how do you use string.trim() method to trim the white spaces only at the end?

Question

how do you use string.trim() method to trim the white spaces only at the end ?

I mean without affecting the spaces at the front side

ex : input : " this is linkedin " o/p : " this is linkedin"

Answer 1

Use regex:

str.replaceAll("\\s+$", "");

1. \s – any whitespace character

2. + – match one or more whitespace character

3. $ – at the end of the string

You can read more from here.

Answer 2

There is no right-trim method, but you can do it via several workarounds. One consists of putting a non-blank character in the beginning of the String, trimming it and then removing the character. Using String.replaceAll() would allow you to do it with a regular expression.

Answer 3

I believe you cannot do that with trim() .May be you can look for Apache commons which has an utility method StringUtils#stripEnd().

I haven't tested this , but hope it works for your purpose :

string = string.replaceAll("\\s+$", "");  

Another solution would be to iterate through the char[] obtained from the string in reverse and remove the unwanted characters !

Answer 4

try this regex

    str = str.replaceAll("(.+?) +", "$1");

Answer 5

If you necessarily have to use the trim() method,then this may be helpful:-

public class OP2 {
   public static void main(String[] s) {
      //object hash table 
       int index = 0;
       String s1 = "  sdfwf   ";
       for(int i=0;i<s1.length();i++)
       {
           if(s1.charAt(i)==' ')
               index = index + 1;
           else 
               break;
       }
       System.out.println(s1.substring(0,index)+ s1.trim());

   }
}

Answer 6

In case, if the query was for .net language then you can use the built-in RTRIM method to achieve the same.

Answer 7

In .NET/C# you can use the TrimEnd method on your string object:

" this is linkedin ".TrimEnd();

Answer 8

public class RegexRemoveEnd {   
    public static String removeTrailingSpaces(String text) {
        return text.replaceAll(" +$", "");
    }
}