What printf conversion should be used for boolean values?

Question

I know it's a very simple question, but I would like to know the string format for the boolean type. For instance, below shows the string formats for integer, string and float. What would be the proper format for boolean values true/false?

System.out.printf("The value of the float " +
                  "variable is %f, while " +
                  "the value of the " + 
                  "integer variable is %d, " +
                  "and the string is %s", 
                  floatVar, intVar, stringVar); 

Answer 1

'b' or 'B' general If the argument arg is null, then the result is "false". If arg is a boolean or Boolean, then the result is the string returned by String.valueOf(arg). Otherwise, the result is "true". java docs : http://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax