CODEWITHSUNDEEP
javaandroidreplaceall
sbyd
sbyd

Reputation: 242

Java replaceAll and regex

I'm working on Android and I want to replace all ocurrences of a certain {character} in a String with another String. For example, if the character we're talking about is 'a'and the replacement is "12" then:

Input : There are {a} months in a year.
Output : There are 12 months in a year.

I don't know how to deal with the replaceAll method and regexes ...

Thank you!

Upvotes: 0

Views: 2634

Answers (4)

stinepike
stinepike

Reputation: 54692

String str = "There are {a} months in a year.";

str.replaceAll(Pattern.quote("{a}"), "12");

EDIT:

java.util.regex.Pattern.quote(String) methods returns a literal pattern String for the specified String.

Upvotes: 0

Mikita Belahlazau
Mikita Belahlazau

Reputation: 15434

As you don't need use regex here, vishal_aim's answer is better for this situation.

The first attempt with replaceAll would be 

String str = "There are {a} months in a year.";
str.replaceAll("{a}", "12");

but it doesn't work because replaceAll takes a regex and {} are special characters in regex so you need to escape them: 

str.replaceAll("\\{a\\}", "12");

Upvotes: 1

vishal_aim
vishal_aim

Reputation: 7854

you can use string.replace("{a}", "12") it replaces all occurrences of {a} by 12 in a string and doesnt take regular expression. If you need to search patterns then use replaceAll

Upvotes: 1

Blackbelt
Blackbelt

Reputation: 157457

At this purpose you can use String.format

int aInt = 12;
String.format("There are {%d} months in a year",  aInt );

Upvotes: 4

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