Save text file java 7

I wonder how many thousands of people have taken this example as-is only to find that they have unexpected results when they overwrite a file with a shorter string. In java 11 you can simply put a String as a second parameter! Jorn Jorn XP1 I know, that's a great improvement. Don't forget to call out.

AlexByrth why should he? Large files are recorded in the background another thread and take time to record. Calling flush ensures that everything has been written on the next line, synchronizing the operation.

But this is optional , but good practice if you handle large files, as logs. Note that out. Dave Jarvis Artem Barger Artem Barger Wrapping a FileWriter in a BufferedWriter is superfluous when you're writing out the entire file in a single write call.

It seems that. Swallowing exceptions like that is going to make life hard for you when exceptions really do occur. At the very least you should rethrow them: throw new RuntimeException e ; — Roger Keays. Ankur I couldn't disagree more. These libraries are there so we don't introduce subtle bugs in such a simple solution. No, obviously not. I'm only disagreeing that your solution might not be the first thing I'd throw at someone who's a beginner Java programmer.

You aren't suggesting that you've never written such a thing, are you? I have, yes, but that's before I found commons-io. Since finding that, I've never written that sort of thing by hand, even in a one-class project.

If I'd known about it from day one, I'd have used it from day one. Exactly, but you're an experienced developer. I'm not disagreeing with the proper use of libraries.

I'm saying that people attempting a language for the first time should try to know it at its bottom, even if that means doing things that they'll discard later on when they're experienced and know better.

I implemented this without commons and got a less than obvious exception thrown. I then implemented this using commons and it told me exactly what was wrong. Moral of the story: why live in the dark ages if you don't have to? Show 3 more comments. The following example would create a non-existing file or append the string to an existing one: Files. Marcel Marcel 9 9 silver badges 11 11 bronze badges. This needs more upvotes. The answer gets buried in the amount of answers provided to this question, yet it is superior to many of them.

Adam Wagner That doesn't close the file in case of an exception. JanusTroelsen: If rejected, cite The try-with-resources Statement. Janus Troelsen Spina Spina 8, 7 7 gold badges 36 36 silver badges 36 36 bronze badges.

If you're using Guava, there is also Charsets. PrintWriter lets us format the text before writing it down. It contains methods we're used to, such as printf , println , etc. Let's create a PrintWriter :. A better way to work with a PrintWriter is with the try-with-resources syntax:. Check out our hands-on, practical guide to learning Git, with best-practices, industry-accepted standards, and included cheat sheet.

Stop Googling Git commands and actually learn it! PrintWriter , like the StringBuilder provides the append method which allows us to append contents to the end of an existing file. The append method returns the PrintWriter object it was called upon. This makes it possible to chain append methods and organize them more neatly:. PrintWriter contains methods for formatted printing. You'll need exception handling, as ever. Be sure to call out.

If you are using Java 7 or later, you can use the " try-with-resources statement " which will automatically close your PrintStream when you are done with it ie exit the block like so:.

You will still need to explicitly throw the java. FileNotFoundException as before. Interview Questions core java interview question data structure and algorithm 80 Coding Interview Question 75 interview questions 70 design patterns 35 SQL Interview Questions 34 object oriented programming 34 thread interview questions 30 spring interview questions 28 collections interview questions 25 database interview questions 16 servlet interview questions 15 Programming interview question 6 hibernate interview questions 6.

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