Replacing System.out.println with Logger.println in *.java using SED (spanned over multiple lines)

Shell Programming and Scripting
1

Hi,

Can anyone help me out for my below problem.

I need to replace all System.out.println with Logger.println in *.java using SED (spanning multiple lines)
including current & sub-directories.

I tried with below command. But it is not replacing when source text is spanned over multiple lines.

 find -name '*.java' -print -exec sed -i.bak 's/System.*println/Logger.println/g' {} \;

System.out.println
System . out . println

It is able to replace above two statements. But below statement is not able to.

System    .
out
. 
println

Also the command needs to be displayed only the list of files which were replaced.

Thanks in advance.

2

Let me know if the following command does the replacement job for you:

sed ':strt
s/System[[:space:]]*\.[[:space:]]*out[[:space:]]*\.[[:space:]]*println/Logger.println/g
/System[[:space:].]*\(out\)*[[:space:].]*\(println\)*[[:space:]]*$/ {
N
b strt
}' infile
3

Thanks for your reply.

After running the command, it displays the below message.

 sed: -e expression #1, char 169: extra characters after command

can you please recheck it.

4

Can you post the exact command you typed in? Most probably you've put everything on one line without using semicolons.
That aside, I never post some solution without verifying that it really does the job (at least on systems available to me at that moment).

1 Like
5

Thanks elixir.

I have run the command as below.

  
sed -i.bak ':strt;
s/System[[:space:]]*\.[[:space:]]*out[[:space:]]*\.[[:space:]]*println/Logger.println/g;
/System[[:space:].]*\(out\)*[[:space:].]*\(println\)*[[:space:]]*$/ {;
N;
b strt;
}' *.java;

Now it is able to replace all kind of statements (System.out.println) in *.java in the current directory only.

How can i make it work for all sub-directories as well?
Also it should display the list of all replaced files (with complete directory structure) for my further processing.

Assume, my directory structure looks like the following:

a
|

  • I.java
  • X.java
  • b
    |
  • J.java
  • Y.java
  • c
    |
  • K.java
  • Z.java

I am running the command from 'a' directory.