CODEWITHSUNDEEP
javastring
AAaa
AAaa

Reputation: 3819

what is the best way to manipulate the following string?

I have strings like:

"{0}_something_{1}-{2}-something"

and i need to convert these strings to

"%s_something_%s-%s-something"

what is the best way to do this?

Upvotes: 0

Views: 231

Answers (5)

Shef
Shef

Reputation: 45589

String str      =   "{0}something{1}-{2}-something";
String clean    =   str.replaceAll("(\\{\\d+\\}-?)", "%s_");
System.out.println(clean); // outputs: %s_something%s_%s_something

Upvotes: 1

Kaj
Kaj

Reputation: 10949

I would use a regexp. 

String data = "{0}something{1}-{2}-something";
System.out.println(data.replaceAll("\\{.*?\\}", "%s_"));

Output:

%s_something%s_-%s_-something

Edit: A regexp that only replaces if there only are digits between { and }

System.out.println(data.replaceAll("\\{\\d+\\}", "%s_"));

Upvotes: 4

Paolo Moretti
Paolo Moretti

Reputation: 55956

String result = MessageFormat.format("{0}something{1}-{2}-something", "%s_", "_%s", "%s");

Upvotes: 1

Joey
Joey

Reputation: 354506

myString.replaceAll("\\{\\d\\}", "%s")

If you're trying to create a Java format string, then you should probably retain the order of those replacements, otherwise strings like foo {2} bar {1} baz {0} will pose problems:

myString.replaceAll("\\{(\\d)\\}", "%$1$$s");

Upvotes: 6

spot35
spot35

Reputation: 888

Consider using MessageFormat. - http://download.oracle.com/javase/6/docs/api/java/text/MessageFormat.html

Upvotes: 0

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