Java print contents of text file to screen

Question

I have a text file named foo txt  and its contents are as below   this is text  How would I print this exact file to the screen in Java 7

User · Answer

With Java 7 s try-with-resources Jiri s answer can be improved upon   try  BufferedReader br   new BufferedReader new FileReader  foo txt          String line   null     while   line   br readLine       null           System out println line            Add exception handling at the place of your choice  either in this try or elsewhere

User · Answer

Before Java 7    BufferedReader br   new BufferedReader new FileReader  foo txt      String line   while   line   br readLine       null       System out println line         add exception handling add closing the stream   Since Java 7  there is no need to close the stream  because it implements autocloseable  try  BufferedReader br   new BufferedReader new FileReader  foo txt          String line     while   line   br readLine       null           System out println line

User · Answer

Why hasn t anyone thought it was worth mentioning Scanner   Scanner input   new Scanner new File  foo txt      while  input hasNextLine         System out println input nextLine

User · Answer

For those new to Java and wondering why Jiri s answer doesn t work  make sure you do what he says and handle the exception or else it won t compile   Here s the bare minimum   import java io BufferedReader  import java io FileReader  import java io IOException   public class ReadFile        public static void main String args    throws IOException           BufferedReader br   new BufferedReader new FileReader  test txt             for  String line   line   br readLine       null                 System out print line                     br close

User · Answer

Every example here shows a solution using the FileReader  It is convenient if you do not need to care about a file encoding  If you use some other languages than english  encoding is quite important  Imagine you have file with this text  Pr  li     lutouck   kun   pel d  belsk     dy   and the file uses windows-1250 format  If you use FileReader you will get this result   P  li   lu ou k  k    p l   belsk   dy   So in this case you would need to specify encoding as Cp1250  Windows Eastern European  but the FileReader doesn t allow you to do so  In this case you should use InputStreamReader on a FileInputStream   Example   String encoding    Cp1250   File file   new File  foo txt     if  file exists          try  BufferedReader br   new BufferedReader new InputStreamReader new FileInputStream file   encoding              String line   null          while   line   br readLine       null                System out println line                   catch  IOException e            e printStackTrace            else       System out println  file doesn t exist        In case you want to read the file character after character do not use BufferedReader   try  InputStreamReader isr   new InputStreamReader new FileInputStream file   encoding         int data   isr read        while  data    -1            System out print  char  data           data   isr read            catch  IOException e        e printStackTrace

[java] Java: print contents of text file to screen

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