com.hynnet.util

类 BufferedRandomAccessFile

java.lang.Object

java.io.RandomAccessFile

com.hynnet.util.BufferedRandomAccessFile

所有已实现的接口:

java.io.Closeable, java.io.DataInput, java.io.DataOutput, java.lang.AutoCloseable

public class BufferedRandomAccessFile
extends java.io.RandomAccessFile

扩展后的RandomAccessFile类。具备Buffer改善I/O性能。

字段概要

字段

限定符和类型	字段和说明
protected boolean	append
protected byte[]	buf
protected int	bufbitlen
protected boolean	bufdirty
protected long	bufendpos
protected long	bufmask
protected int	bufsize
protected long	bufstartpos
protected int	bufusedsize
static int	DEFAULT_BUFFER_SIZE 默认的缓存大小。
protected long	fileendpos
protected java.lang.String	filename
protected long	initfilelen
protected long	m_lcurpos

构造器概要

构造器

构造器和说明
BufferedRandomAccessFile(java.io.File file)
BufferedRandomAccessFile(java.io.File file, int bufbitlen)
BufferedRandomAccessFile(java.io.File file, java.lang.String mode)
BufferedRandomAccessFile(java.io.File file, java.lang.String mode, int bufbitlen)
BufferedRandomAccessFile(java.lang.String name)
BufferedRandomAccessFile(java.lang.String name, int bufbitlen)
BufferedRandomAccessFile(java.lang.String name, java.lang.String mode)
BufferedRandomAccessFile(java.lang.String name, java.lang.String mode, int bufbitlen)

方法概要

方法

限定符和类型	方法和说明
boolean	append(byte bw)
void	close()
long	getFilePointer()
long	length()
static void	main(java.lang.String[] args)
int	read(byte[] b)
int	read(byte[] b, int off, int len)
byte	read(long pos)
byte	readByteData()
int	readLine(byte[] arrayByte)
void	seek(long pos)
void	setLength(long newLength)
boolean	write(byte bw)
void	write(byte[] b)
void	write(byte[] b, int off, int len)
boolean	write(byte bw, long pos)

从类继承的方法 java.io.RandomAccessFile

getChannel, getFD, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, skipBytes, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

DEFAULT_BUFFER_SIZE

public static final int DEFAULT_BUFFER_SIZE

默认的缓存大小。

另请参阅:

常量字段值

buf

protected byte[] buf

bufbitlen

protected int bufbitlen

bufsize

protected int bufsize

bufmask

protected long bufmask

bufdirty

protected boolean bufdirty

bufusedsize

protected int bufusedsize

m_lcurpos

protected long m_lcurpos

bufstartpos

protected long bufstartpos

bufendpos

protected long bufendpos

fileendpos

protected long fileendpos

append

protected boolean append

filename

protected java.lang.String filename

initfilelen

protected long initfilelen

构造器详细资料

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.lang.String name)
                         throws java.io.IOException

抛出:

java.io.IOException

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.io.File file)
                         throws java.io.IOException,
                                java.io.FileNotFoundException

抛出:

java.io.IOException

java.io.FileNotFoundException

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.lang.String name,
                        int bufbitlen)
                         throws java.io.IOException

抛出:

java.io.IOException

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.io.File file,
                        int bufbitlen)
                         throws java.io.IOException,
                                java.io.FileNotFoundException

抛出:

java.io.IOException

java.io.FileNotFoundException

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.lang.String name,
                        java.lang.String mode)
                         throws java.io.IOException

抛出:

java.io.IOException

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.io.File file,
                        java.lang.String mode)
                         throws java.io.IOException,
                                java.io.FileNotFoundException

抛出:

java.io.IOException

java.io.FileNotFoundException

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.lang.String name,
                        java.lang.String mode,
                        int bufbitlen)
                         throws java.io.IOException

抛出:

java.io.IOException

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.io.File file,
                        java.lang.String mode,
                        int bufbitlen)
                         throws java.io.IOException,
                                java.io.FileNotFoundException

抛出:

java.io.IOException

java.io.FileNotFoundException

方法详细资料

read

public byte read(long pos)
          throws java.io.IOException

抛出:

java.io.IOException

readByteData

public byte readByteData()
                  throws java.io.IOException,
                         java.io.EOFException

抛出:

java.io.IOException

java.io.EOFException

readLine

public int readLine(byte[] arrayByte)
             throws java.io.IOException

抛出:

java.io.IOException

write

public boolean write(byte bw)
              throws java.io.IOException

抛出:

java.io.IOException

append

public boolean append(byte bw)
               throws java.io.IOException

抛出:

java.io.IOException

write

public boolean write(byte bw,
            long pos)
              throws java.io.IOException

抛出:

java.io.IOException

write

public void write(byte[] b,
         int off,
         int len)
           throws java.io.IOException

指定者:

write 在接口中 java.io.DataOutput

覆盖:

write 在类中 java.io.RandomAccessFile

抛出:

java.io.IOException

read

public int read(byte[] b,
       int off,
       int len)
         throws java.io.IOException

覆盖:

read 在类中 java.io.RandomAccessFile

抛出:

java.io.IOException

write

public void write(byte[] b)
           throws java.io.IOException

指定者:

write 在接口中 java.io.DataOutput

覆盖:

write 在类中 java.io.RandomAccessFile

抛出:

java.io.IOException

read

public int read(byte[] b)
         throws java.io.IOException

覆盖:

read 在类中 java.io.RandomAccessFile

抛出:

java.io.IOException

seek

public void seek(long pos)
          throws java.io.IOException

覆盖:

seek 在类中 java.io.RandomAccessFile

抛出:

java.io.IOException

length

public long length()
            throws java.io.IOException

覆盖:

length 在类中 java.io.RandomAccessFile

抛出:

java.io.IOException

setLength

public void setLength(long newLength)
               throws java.io.IOException

覆盖:

setLength 在类中 java.io.RandomAccessFile

抛出:

java.io.IOException

getFilePointer

public long getFilePointer()
                    throws java.io.IOException

覆盖:

getFilePointer 在类中 java.io.RandomAccessFile

抛出:

java.io.IOException

close

public void close()
           throws java.io.IOException

指定者:

close 在接口中 java.io.Closeable

指定者:

close 在接口中 java.lang.AutoCloseable

覆盖:

close 在类中 java.io.RandomAccessFile

抛出:

java.io.IOException

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

抛出:

java.io.IOException