Remove a trailing slash from a string(changed from url type) in JAVA

Question

I want to remove the trailing slash from a string in Java.

I want to check if the string ends with a url, and if it does, i want to remove it.

Here is what I have:

String s = "http://almaden.ibm.com/";

s= s.replaceAll("/","");

and this:

String s = "http://almaden.ibm.com/";
length  =  s.length();
--length;
Char buff = s.charAt((length);
if(buff == '/')
{
     LOGGER.info("ends with trailing slash");
/*how to remove?*/
}
else  LOGGER.info("Doesnt end with trailing slash");

But neither work.

Thomas Mueller · Accepted Answer · 2011-03-25 20:08:12Z

105

There are two options: using pattern matching (slightly slower):

s = s.replaceAll("/$", "");

or:

s = s.replaceAll("/\\z", "");

And using an if statement (slightly faster):

if (s.endsWith("/")) {
    s = s.substring(0, s.length() - 1);
}

or (a bit ugly):

s = s.substring(0, s.length() - (s.endsWith("/") ? 1 : 0));

Please note you need to use s = s..., because Strings are immutable.

edited Mar 25, 2011 at 20:08

answered Mar 25, 2011 at 20:02

Thomas Mueller

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3 Comments

Eswar Rajesh Pinapala Over a year ago

Thanks for the response, Can i know if i could perform the same operation on a variable type URL, as i want to declare it as final. replaceAll doesnt seem to work on type URL Thanks for the replies again , i am a beginner in java !

Thomas Mueller Over a year ago

java.net.URL can be converted to a java.lang.String using toString().

hagits Over a year ago

On a Jenkins file, the first solution should be: s = s.replaceAll('/$', '') with single quote, otherwise the "$" is a variable, and is not defined.

Anton · Accepted Answer · 2012-11-12 12:24:17Z

18

This should work better:

url.replaceFirst("/*$", "")

answered Nov 12, 2012 at 12:24

Anton

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1 Comment

Mike Over a year ago

This removes multiple trailing slashes which I was looking for.

Babatunde Adeyemi · Accepted Answer · 2019-09-16 15:38:21Z

16

You can achieve this with Apache Commons StringUtils as follows:

String s = "http://almaden.ibm.com/";
StringUtils.removeEnd(s, "/")

answered Sep 16, 2019 at 15:38

Babatunde Adeyemi

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1 Comment

saran3h Over a year ago

Far more concise with added benefits of null safety. Upvoted.

Eric Leschinski · Accepted Answer · 2013-04-11 22:53:49Z

8

url.replaceAll("/$", "") the $ matches the end of a string so it replaces the trailing slash if it exists.

edited Apr 11, 2013 at 22:53

Eric Leschinski

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answered Mar 25, 2011 at 19:27

CarlosZ

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1 Comment

Eswar Rajesh Pinapala Over a year ago

Thanks for the response, Can i know if i could perform the same operation on a variable type URL, as i want to declare it as final. replaceAll doesnt seem to work on type URL Thanks for the replies again , i am a beginner in java !

Serhii Bohutskyi · Accepted Answer · 2013-10-09 15:06:35Z

8

simple method in java

String removeLastSlash(String url) {
    if(url.endsWith("/")) {
        return url.substring(0, url.lastIndexOf("/"));
    } else {
        return url;
    }
}

answered Oct 9, 2013 at 15:06

Serhii Bohutskyi

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1 Comment

Dan Whitehouse Over a year ago

Good answer, though you don't need the else statement.

JB Nizet · Accepted Answer · 2011-03-25 19:31:30Z

2

As its name indicates, the replaceAll method replaces all the occurrences of the searched string with the replacement string. This is obviously not what you want. You could have found it yourself by reading the javadoc.

The second one is closer from the truth. By reading the javadoc of the String class, you'll find a useful method called substring, which extracts a substring from a string, given two indices.

answered Mar 25, 2011 at 19:31

JB Nizet

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Comments

Zar E Ahmer · Accepted Answer · 2015-01-14 12:21:50Z

2

Easiest way ...

String yourRequiredString = myString.subString(0,myString.lastIndexOf("/"));

answered Jan 14, 2015 at 12:21

Zar E Ahmer

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1 Comment

Bruce Calvert Over a year ago

This should be myString.substring, not .subString .

Community · Accepted Answer · 2020-06-20 09:12:55Z

2

a more compact way:

String pathExample = "/test/dir1/dir2/";

String trimmedSlash = pathExample.replaceAll("^/|/$","");

regexp ^/ replaces the first, /$ replaces the last

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Nov 18, 2015 at 6:47

Lorenzo Nazario

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Comments

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

If you are a user of Apache Commons Lang you can take profit of the chomp method located in StringUtils

String s = "http://almaden.ibm.com/";

StringUtils.chomp(s,File.separatorChar+"")

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Apr 26, 2012 at 9:41

Dante

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1 Comment

berezovskyi Over a year ago

Two-argument method is deprecated in favor of removeEnd: commons.apache.org/proper/commons-lang/apidocs/org/apache/…

seunggabi · Accepted Answer · 2022-11-18 04:49:18Z

0

Kotlin side

    fun removeTrailSlash(s: String): String {
        return s.replace(Regex("/$"), "")
    }

    fun String.removeTrailSlash(): String {
        return CommonUtil.removeTrailSlash(this)
    }

    @Test
    fun removeTrailSlash() {
        // given
        val expected = "asdf/qwer"
        val s = "$expected/"
        // when
        val actual = CommonUtil.removeTrailSlash(s)
        // then
        assertEquals(expected, actual)
    }
    
    @Test
    fun removeTrailSlash() {
        // given
        val expected = "asdf/qwer"
        val s = "$expected/"
        // when
        val actual = s.removeTrailSlash()
        // then
        Assertions.assertEquals(expected, actual)
    }

answered Nov 18, 2022 at 4:49

seunggabi

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Comments

Sai Aditya · Accepted Answer · 2014-05-26 12:01:17Z

-1

   if (null != str && str.length > 0 )
    {
        int endIndex = str.lastIndexOf("/");
        if (endIndex != -1)  
        {
            String newstr = str.subString(0, endIndex); // not forgot to put check if(endIndex != -1)
        }
    }

answered May 26, 2014 at 12:01

Sai Aditya

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