330 Java Tips.pdf - FTP Server

File Systems I
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File Systems I
How does Java read the text files? Can Java read the files that are in other
formats? Is the read file method in Java only recognizes the file in .txt or other text
format?
Answer: Java can read any text file ( using a java.io.FileReader for example ), the
attribute at the end is an indictor and thus is not relevant as long as the actual code
read is in the correct format. I It can read files that are in other formats bytes etc and
if you have a wierd format you could extend the IO mechanism with some work to
work with that.
Q: Is it possible to choose a directory path instead of a file path in a swing
FileChooser dialog box?
Answer: Assume you have instance chooser of type JFileChooser, invoke...
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
Q: Does anyone know the way to retrieve the path from where has been loaded
the main class of an application, not the path from where has been launched the
virtual machine?
Answer: Please use something like this:
path = System.getProperty("user.dir");
Q: How to erase the content of (text) file without create/open file again (only do
"new FileOutputStream(...)" once)?
Answer: Try java.io.RandomAccessFile.setLength(0) if you're using JDK 1.2 or
higher.
If you don't have to keep the file, it may be easier to use
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