Remove end of line characters from Java string

I have string like this

"hello
java
book"

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

From stackoverflow

• Given a String str:

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

  Rob Lachlan : Zounds. Beat me to it!

  Software Monkey : This is an unnecessarily inefficient way to do it.

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

• str = "hello java book" str.replaceAll("\r", "") str.replaceAll("\n", "")

  Not that I know java or anything, but I got the info from Google in less than 2 seconds.

  http://java.sun.com/j2se/1.4.2/docs/api/java/lang/String.html#replaceAll(java.lang.String,%20java.lang.String)

  wds : Which is why you got the escaping of the \r wrong. :)

• 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", "");
  

• 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.

• static byte[] discardWhitespace(byte[] data) {
      byte groomedData[] = new byte[data.length];
      int bytesCopied = 0;
  
      for (int i = 0; i < data.length; i++) {
          switch (data[i]) {
              case (byte) '\n' :
              case (byte) '\r' :
                  break;
              default:
                  groomedData[bytesCopied++] = data[i];
          }
      }
  
      byte packedData[] = new byte[bytesCopied];
  
      System.arraycopy(groomedData, 0, packedData, 0, bytesCopied);
  
      return packedData;
  }
  

  Code found on commons-codec project.