CharArrayWriter
操作字符串：StringReader与StringWriter

####DataInputStream与DataOutputStream
public static void main(String[] args) throws IOException
{
    writeFile();
    readFile();
}

private static void writeFile() throws IOException
{
    FileOutputStream fos = new FileOutputStream("myfile\\data.txt");
    DataOutputStream dos = new DataOutputStream(fos);

    dos.writeBoolean(true);

    dos.close();
}

private static void readFile() throws IOException
{
    FileInputStream fis = new FileInputStream("myfile\\data.txt");
    DataInputStream dis = new DataInputStream(fis);

    boolean b;
    b = dis.readBoolean();
    System.out.println(b);

    dis.close();
}

#####ByteArrayInputStream与ByteArrayOutputStream
public static void main(String[] args)
{
    ByteArrayInputStream bis = new ByteArrayInputStream("abcdef".getBytes());
    ByteArrayOutputStream bos = new ByteArrayOutputStream();

    int b;
    while((b = bis.read())!=-1){
        bos.write(b);
    }
    System.out.println(bos.toString());
}