fiery bough
does anyone know why my regex string is failing? its supposed to detect if a string contains any of <, >, [ or ], it works on regextester but doesn't work ingame
[<>\\[\\]]
\\ = Escape character
System.out.println("[map]".matches("[<>\\[\\]]")) = false vs
https://gyazo.com/407b7f34996dde9b3d99619cf8c3357
fiery bough
fiery bough
ohhhhh
fleet forge
as you can see on regex101, it only matches the brackets, but not the whole string
that's why it returns false
if you wanna extract the brackets, you have to use a Pattern
something like this:
Pattern pattern = Pattern.compile("[<>\\[\\]]");
Matcher matcher = pattern.matcher("[map]");
oh, I see, so pattern is string.match but not whole string? or is it a configurable type thing using a different matcher
fiery bough
basically im creating a method that displays a command using a basecomponent, and when the message is clicked, it removes the [] and <> boxed items because they're not actual arguments, they're placeholders into a clickevent (suggest)
fleet forge
ah alright
so you want to do something like this:
[text] -> text
<text> -> text
right?
fiery bough
./world read <worldname> [config] -> /world read
fleet forge
ah okay so you wanna replace everything inside <> or [] brackets with "nothing"
right?
fiery bough
yeah, currently got this, seems to work using a maven test
String commandPlaintext;
StringBuilder commandPlaintextBuilder = new StringBuilder();
for (String element : commandText.split(" ")) {
if (!Pattern.compile("[<>\\[\\]]").matcher(element).find()) continue;
commandPlaintextBuilder.append(element).append(" ");
}
commandPlaintext = commandPlaintextBuilder.toString().trim();
thanks!
fleet forge
np!
btw
You can also use replaceAll
String string = "/world create [arg1] <arg2>";
System.out.println(string.replaceAll("<.*>","").replaceAll("\\[.*]",""));
this will simply print "/world create " (including the two spaces at the end)
fiery bough
oh interesting, thank you, didn't know replaceall could take regex 🤔
fleet forge
yeah it's a bit weird
String.replace takes a string to replace
String.replaceAll takes a regex
String.replaceFirst takes a regex too
fiery bough
:D?! java
fleet forge
but it's actually the same. String.replaceAll also uses a Pattern and Matcher internally 😄
this is the code for String.replaceAll:
public String replaceAll(String regex, String replacement) {
return Pattern.compile(regex).matcher(this).replaceAll(replacement);
}
interesting, why wouldnt they make replace regex too 🤔
fleet forge
well
replace is basically the same as replaceAll
just without regex support
I guess they added replace, then later they wanted to support regex so they added replaceFirst and replaceAll, i don't know 😄
fiery bough
I see, alright, well thank you for your help 👍
fleet forge
np, have a nice day :3