Granny's Programming Pearls
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Printwriter

 
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this line does not print new line:


Why?

and when we have classes like datainputstream and dataoutputstream that covers different datas, Why do you use Printwriter class?What is the main usage of Printwriter?
 
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I would have to refer you to the Java® Tutorials (try the character streams section) about PrintWriter. Basically, you need to distinguish between writers and readers for characters (text‑based files) and bytes (non‑text files or binary files). Go through the whole Tutorials trail and that should explain everything.
You may be missing line ends because you are using \n which is the wrong line end for Windows®. Don't use \n even though you find it in many books. If you look through the PrintWriter ←link documentation you see it may not flush automatically even with \n. Use println instead of print.
 
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