CODEWITHSUNDEEP
javanewline
Tal
Tal

Reputation: 3

removing space before new line in java

i have a space before a new line in a string and cant remove it (in java). I have tried the following but nothing works:

strToFix = strToFix.trim();
strToFix = strToFix.replace(" \n", "");
strToFix = strToFix.replaceAll("\\s\\n", "");

Upvotes: 0

Views: 6669

Answers (6)

Mike Samuel
Mike Samuel

Reputation: 120506

myString.replaceAll("[ \t]+(\r\n?|\n)", "$1");

replaceAll takes a regular expression as an argument. The [ \t] matches one or more spaces or tabs. The (\r\n?|\n) matches a newline and puts the result in $1.

Upvotes: 3

prolink007
prolink007

Reputation: 34534

I believe with this one you should try this instead:

strToFix = strToFix.replace(" \\n", "\n");

Edit:

I forgot the escape in my original answer. James.Xu in his answer reminded me.

Upvotes: 1

James.Xu
James.Xu

Reputation: 8295

try this:

strToFix = strToFix.replaceAll(" \\n", "\n");

'\' is a special character in regex, you need to escape it use '\'.

Upvotes: 1

levis501
levis501

Reputation: 4207

trim() seems to do what your asking on my system. Here's the code I used, maybe you want to try it on your system:

public class so5488527 {
    public static void main(String [] args)
    {
        String testString1 = "abc \n";
        String testString2 = "def \n";
        String testString3 = "ghi \n";
        String testString4 = "jkl \n";
        testString3 = testString3.trim();
        System.out.println(testString1);
        System.out.println(testString2.trim());
        System.out.println(testString3);
        System.out.println(testString4.trim());
    }
}

Upvotes: 0

Riccardo Cossu
Riccardo Cossu

Reputation: 2739

are you sure it is a space what you're trying to remove? You should print string bytes and see if the first byte's value is actually a 32 (decimal) or 20 (hexadecimal).

Upvotes: 0

Peter Lawrey
Peter Lawrey

Reputation: 533492

Are you sure?

String s1 = "hi     ";
System.out.println("|" + s1.trim() + "|");

String s2 = "hi     \n";
System.out.println("|" + s2.trim() + "|");

prints

|hi|
|hi|

Upvotes: 0

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