I have a URL string where I need to replace the last collection of characters after the final "/"
In Ruby, this would be:
str = "/some/url/structure"
ar = str.split("/")
ar[ar.length-1] = "path"
string = ar.join("/")
>> "/some/url/path"
How can I do this in Java?
This snippet demonstrates how to do it with Java:
System.out.println("one/two/four".replaceAll("/[^/]+$", "/three"));
It takes the input String ("one/two/four") and replaces everything starting from the last slash (including the slash) with the replacement String.
Minor change - + instead of * leaves urls with a slash as a last char unchanged. Seems a more practical solution to me.
I don't fully understand, what exactly do you want, but you may construct a StringBuilder from your string, use it's lastIndexOf("/") method to determine last / position, and, finally, use append() or replace() to add something to the end (or instead of the current ending).
Or use this if you are not so used to regular expressions.
url.substring(0, url.lastIndexOf("/")+1).concat("newvalue");
Frozen Spider is absolutely right. You can use the following Code :
String str = "/some/url/structure";
int lst=str.lastIndexOf("/");
str=str.replace(str.substring(lst+1),"path");
System.out.println(str);
What i did is, i took last index of '\', and replaced the string starting from last '/', with "path".
In Fully Shortest Form:
System.out.println(str.replace(str.substring(str.lastIndexOf("/")+1),"path"));
Try This...
String str = "/some/url/structure";
String[] ar = str.split("/");
int n = ar.length;
str = "";
for (int i = 0; i < (n - 1); i++) {
str += ar[i] + "/";
}
str += "path";
System.out.println(str);
I think you want to replace /structure with your content. Then you should try str.replce('/structure','/parth').
/structure inside the string "/foo/structure/bar" (ie. not the last occurrence)