Removing blank line from String

[JehanNYNJ]

Here is a string with a blank line created when the user hit the enter
key twice..

"Type this first

Hit enter twice and I am here".

How do I compress this String extra blank line so it looks like

"Type this first
Hit enter twice and I am here"

Thanks for any help,
Jehan

 

[Manish Pandit]

You want to remove the 'extra' blank line or any blank line? You can
use StringReader and wrap it within BufferedReader, do a readLine and
if the line being read is empty, do not include it in your output. This
may not be the best solution if the strings are huge though.

-cheers,
Manish

 

[Thomas Hawtin]

Here is a string with a blank line created when the user hit the enter
key twice..

"Type this first

Hit enter twice and I am here".

How do I compress this String extra blank line so it looks like

"Type this first
Hit enter twice and I am here"

I guess something like:

String compressed = str.replaceAll("\n{2,}", "\n");

Tom Hawtin

 

[Baby Lion]

Thomas Hawtin 写é“：

I guess something like:

String compressed = str.replaceAll("\n{2,}", "\n");

This solution is amazing

 

[JehanNYNJ]

I forgot to mention that I am using java 1.1, so the solution would
have to work with this API.

Basically what I have to do is compress all the blank lines of a string
up so that there are no blank lines. So for example if the user
enters..

"This is line one.

I press enter twice now here."

It should be

""This is line one.
I press enter twice now here."

If I can get a code sample, that would be great.

Thanks again,
Jehan

 

[Manish Pandit]

If I can get a code sample, that would be great.
public static String compressNewLines(String string) throws
IOException{
BufferedReader reader = new BufferedReader(new StringReader(string));
StringBuffer out = new StringBuffer();
String subString;
while((subString = reader.readLine())!=null){
if(subString.trim().length()>0) out.append(subString+"\n");
}
return out.toString().trim();
}

-cheers,
Manish

 

[JehanNYNJ]

This works.

Thanks for you help Manish.

public static String compressNewLines(String string) throws
IOException{
BufferedReader reader = new BufferedReader(new StringReader(string));
StringBuffer out = new StringBuffer();
String subString;
while((subString = reader.readLine())!=null){
if(subString.trim().length()>0) out.append(subString+"\n");
}
return out.toString().trim();
}

-cheers,
Manish