Create a new line in Java s FileWriter

Question

I have coded the following FileWriter   try       FileWriter writer   new FileWriter new File  file txt    false        String sizeX   jTextField1 getText        String sizeY   jTextField2 getText        writer write sizeX       writer write sizeY        writer flush        writer close      catch  IOException ex       Now I want to insert a new line  just like you would do it with  n normally  but it doesn t seem to work   What can be done to solve this   Thank you

User · Answer

Try   String format   n      See this question for more details

User · Answer

If you mean use the same code but add a new line so that when you add something to the file it will be on a new line  You can simply use BufferedWriter s newLine    Here I have Improved you code also  NumberFormatException was unnecessary as nothing was being cast to a number data type  saving variables to use once also was   try       BufferedWriter writer   new BufferedWriter new FileWriter  file txt             writer write jTextField1 getText             writer write jTextField2 getText             writer newLine            writer flush            writer close      catch  IOException ex        System out println  File could not be created

User · Answer

Try System getProperty   line separator        writer write System getProperty   line separator

User · Answer

I would tackle the problem like this         BufferedWriter output      output   new BufferedWriter new FileWriter  file txt   true        String sizeX   jTextField1 getText        String sizeY   jTextField2 getText        output append sizeX       output append sizeY       output newLine        output close      The true in the FileWriter constructor allows to append  The method newLine   is provided by BufferedWriter Could be ok as solution

User · Answer

Here   n  is also working fine  But the problem here lies in the text editor probably notepad   Try to see the output with Wordpad

User · Answer

Try wrapping your FileWriter in a BufferedWriter   BufferedWriter bw   new BufferedWriter writer   bw newLine      Javadocs for BufferedWriter here

User · Answer

If you want to get new line characters used in current OS like  r n for Windows  you can get them by    System getProperty  line separator    since Java7 System lineSeparator   or as mentioned by Stewart generate them via String format   n        You can also use PrintStream and its println method which will add OS dependent line separator at the end of your string automatically  PrintStream fileStream   new PrintStream new File  file txt     fileStream println  your data                       will add OS line separator after data     BTW System out is also instance of PrintStream

User · Answer

One can use PrintWriter to wrap the FileWriter  as it has many additional useful methods  try PrintWriter pw   new PrintWriter new FileWriter new File  quot file txt quot    false        pw println     new line    pw print  quot text quot     print without new line    pw println 10    print with new line    pw printf  quot  2 f quot   0 567    print double to 2 decimal places  without new line

User · Answer

Since 1 8  I thought this might be an additional solution worth adding to the responses   Path java nio file Files write Path path  Iterable lines  OpenOption    options  throws IOException  StringBuilder sb   new StringBuilder    sb append jTextField1 getText     sb append jTextField2 getText     sb append System lineSeparator     Files write Paths get  file txt    sb toString   getBytes       If appending to the same file  perhaps use an Append flag with Files write    Files write Paths get  file txt    sb toString   getBytes    StandardOpenOption APPEND

[java] Create a new line in Java's FileWriter

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