CODEWITHSUNDEEP
javastringreplacestring-formatting
Alex
Alex

Reputation: 1167

UnknownFormatConversionException is caused by symbol '%' in String.format()

String template = "%s and '%'";
String result = String.format(template, "my string");
System.out.println(result);

Expected: 

my string and '%'

But result is:

java.util.UnknownFormatConversionException: Conversion = '''

Why? How to correctly declared the sequence '%' so that it's ignored by String.format()?

Upvotes: 32

Views: 17574

Answers (1)

Reimeus
Reimeus

Reputation: 159754

% is already used by format specifiers so it requires an additional % to display that character:

String template = "%s and '%%'";

Upvotes: 74

Related Questions