/**@class java.io.RandomAccessFile @extends java.io.DataOutput @extends java.io.DataInput @extends java.io.Closeable @extends java.lang.Object Instances of this class support both reading and writing to a random access file. A random access file behaves like a large array of bytes stored in the file system. There is a kind of cursor, or index into the implied array, called the <em>file pointer</em>; input operations read bytes starting at the file pointer and advance the file pointer past the bytes read. If the random access file is created in read/write mode, then output operations are also available; output operations write bytes starting at the file pointer and advance the file pointer past the bytes written. Output operations that write past the current end of the implied array cause the array to be extended. The file pointer can be read by the <code>getFilePointer</code> method and set by the <code>seek</code> method. <p> It is generally true of all the reading routines in this class that if end-of-file is reached before the desired number of bytes has been read, an <code>EOFException</code> (which is a kind of <code>IOException</code>) is thrown. If any byte cannot be read for any reason other than end-of-file, an <code>IOException</code> other than <code>EOFException</code> is thrown. In particular, an <code>IOException</code> may be thrown if the stream has been closed. @author unascribed @since JDK1.0 */ var RandomAccessFile = { /**Returns the opaque file descriptor object associated with this stream. </p> @return {Object {java.io.FileDescriptor}} the file descriptor object associated with this stream. @exception IOException if an I/O error occurs. @see java.io.FileDescriptor */ getFD : function( ) {}, /**Returns the unique {@link java.nio.channels.java.io.FileChannel java.io.FileChannel} object associated with this file. <p> The {@link java.nio.channels.FileChannel#position() </code>position<code>} of the returned channel will always be equal to this object's file-pointer offset as returned by the {@link #getFilePointer getFilePointer} method. Changing this object's file-pointer offset, whether explicitly or by reading or writing bytes, will change the position of the channel, and vice versa. Changing the file's length via this object will change the length seen via the file channel, and vice versa. @return {Object {java.nio.channels.FileChannel}} the file channel associated with this file @since 1.4 @spec JSR-51 */ getChannel : function( ) {}, /**Reads a byte of data from this file. The byte is returned as an integer in the range 0 to 255 (<code>0x00-0x0ff</code>). This method blocks if no input is yet available. <p> Although <code>RandomAccessFile</code> is not a subclass of <code>InputStream</code>, this method behaves in exactly the same way as the {@link java.io.InputStream#read()} method of <code>InputStream</code>. @return {Number} the next byte of data, or <code>-1</code> if the end of the file has been reached. @exception IOException if an I/O error occurs. Not thrown if end-of-file has been reached. */ read : function( ) {}, /**Reads up to <code>len</code> bytes of data from this file into an array of bytes. This method blocks until at least one byte of input is available. <p> Although <code>RandomAccessFile</code> is not a subclass of <code>InputStream</code>, this method behaves in exactly the same way as the {@link java.io.InputStream#read(byte[], int, int)} method of <code>InputStream</code>. @param {Object {byte[]}} b the buffer into which the data is read. @param {Number} off the start offset in array <code>b</code> at which the data is written. @param {Number} len the maximum number of bytes read. @return {Number} the total number of bytes read into the buffer, or <code>-1</code> if there is no more data because the end of the file has been reached. @exception IOException If the first byte cannot be read for any reason other than end of file, or if the random access file has been closed, or if some other I/O error occurs. @exception NullPointerException If <code>b</code> is <code>null</code>. @exception IndexOutOfBoundsException If <code>off</code> is negative, <code>len</code> is negative, or <code>len</code> is greater than <code>b.length - off</code> */ read : function( ) {}, /**Reads up to <code>b.length</code> bytes of data from this file into an array of bytes. This method blocks until at least one byte of input is available. <p> Although <code>RandomAccessFile</code> is not a subclass of <code>InputStream</code>, this method behaves in exactly the same way as the {@link java.io.InputStream#read(byte[])} method of <code>InputStream</code>. @param {Object {byte[]}} b the buffer into which the data is read. @return {Number} the total number of bytes read into the buffer, or <code>-1</code> if there is no more data because the end of this file has been reached. @exception IOException If the first byte cannot be read for any reason other than end of file, or if the random access file has been closed, or if some other I/O error occurs. @exception NullPointerException If <code>b</code> is <code>null</code>. */ read : function( ) {}, /**Reads <code>b.length</code> bytes from this file into the byte array, starting at the current file pointer. This method reads repeatedly from the file until the requested number of bytes are read. This method blocks until the requested number of bytes are read, the end of the stream is detected, or an exception is thrown. @param {Object {byte[]}} b the buffer into which the data is read. @exception EOFException if this file reaches the end before reading all the bytes. @exception IOException if an I/O error occurs. */ readFully : function( ) {}, /**Reads exactly <code>len</code> bytes from this file into the byte array, starting at the current file pointer. This method reads repeatedly from the file until the requested number of bytes are read. This method blocks until the requested number of bytes are read, the end of the stream is detected, or an exception is thrown. @param {Object {byte[]}} b the buffer into which the data is read. @param {Number} off the start offset of the data. @param {Number} len the number of bytes to read. @exception EOFException if this file reaches the end before reading all the bytes. @exception IOException if an I/O error occurs. */ readFully : function( ) {}, /**Attempts to skip over <code>n</code> bytes of input discarding the skipped bytes. <p> This method may skip over some smaller number of bytes, possibly zero. This may result from any of a number of conditions; reaching end of file before <code>n</code> bytes have been skipped is only one possibility. This method never throws an <code>EOFException</code>. The actual number of bytes skipped is returned. If <code>n</code> is negative, no bytes are skipped. @param {Number} n the number of bytes to be skipped. @return {Number} the actual number of bytes skipped. @exception IOException if an I/O error occurs. */ skipBytes : function( ) {}, /**Writes the specified byte to this file. The write starts at the current file pointer. @param {Number} b the <code>byte</code> to be written. @exception IOException if an I/O error occurs. */ write : function( ) {}, /**Writes <code>b.length</code> bytes from the specified byte array to this file, starting at the current file pointer. @param {Object {byte[]}} b the data. @exception IOException if an I/O error occurs. */ write : function( ) {}, /**Writes <code>len</code> bytes from the specified byte array starting at offset <code>off</code> to this file. @param {Object {byte[]}} b the data. @param {Number} off the start offset in the data. @param {Number} len the number of bytes to write. @exception IOException if an I/O error occurs. */ write : function( ) {}, /**Returns the current offset in this file. @return {Number} the offset from the beginning of the file, in bytes, at which the next read or write occurs. @exception IOException if an I/O error occurs. */ getFilePointer : function( ) {}, /**Sets the file-pointer offset, measured from the beginning of this file, at which the next read or write occurs. The offset may be set beyond the end of the file. Setting the offset beyond the end of the file does not change the file length. The file length will change only by writing after the offset has been set beyond the end of the file. @param {Number} pos the offset position, measured in bytes from the beginning of the file, at which to set the file pointer. @exception IOException if <code>pos</code> is less than <code>0</code> or if an I/O error occurs. */ seek : function( ) {}, /**Returns the length of this file. @return {Number} the length of this file, measured in bytes. @exception IOException if an I/O error occurs. */ length : function( ) {}, /**Sets the length of this file. <p> If the present length of the file as returned by the <code>length</code> method is greater than the <code>newLength</code> argument then the file will be truncated. In this case, if the file offset as returned by the <code>getFilePointer</code> method is greater than <code>newLength</code> then after this method returns the offset will be equal to <code>newLength</code>. <p> If the present length of the file as returned by the <code>length</code> method