Split Java String by New Line

Question

I m trying to split text in a JTextArea using a regex to split the String by  n However  this does not work and I also tried by  r n  r n and many other combination of regexes  Code   public void insertUpdate DocumentEvent e        String split    docStr   null      Document textAreaDoc    Document e getDocument         try           docStr   textAreaDoc getText textAreaDoc getStartPosition   getOffset    textAreaDoc getEndPosition   getOffset           catch  BadLocationException e1               TODO Auto-generated catch block         e1 printStackTrace               split   docStr split    n

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try this hope it was helpful for you       String split    docStr   null  Document textAreaDoc    Document e getDocument     try       docStr   textAreaDoc getText textAreaDoc getStartPosition   getOffset    textAreaDoc getEndPosition   getOffset       catch  BadLocationException e1           TODO Auto-generated catch block     e1 printStackTrace       split   docStr split   n

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If you don   t want empty lines   String split     r  n

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For preserving empty lines from getting squashed use   String lines     String split    r   n   -1

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Maybe this would work   Remove the double backslashes from the parameter of the split method   split   docStr split   n

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In JDK11 the String class has a lines   method      Returning a stream of lines extracted from this string  separated by   line terminators     Further  the documentation goes on to say      A line terminator is one of the following  a line feed character   n     U 000A   a carriage return character   r   U 000D   or a carriage   return followed immediately by a line feed   r n   U 000D U 000A   A   line is either a sequence of zero or more characters followed by a   line terminator  or it is a sequence of one or more characters   followed by the end of the string  A line does not include the line   terminator    With this one can simply do   Stream lt String gt  stream   str lines      then if you want an array   String   array   str lines   toArray String    new     Given this method returns a Stream it upon up a lot of options for you as it enables one to write concise and declarative expression of possibly-parallel operations

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If  for some reason  you don t want to use String split  for example  because of regular expressions  and you want to use functional programming on Java 8 or newer   List lt String gt  lines   new BufferedReader new StringReader string            lines            collect Collectors toList

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If  for some reason  you don t want to use String split  for example  because of regular expressions  and you want to use functional programming on Java 8 or newer   List lt String gt  lines   new BufferedReader new StringReader string            lines            collect Collectors toList

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For preserving empty lines from getting squashed use   String lines     String split    r   n   -1

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There are three different conventions  it could be said that those are de facto standards  to set and display a line break    carriage return   line feed line feed carriage return   In some text editors  it is possible to exchange one for the other     The simplest thing is to normalize to line feedand then split   final String   lines   contents replace   r n     n                                   replace   r     n                                   split   n   -1

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String split System getProperty  line separator       This should be system independent

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After failed attempts on the basis of all given solutions  I replace  n with some special word and then split  For me following did the trick   article    Alice phoned n bob    article   article replace    n     NEWLINE     String sen      article split   NEWLINE       I couldn t replicate the example given in the question  But  I guess this logic can be applied

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A new method lines has been introduced to String class in java-11  which returns Stream lt String gt      Returns a stream of substrings extracted from this string partitioned   by line terminators       Line terminators recognized are line feed   n   U 000A   carriage   return   r   U 000D  and a carriage return followed immediately by a   line feed   r n   U 000D U 000A     Here are a few examples    jshell gt   lorem  n ipusm  n sit  lines   forEach System out  println  lorem  ipusm  sit  jshell gt   lorem  n ipusm  r  sit  lines   forEach System out  println  lorem  ipusm   sit  jshell gt   lorem  n ipusm  r n  sit  lines   forEach System out  println  lorem  ipusm   sit   String lines

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The above answers did not help me on Android  thanks to the Pshemo response that worked for me on Android  I will leave some of Pshemo s answer here    split      n

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After failed attempts on the basis of all given solutions  I replace  n with some special word and then split  For me following did the trick   article    Alice phoned n bob    article   article replace    n     NEWLINE     String sen      article split   NEWLINE       I couldn t replicate the example given in the question  But  I guess this logic can be applied

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String lines    String split  System lineSeparator

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Maybe this would work   Remove the double backslashes from the parameter of the split method   split   docStr split   n

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You don t have to double escape characters in character groups   For all non empty lines use   String split    r n

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Maybe this would work   Remove the double backslashes from the parameter of the split method   split   docStr split   n

