I have many files with wrong opened { brackets from end of line and need to replace it to new line by conditon [a-z)] [{]|[a-z)][{].

input example:

public class Test {


expected output:

public class Test 


What is wrong in my solution?

sed -e '/[a-z)] [{]|[a-z)][{]/s/{/N{/g' *.java -r 
  • Can you provide samples of your input and your expected output? Best regards. – maulinglawns Nov 30 '16 at 12:39

Since you are doing this on a Mac, this sed will do it: sed 's/{$/\'$'\n{/'


echo "public class Test {

}" | sed 's/{$/\'$'\n{/'
public class Test 


If you want to edit the file "in place" execute this command:

sed -i "" 's/{$/\'$'\n{/' java


cat java 
public class Test 


Here is a reference on inserting newlines in sed on Mac.

Tested in OS X 10.11.6


You can simply use this command

sed -e s/{/\\n{/g *.java

it will replace any { by a \n{ and show the output in the screen. To replace the text in the files you can use the option in-place

sed -i s/{/\\n{/g *.java
  • Sirst command put \n as characters without replacing to new line, second show error ' sed: 1: "Test.java": invalid command code T – Artyom Nov 30 '16 at 13:14
  • are you sure you type double \ before n. this command worked on the example you made – Dababi Nov 30 '16 at 13:18
  • ➜ example sed -i '' s/{/\\n{/g *.java ➜ example cat Test.java public class Test n{ } – Artyom Nov 30 '16 at 13:23
  • ok try using double quotes (not single) sed -e "s/{/\\n{/g" *.java – Dababi Nov 30 '16 at 13:29
  • OP is using a Mac, and therefore BSD sed. – maulinglawns Nov 30 '16 at 13:38

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