Java 7: Formatting text, numbers and dates

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Quan estas programant, i sobretot debuggant, es molt interessant poder utilitzar formats al imprimir errors i missatges.
Aixi, pots substituir System.out.println( per System.out.format(

i aplicar els següents modificadors:

n	Independent platform New Line
d	A decimal integer.
f	A float.
n	A new line character appropriate to the platform running the application. You should always use %n, rather than \n.
tB	A date & time conversion—locale-specific full name of month.
td, te	A date & time conversion—2-digit day of month. td has leading zeroes as needed, te does not.
ty, tY	A date & time conversion—ty = 2-digit year, tY = 4-digit year.
tl	A date & time conversion—hour in 12-hour clock.
tM	A date & time conversion—minutes in 2 digits, with leading zeroes as necessary.
tp	A date & time conversion—locale-specific am/pm (lower case).
tm	A date & time conversion—months in 2 digits, with leading zeroes as necessary.
tD	A date & time conversion—date as %tm%td%ty
08	Eight characters in width, with leading zeroes as necessary.
+	Includes sign, whether positive or negative.
,	Includes locale-specific grouping characters.
-	Includes Left-justified.
.3	Three places after decimal point.
10.3	Ten characters in width, right justified, with three places after decimal point.

From:  http://docs.oracle.com/javase/tutorial/java/data/numberformat.html