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There is new boy in the town  so you need not to deal with all above complexities  From JDK 11 onward  just need to write as single line of code  it will split lines and returns you Stream of String   public class MyClass   public static void main String args         Stream lt String gt  lines  foo  n bar  n baz  lines         Do whatever you want to do with lines      Some references  https   docs oracle com en java javase 11 docs api java base java lang String html lines   https   www azul com 90-new-features-and-apis-in-jdk-11   I hope this will be helpful to someone  Happy coding

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String split System getProperty  line separator       This should be system independent

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There are three different conventions  it could be said that those are de facto standards  to set and display a line break    carriage return   line feed line feed carriage return   In some text editors  it is possible to exchange one for the other     The simplest thing is to normalize to line feedand then split   final String   lines   contents replace   r n     n                                   replace   r     n                                   split   n   -1

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package in javadomain   public class JavaSplit        public static void main String   args            String input    chennai nvellore ncoimbatore nbangalore narcot           System out println  Before split  n            System out println input            String   inputSplitNewLine   input split    n            System out println   n After split  n            for int i 0  i lt inputSplitNewLine length  i                 System out println inputSplitNewLine i

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String split  String regex  method is using regex  regular expressions   Since Java 8 regex supports  R which represents  from documentation of Pattern class       Linebreak matcher    R emsp  emsp  emsp  emsp  emsp  emsp  emsp  emsp  emsp Any Unicode linebreak sequence  is equivalent to    u000D u000A   u000A u000B u000C u000D u0085 u2028 u2029    So we can use it to match     u000D 000A -   r n pair    u000A -  line feed   n   u000B -  line tabulation  DO NOT confuse with character tabulation  t which is  u0009   u000C -  form feed   f   u000D -  carriage return   r   u0085 -  next line  NEL   u2028 -  line separator  u2029 -  paragraph separator   As you see  r n is placed at start of regex which ensures that regex will try to match this pair first  and only if that match fails it will try to match single character line separators     So if you want to split on line separator use split    R      If you don t want to remove from resulting array trailing empty strings    use split regex  limit  with negative limit parameter like split    R   -1    If you want to treat one or more continues empty lines as single delimiter use split    R

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Maybe this would work   Remove the double backslashes from the parameter of the split method   split   docStr split   n

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All answers given here actually do not respect Javas definition of new lines as given in e g  BufferedReader readline  Java is accepting  n   r and  r n as new line  Some of the answers match multiple empty lines or malformed files  E  g   lt sometext gt  n r n lt someothertext gt  when using   r n  would result in two lines    String lines     string split    r n  r  n    -1     In contrast  the answer above has the following properties    it complies with Javas definition of a new line such as e g  the BufferedReader is using it it does not match multiple new lines  it does not remove trailing empty lines

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This should cover you   String lines     string split    r   n      There s only really two newlines  UNIX and Windows  that you need to worry about

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The above code doesnt actually do anything visible - it just calcualtes then dumps the calculation  Is it the code you used  or just an example for this question    try doing textAreaDoc insertString int  String  AttributeSet  at the end

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If you don   t want empty lines   String split     r  n

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try this hope it was helpful for you       String split    docStr   null  Document textAreaDoc    Document e getDocument     try       docStr   textAreaDoc getText textAreaDoc getStartPosition   getOffset    textAreaDoc getEndPosition   getOffset       catch  BadLocationException e1           TODO Auto-generated catch block     e1 printStackTrace       split   docStr split   n

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All answers given here actually do not respect Javas definition of new lines as given in e g  BufferedReader readline  Java is accepting  n   r and  r n as new line  Some of the answers match multiple empty lines or malformed files  E  g   lt sometext gt  n r n lt someothertext gt  when using   r n  would result in two lines    String lines     string split    r n  r  n    -1     In contrast  the answer above has the following properties    it complies with Javas definition of a new line such as e g  the BufferedReader is using it it does not match multiple new lines  it does not remove trailing empty lines

User · Answer

The above code doesnt actually do anything visible - it just calcualtes then dumps the calculation  Is it the code you used  or just an example for this question    try doing textAreaDoc insertString int  String  AttributeSet  at the end

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As an alternative to the previous answers  guava s Splitter API can be used if other operations are to be applied to the resulting lines  like trimming lines or filtering empty lines    import com google common base Splitter   Iterable lt String gt  split   Splitter onPattern   r  n   trimResults   omitEmptyStrings   split docStr     Note that the result is an Iterable and not an array

User · Answer

The above code doesnt actually do anything visible - it just calcualtes then dumps the calculation  Is it the code you used  or just an example for this question    try doing textAreaDoc insertString int  String  AttributeSet  at the end

