android关于RandomAccessFile

RandomAccessFile类

/**

* Allows reading from and writing to a file in a random-access manner. This is

* different from the uni-directional sequential access that a

* {@link FileInputStream} or {@link FileOutputStream} provides. If the file is

* opened in read/write mode, write operations are available as well. The

* position of the next read or write operation can be moved forwards and

* backwards after every operation.

/**

* Constructs a new {@code RandomAccessFile} based on the file named {@code

* fileName} and opens it according to the access string in {@code mode}.

* The file path may be specified absolutely or relative to the system

* property {@code "user.dir"}.

* @param fileName

* the name of the file to open.

* @param mode

* the file access <a href="#accessmode">mode</a>, either {@code

* "r"}, {@code "rw"}, {@code "rws"} or {@code "rwd"}.

* @throws FileNotFoundException

* if the file cannot be opened or created according to {@code

* mode}.

* @throws IllegalArgumentException

* if {@code mode} is not {@code "r"}, {@code "rw"}, {@code

* "rws"} or {@code "rwd"}.

public RandomAccessFile(String fileName, String mode) throws FileNotFoundException {

this(new File(fileName), mode);

}

更多相关文章