is smaller than the <code>newLength</code> argument then the file will be extended. In this case, the contents of the extended portion of the file are not defined. @param {Number} newLength The desired length of the file @exception IOException If an I/O error occurs @since 1.2 */ setLength : function( ) {}, /**Closes this random access file stream and releases any system resources associated with the stream. A closed random access file cannot perform input or output operations and cannot be reopened. <p> If this file has an associated channel then the channel is closed as well. @exception IOException if an I/O error occurs. @revised 1.4 @spec JSR-51 */ close : function( ) {}, /**Reads a <code>boolean</code> from this file. This method reads a single byte from the file, starting at the current file pointer. A value of <code>0</code> represents <code>false</code>. Any other value represents <code>true</code>. This method blocks until the byte is read, the end of the stream is detected, or an exception is thrown. @return {Boolean} the <code>boolean</code> value read. @exception EOFException if this file has reached the end. @exception IOException if an I/O error occurs. */ readBoolean : function( ) {}, /**Reads a signed eight-bit value from this file. This method reads a byte from the file, starting from the current file pointer. If the byte read is <code>b</code>, where <code>0 <= b <= 255</code>, then the result is: <blockquote><pre> (byte)(b) </pre></blockquote> <p> This method blocks until the byte is read, the end of the stream is detected, or an exception is thrown. @return {Number} the next byte of this file as a signed eight-bit <code>byte</code>. @exception EOFException if this file has reached the end. @exception IOException if an I/O error occurs. */ readByte : function( ) {}, /**Reads an unsigned eight-bit number from this file. This method reads a byte from this file, starting at the current file pointer, and returns that byte. <p> This method blocks until the byte is read, the end of the stream is detected, or an exception is thrown. @return {Number} the next byte of this file, interpreted as an unsigned eight-bit number. @exception EOFException if this file has reached the end. @exception IOException if an I/O error occurs. */ readUnsignedByte : function( ) {}, /**Reads a signed 16-bit number from this file. The method reads two bytes from this file, starting at the current file pointer. If the two bytes read, in order, are <code>b1</code> and <code>b2</code>, where each of the two values is between <code>0</code> and <code>255</code>, inclusive, then the result is equal to: <blockquote><pre> (short)((b1 << 8) | b2) </pre></blockquote> <p> This method blocks until the two bytes are read, the end of the stream is detected, or an exception is thrown. @return {Number} the next two bytes of this file, interpreted as a signed 16-bit number. @exception EOFException if this file reaches the end before reading two bytes. @exception IOException if an I/O error occurs. */ readShort : function( ) {}, /**Reads an unsigned 16-bit number from this file. This method reads two bytes from the file, starting at the current file pointer. If the bytes read, in order, are <code>b1</code> and <code>b2</code>, where <code>0 <= b1, b2 <= 255</code>, then the result is equal to: <blockquote><pre> (b1 << 8) | b2 </pre></blockquote> <p> This method blocks until the two bytes are read, the end of the stream is detected, or an exception is thrown. @return {Number} the next two bytes of this file, interpreted as an unsigned 16-bit integer. @exception EOFException if this file reaches the end before reading two bytes. @exception IOException if an I/O error occurs. */ readUnsignedShort : function( ) {}, /**Reads a character from this file. This method reads two bytes from the file, starting at the current file pointer. If the bytes read, in order, are <code>b1</code> and <code>b2</code>, where <code>0 <= b1, b2 <= 255</code>, then the result is equal to: <blockquote><pre> (char)((b1 << 8) | b2) </pre></blockquote> <p> This method blocks until the two bytes are read, the end of the stream is detected, or an exception is thrown. @return {String} the next two bytes of this file, interpreted as a <code>char</code>. @exception EOFException if this file reaches the end before reading two bytes. @exception IOException if an I/O error occurs. */ readChar : function( ) {}, /**Reads a signed 32-bit integer from this file. This method reads 4 bytes from the file, starting at the current file pointer. If the bytes read, in order, are <code>b1</code>, <code>b2</code>, <code>b3</code>, and <code>b4</code>, where <code>0 <= b1, b2, b3, b4 <= 255</code>, then the result is equal to: <blockquote><pre> (b1 << 24) | (b2 << 16) + (b3 << 8) + b4 </pre></blockquote> <p> This method blocks until the four bytes are read, the end of the stream is detected, or an exception is thrown. @return {Number} the next four bytes of this file, interpreted as an <code>int</code>. @exception EOFException if this file reaches the end before reading four bytes. @exception IOException if an I/O error occurs. */ readInt : function( ) {}, /**Reads a signed 64-bit integer from this file. This method reads eight bytes from the file, starting at the current file pointer. If the bytes read, in order, are <code>b1</code>, <code>b2</code>, <code>b3</code>, <code>b4</code>, <code>b5</code>, <code>b6</code>, <code>b7</code>, and <code>b8,</code> where: <blockquote><pre> 0 <= b1, b2, b3, b4, b5, b6, b7, b8 <=255, </pre></blockquote> <p> then the result is equal to: <p><blockquote><pre> ((long)b1 << 56) + ((long)b2 << 48) + ((long)b3 << 40) + ((long)b4 << 32) + ((long)b5 << 24) + ((long)b6 << 16) + ((long)b7 << 8) + b8 </pre></blockquote> <p> This method blocks until the eight bytes are read, the end of the stream is detected, or an exception is thrown. @return {Number} the next eight bytes of this file, interpreted as a <code>long</code>. @exception EOFException if this file reaches the end before reading eight bytes. @exception IOException if an I/O error occurs. */ readLong : function( ) {}, /**Reads a <code>float</code> from this file. This method reads an <code>int</code> value, starting at the current file pointer, as if by the <code>readInt</code> method and then converts that <code>int</code> to a <code>float</code> using the <code>intBitsToFloat</code> method in class <code>Float</code>. <p> This method blocks until the four bytes are read, the end of the stream is detected, or an exception is thrown. @return {Number} the next four bytes of this file, interpreted as a <code>float</code>. @exception EOFException if this file reaches the end before reading four bytes. @exception IOException if an I/O error occurs. @see java.io.RandomAccessFile#readInt() @see java.lang.Float#intBitsToFloat(int) */ readFloat : function( ) {}, /**Reads a <code>double</code> from this file. This method reads a <code>long</code> value, starting at the current file pointer, as if by the <code>readLong</code> method and then converts that <code>long</code> to a <code>double</code> using the <code>longBitsToDouble</code> method in class <code>Double</code>. <p> This method blocks until the eight bytes are read, the end of the stream is detected, or an exception is thrown. @return {Number} the next eight bytes of this file, interpreted as a <code>double</code>. @exception EOFException if this file reaches the end before reading eight bytes. @exception IOException if an I/O error occurs. @see java.io.RandomAccessFile#readLong() @see java.lang.Double#longBitsToDouble(long) */ readDouble : function( ) {}, /**Reads the next line of text from this file. This method successively reads bytes from the file, starting at the current file pointer, until it reaches a line terminator or the end of the file. Each byte is converted into a character by taking the byte's value for the lower eight bits of the character and setting the high eight bits of the character to zero. This method does not, therefore, support the full Unicode character set. <p> A line of text is terminated by a carriage-return character (<code>'\r'</code>), a newline character (<code>'\n'</code>), a carriage-return character immediately followed by a newline character, or the end of the file. Line-terminating characters are discarded and are not included as part of the string returned. <p> This method blocks until a newline character is read, a carriage return and the byte following it are read (to see if it is a newline), the end of the file is reached, or an exception is thrown. @return {String} the next line of text from this file, or null if end of file is encountered before even one byte is read. @exception IOException if an I/O error occurs. */ readLine : function( ) {}, /**Reads in a string from this file. The string has been encoded using a <a href="DataInput.html#modified-utf-8">modified UTF-8</a> format. <p> The first two bytes are read, starting from the current file pointer, as if by <code>readUnsignedShort</code>. This value gives the number of following bytes that are in the encoded string, not the length of the resulting string. The following bytes are then interpreted as bytes encoding characters in the modified UTF-8 format and are converted into characters. <p> This method blocks until all the bytes are read, the end of the stream is detected, or an exception is thrown. @return {String} a Unicode string. @exception EOFException if this file reaches the end before reading all the bytes. @exception IOException if an I/O error occurs. @exception UTFDataFormatException if the bytes do not represent valid modified UTF-8 encoding of a Unicode string. @see java.io.RandomAccessFile#readUnsignedShort() */ readUTF : function( ) {}, /**Writes a <code>boolean</code> to the file as a one-byte value. The value <code>true</code> is written out as the value <code>(byte)1</code>; the value <code>false</code> is written out as the value <code>(byte)0</code>. The write starts at the current position of the file pointer. @param {Boolean} v a <code>boolean</code> value to be written. @exception IOException if an I/O error occurs. */ writeBoolean : function( ) {}, /**Writes a <code>byte</code> to the file as a one-byte value. The write starts at the current position of the file pointer. @param {Number} v a <code>byte</code> value to be written. @exception IOException if an I/O error occurs. */ writeByte : function( ) {}, /**Writes a <code>short</code> to the file as two bytes, high byte first. The write starts at the current position of the file pointer. @param {Number} v a <code>short</code> to be written. @exception IOException if an I/O error occurs. */ writeShort : function( ) {}, /**Writes a <code>char</code> to the file as a two-byte value, high byte first. The write starts at the current position of the file pointer. @param {Number} v a <code>char</code> value to be written. @exception IOException if an I/O error occurs. */ writeChar : function( ) {}, /**Writes an <code>int</code> to the file as four bytes, high byte first. The write starts at the current position of the file pointer. @param {Number} v an <code>int</code> to be written. @exception IOException if an I/O error occurs. */ writeInt : function( ) {}, /**Writes a <code>long</code> to the file as eight bytes, high byte first. The write starts at the current position of the file pointer. @param {Number} v a <code>long</code> to be written. @exception IOException if an I/O error occurs. */ writeLong : function( ) {}, /**Converts the float argument to an <code>int</code> using the <code>floatToIntBits</code> method in class <code>Float</code>, and then writes that <code>int</code> value to the file as a four-byte quantity, high byte first. The write starts at the current position of the file pointer. @param {Number} v a <code>float</code> value to be written. @exception IOException if an I/O error occurs. @see java.lang.Float#floatToIntBits(float) */ writeFloat : function( ) {}, /**Converts the double argument to a <code>long</code> using the <code>doubleToLongBits</code> method in class <code>Double</code>, and then writes that <code>long</code> value to the file as an eight-byte quantity, high byte first. The write starts at the current position of the file pointer. @param {Number} v a <code>double</code> value to be written. @exception IOException if an I/O error occurs. @see java.lang.Double#doubleToLongBits(double) */ writeDouble : function( ) {}, /**Writes the string to the file as a sequence of bytes. Each character in the string is written out, in sequence, by discarding its high eight bits. The write starts at the current position of the file pointer. @param {String} s a string of bytes to be written. @exception IOException if an I/O error occurs. */ writeBytes : function( ) {}, /**Writes a string to the file as a sequence of characters. Each character is written to the data output stream as if by the <code>writeChar</code> method. The write starts at the current position of the file pointer. @param {String} s a <code>String</code> value to be written. @exception IOException if an I/O error occurs. @see java.io.RandomAccessFile#writeChar(int) */ writeChars : function( ) {}, /**Writes a string to the file using <a href="DataInput.html#modified-utf-8">modified UTF-8</a> encoding in a machine-independent manner. <p> First, two bytes are written to the file, starting at the current file pointer, as if by the <code>writeShort</code> method giving the number of bytes to follow. This value is the number of bytes actually written out, not the length of the string. Following the length, each character of the string is output, in sequence, using the modified UTF-8 encoding for each character. @param {String} str a string to be written. @exception IOException if an I/O error occurs. */ writeUTF : function( ) {}, };