User · Answer

In JDK11 the String class has a lines   method      Returning a stream of lines extracted from this string  separated by   line terminators     Further  the documentation goes on to say      A line terminator is one of the following  a line feed character   n     U 000A   a carriage return character   r   U 000D   or a carriage   return followed immediately by a line feed   r n   U 000D U 000A   A   line is either a sequence of zero or more characters followed by a   line terminator  or it is a sequence of one or more characters   followed by the end of the string  A line does not include the line   terminator    With this one can simply do   Stream lt String gt  stream   str lines      then if you want an array   String   array   str lines   toArray String    new     Given this method returns a Stream it upon up a lot of options for you as it enables one to write concise and declarative expression of possibly-parallel operations

User · Answer

The above answers did not help me on Android  thanks to the Pshemo response that worked for me on Android  I will leave some of Pshemo s answer here    split      n

User · Answer

This should cover you   String lines     string split    r   n      There s only really two newlines  UNIX and Windows  that you need to worry about

User · Answer

There is new boy in the town  so you need not to deal with all above complexities  From JDK 11 onward  just need to write as single line of code  it will split lines and returns you Stream of String   public class MyClass   public static void main String args         Stream lt String gt  lines  foo  n bar  n baz  lines         Do whatever you want to do with lines      Some references  https   docs oracle com en java javase 11 docs api java base java lang String html lines   https   www azul com 90-new-features-and-apis-in-jdk-11   I hope this will be helpful to someone  Happy coding

User · Answer

The above code doesnt actually do anything visible - it just calcualtes then dumps the calculation  Is it the code you used  or just an example for this question    try doing textAreaDoc insertString int  String  AttributeSet  at the end

User · Answer

This should cover you   String lines     string split    r   n      There s only really two newlines  UNIX and Windows  that you need to worry about

User · Answer

If you don   t want empty lines   String split     r  n

User · Answer

If you don   t want empty lines   String split     r  n

User · Answer

As an alternative to the previous answers  guava s Splitter API can be used if other operations are to be applied to the resulting lines  like trimming lines or filtering empty lines    import com google common base Splitter   Iterable lt String gt  split   Splitter onPattern   r  n   trimResults   omitEmptyStrings   split docStr     Note that the result is an Iterable and not an array

User · Answer

You don t have to double escape characters in character groups   For all non empty lines use   String split    r n

User · Answer

A new method lines has been introduced to String class in java-11  which returns Stream lt String gt      Returns a stream of substrings extracted from this string partitioned   by line terminators       Line terminators recognized are line feed   n   U 000A   carriage   return   r   U 000D  and a carriage return followed immediately by a   line feed   r n   U 000D U 000A     Here are a few examples    jshell gt   lorem  n ipusm  n sit  lines   forEach System out  println  lorem  ipusm  sit  jshell gt   lorem  n ipusm  r  sit  lines   forEach System out  println  lorem  ipusm   sit  jshell gt   lorem  n ipusm  r n  sit  lines   forEach System out  println  lorem  ipusm   sit   String lines

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String lines    String split  System lineSeparator

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package in javadomain   public class JavaSplit        public static void main String   args            String input    chennai nvellore ncoimbatore nbangalore narcot           System out println  Before split  n            System out println input            String   inputSplitNewLine   input split    n            System out println   n After split  n            for int i 0  i lt inputSplitNewLine length  i                 System out println inputSplitNewLine i

User · Answer

This should cover you   String lines     string split    r   n      There s only really two newlines  UNIX and Windows  that you need to worry about

User · Answer

String split  String regex  method is using regex  regular expressions   Since Java 8 regex supports  R which represents  from documentation of Pattern class       Linebreak matcher    R emsp  emsp  emsp  emsp  emsp  emsp  emsp  emsp  emsp Any Unicode linebreak sequence  is equivalent to    u000D u000A   u000A u000B u000C u000D u0085 u2028 u2029    So we can use it to match     u000D 000A -   r n pair    u000A -  line feed   n   u000B -  line tabulation  DO NOT confuse with character tabulation  t which is  u0009   u000C -  form feed   f   u000D -  carriage return   r   u0085 -  next line  NEL   u2028 -  line separator  u2029 -  paragraph separator   As you see  r n is placed at start of regex which ensures that regex will try to match this pair first  and only if that match fails it will try to match single character line separators     So if you want to split on line separator use split    R      If you don t want to remove from resulting array trailing empty strings    use split regex  limit  with negative limit parameter like split    R   -1    If you want to treat one or more continues empty lines as single delimiter use split    R

[java] Split Java String by New Line

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