Reading and Writing w/my servlet

I'm experimenting with Java Servlets and Java, and have hit a wall with I/O. What methods would I use to open a file, read through it to the end, and write to the end of the file? With PERL (which I have experience with), you can open a file into an array, wich each component of the array equal to one line. Is there some sort of similar method in JAVA?

Thanks

If you want to read a non-binary file line by line you can use a LineNumberReader chained to a FileReader. i.e

LineNumberReader reader = new LineNumberReader( new FileReader( "/home/myHome/theFile" ) );

String lineOfText = reader.readLine();
while( null != lineOfText )
{
//do whatever here with the line of text
lineOfText = reader.readLine();
}
reader.close();

If you want to write/append to the end of a non-binary file you can use a FileOutputStream or a FileWriter. Take a look at the Java API in the IO section and you will find the constructor that allows you to append to a file instead of writing over it