Using RandomAccessFile Class
// Updating a selected record in a file
/**
 * This source example shows how to use RandomAccessFile for data update
 * @@author Jeff Zhuk
 */	
	// Open a file with read/write ("rw") access

	RandomAccessFile raf = new RandomAccessFile("myFile","rw");

	int index = 13;     // record number
	int recLength = 10; // record length in bytes

	String news = new String("no news"); 

	// seek for a specified record number 13

	raf.seek(index * recLength); 

	// update a record ( keep the same record length )

	for(int = 0; i < recLength; i++)
	{
		raf.writeChar((i < news.length) ? news.charAt(i) : ' ');
	}

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