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I have string like this

"hello
java
book"

I want remove \r and \n from string(hello\r\njava\r\nbook). I want a string as "hellojavabook". How can I do this?

Regex with replaceAll.

public class Main
{
    public static void main(final String[] argv) 
    {
        String str;

        str = "hello\r\njava\r\nbook";
        str = str.replaceAll("(\\r|\\n)", "");
        System.out.println(str);
    }
}

If you only want to remove \r\n when they are pairs (the above code removes either \r or \n) do this instead:

str = str.replaceAll("\\r\\n", "");

How to Replace Line Breaks , New Lines From String , How do you remove a new line character from a string in Java? We can use this to remove characters from a string. The idea is to pass an empty string as a replacement. Let’s look at the replace () methods present in the String class. replace (char oldChar, char newChar): This method returns a new string where oldChar is replaced with newChar.

If you want to avoid the regex, or must target an earlier JVM, String.replace() will do:

str=str.replace("\r","").replace("\n","");

And to remove a CRLF pair:

str=str.replace("\r\n","");

The latter is more efficient than building a regex to do the same thing. But I think the former will be faster as a regex since the string is only parsed once.

How to remove line breaks from a file in Java?, To remove newline, space and tab characters from a string, replace them with empty as shown below.replaceAll([\\n\\t ], );Above, the new line,  To remove newline, space and tab characters from a string, replace them with empty as shown below. replaceAll("[\ \\t ]", ""); Above, the new line, tab, and space will get replaced with empty, since we have used replaceAll() The following is the complete example. Example. Live Demo

public static void main(final String[] argv) 
{
    String str;

    str = "hello\r\n\tjava\r\nbook";
    str = str.replaceAll("(\\r|\\n|\\t)", "");
    System.out.println(str);
}

It would be useful to add the tabulation in regex too.

Java Trim String Examples (Trim Start, End), Windows uses the carriage return / line feed combo (two characters). The carriage return, aka CR, has an ascii value of 13. And some systems  how to remove symbols from string in java, replace unwanted characters from java string variable, replaceAll() to remove unwanted characters from string in java Please consider disabling your ad blocker for Java4s.com, we won't encourage audio ads, popups or any other annoyances at any point, hope you support us :-) Thank you.

Given a String str:

str = str.replaceAll("\\\\r","")
str = str.replaceAll("\\\\n","")

Remove newline, space and tab characters from a string in Java, Following code snippet shows how to remove line termination characters from a String. Replace New Lines : String Format « Data Type « Java Tutorial. Eclipse  2 Java String Remove Character and String Example Java Remove Character from String If you notice String class, we have replace() methods with different variations.

Have you tried using the replaceAll method to replace any occurence of \n or \r with the empty String?

remove carriage return from string (Beginning Java forum at , This example will show how to remove a carriage return from a string in java. Each operating system newline character could vary  Java's built-in method substring() of the class String is the most known way of how to remove the last character. This is done by getting from the existing String all characters starting from the first index position 0 till the next to last position, means the length of the string minus 1.

Java string remove newlines, String.replace matching JavaScript argument types (function,string) is ambiguous​; candidate methods are: class java.lang.String replace(char  You have to provide the String s and how many char you want to remove from the last to this removeLast(String s, int n) function. If the number of char s have to remove from the last is greater than the given String length then it throws a StringIndexOutOfBoundException with a custom message -

Remove newline from string, Visit each character of the string and slice them in such a way that it removes the newline and carriage return characters. Code snippet:. As noted in other answers, your code is not working primarily because String.replace() does not change the target String. (It can't - Java strings are immutable!) What replace actually does is to create and return a new String object with the characters changed as required.

How to remove all Line Feed (\n) and (\r) Carriage Return in the , 13 Nov 2019 Putting a Carriage Return, Line Feed, or End of Line character into my strings in LabVIEW seems to all do the same thing. Removing carriage  This snippet will show how to remove newlines from a string in java while using guava. CharMatcher is similar to a java predicate in the sense that it determines true or false for a set/range of chars. You can read the code as CharMatcher.BREAKING_WHITESPACE will return true for any character that represents a line break. Calling the remove method will return all non matching values or false of the phrase.

Comments
  • StringUtils.chomp()
  • I would recommend you used System.getProperty("line.separator");, instead of hardcoded line breakers. Each OS has its own line separator.
  • @GGrec sometimes the text String / File was not made by the same OS. So System.getProperty("line.separator"); won't work in these cases. But yes, if you can trust the same-OS origin, it is better to use the system property.
  • How would you use the value returned for line.separator? I tried passing "\\" + lineSeparator in the regex and it did not work
  • This is an unnecessarily inefficient way to do it.
  • This is deprecated
  • What is the problem here? Trim takes away everything and gives back just the string?
  • Trim removes leading/trailing whitespace. Line breaks in the middle of a string will not be removed.