public abstract class MnistDbFile
extends java.io.RandomAccessFile
Constructor and Description |
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MnistDbFile(java.lang.String name,
java.lang.String mode)
Creates new instance and reads the header information.
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Modifier and Type | Method and Description |
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int |
getCount() |
long |
getCurrentIndex()
The current entry index.
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int |
getEntryLength()
Number of bytes for each entry.
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int |
getHeaderSize() |
protected abstract int |
getMagicNumber()
MNIST DB files start with unique integer number.
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void |
next()
Move to the next entry.
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void |
prev()
Move to the previous entry.
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void |
setCurrentIndex(long curr)
Set the required current entry index.
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close, getChannel, getFD, getFilePointer, length, read, read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, seek, setLength, skipBytes, write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF
public MnistDbFile(java.lang.String name, java.lang.String mode) throws java.io.IOException
name
- the system-dependent filenamemode
- the access modejava.io.IOException
java.io.FileNotFoundException
RandomAccessFile
protected abstract int getMagicNumber()
public long getCurrentIndex() throws java.io.IOException
java.io.IOException
public void setCurrentIndex(long curr)
curr
- the entry indexpublic int getHeaderSize()
public int getEntryLength()
public void next() throws java.io.IOException
java.io.IOException
public void prev() throws java.io.IOException
java.io.IOException
public int getCount()