Exception in thread "main" java.util.UnknownFormatConversionException: Conversion = '-'
at java.util.Formatter.checkText(Formatter.java:2579)
at java.util.Formatter.parse(Formatter.java:2555)
at java.util.Formatter.format(Formatter.java:2501)
at java.io.PrintStream.format(PrintStream.java:970)
at Ideone.main(Main.java:14)