Java String.format()

External

• http://docs.oracle.com/javase/7/docs/api/java/lang/String.html#format%28java.lang.String,%20java.lang.Object...%29
• Format String syntax http://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax

Internal

• java Format
• SimpleDateFormat
• DecimalFormat
• MessageFormat

!!!Samples

!!!String

{{{ String arg = "blah" String.format("%1$-50s", arg); }}}

This formats the first argument (%1$) as a string "s", to occupy at least 50 characters (width) and it left-justifies it ("-").

For general argument types, the precision is the maximum number of characters to be written to the output.

!!!Floating Point

For the floating-point conversions 'e', 'E', and 'f' the precision is the number of digits after the decimal separator. The conversion is done with rounding:

{{{ double arg = 77.999 String.format("%1$.2f", arg); }}}

will display "78.00"

!!!Integer

{{{ int arg = 77 String.format("%1$3d", arg); }}}

will display " 77"

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