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

Question

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()?

Answer 1

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

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