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 · Answer 1 · 2011-03-25T20:08:12.560

102

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 '11 at 20:08

answered Mar 25 '11 at 20:02

Thomas Mueller

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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 ! – Eswar Rajesh Pinapala Mar 26 '11 at 00:06
1

`java.net.URL` can be converted to a `java.lang.String` using `toString()`. – Thomas Mueller Mar 26 '11 at 08:46

score 18 · Answer 2 · answered Nov 12 '12 at 12:24

18

This should work better:

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

answered Nov 12 '12 at 12:24

Anton

181
1
2

2

This removes multiple trailing slashes which I was looking for. – Mike Aug 08 '19 at 06:56

score 13 · Accepted Answer · answered Sep 16 '19 at 15:38

13

You can achieve this with Apache Commons StringUtils as follows:

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

answered Sep 16 '19 at 15:38

Babatunde Adeyemi

14,360
4
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26

Far more concise with added benefits of null safety. Upvoted. – saran3h Mar 04 '21 at 08:18

score 8 · Answer 4 · answered Oct 09 '13 at 15:06

8

simple method in java

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

answered Oct 09 '13 at 15:06

Serhii Bohutskyi

2,261
2
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28

2

Good answer, though you don't need the else statement. – Dan Whitehouse Nov 30 '17 at 01:24

score 7 · Answer 5 · edited Apr 11 '13 at 22:53

7

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

edited Apr 11 '13 at 22:53

Eric Leschinski

146,994
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answered Mar 25 '11 at 19:27

CarlosZ

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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 ! – Eswar Rajesh Pinapala Mar 26 '11 at 00:06

score 2 · Answer 6 · answered Jan 14 '15 at 12:21

2

Easiest way ...

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

answered Jan 14 '15 at 12:21

Zar E Ahmer

33,936
20
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300

2

This should be myString.substring, not .subString . – Bruce Calvert Jul 07 '20 at 20:05

score 2 · Answer 7 · edited Jun 20 '20 at 09:12

2

a more compact way:

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

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

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

edited Jun 20 '20 at 09:12

Community

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1

answered Nov 18 '15 at 06:47

Lorenzo Nazario

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1

score 2 · Answer 8 · answered Mar 25 '11 at 19:31

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.

score 1 · Answer 9 · edited Jun 20 '20 at 09:12

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 '20 at 09:12

Community

1
1

answered Apr 26 '12 at 09:41

Dante

324
3
7

Two-argument method is deprecated in favor of `removeEnd`: https://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/StringUtils.html#removeEnd-java.lang.String-java.lang.String- – berezovskyi May 02 '17 at 21:54

score 0 · Answer 10 · answered Nov 18 '22 at 04:49

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)
    }

score -1 · Answer 11 · answered May 26 '14 at 12:01

-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 '14 at 12:01

Sai Aditya

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

11 Answers11

Kotlin side

Linked