CODEWITHSUNDEEP
javastringcontainsmetacharacters
LeWimbes
LeWimbes

Reputation: 507

String contains any but one character

I want to check if a String contains a } with any character in front of it except \. As far as I know I can use . as a metacharacter in aString.contains(...) to allow any character at that position but I don’t know how to create something like a blacklist: aString.contains(“.(except ‘\‘)}“Is that possible without creating an own method?

Upvotes: -1

Views: 135

Answers (1)

Bohemian
Bohemian

Reputation: 425043

You need regex (well technically you don't need regex, but it's the best way):

if (aString.matches(".*(?<!\\\\)}.*"))

This regex says the string should be made up as follows

  • .* zero or more of any character
  • (?<!\\\\) the previous char is not a backslash
  • } a curly right bracket
  • .* zero or more of any character

This also works for the edge case of the first char being the curly bracket.

See live demo.

Upvotes: 1

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