printf how to do floating points with leading zeros

Try this printf (C, Perl, PHP) format string:

"%07.2f"

Here is the code you need:

float myNumber = 43.4;DecimalFormat formatter = new DecimalFormat("0000.00"); //use # for optional digits instead of 0System.out.println(formatter.format(myNumber));

Java: use the Formatter class. Examples of expected usage:

StringBuilder sb = new StringBuilder();// Send all output to the Appendable object sbFormatter formatter = new Formatter(sb, Locale.US);// Explicit argument indices may be used to re-order output.formatter.format("%4$2s %3$2s %2$2s %1$2s", "a", "b", "c", "d")// -> " d  c  b  a"// Optional locale as the first argument can be used to get// locale-specific formatting of numbers.  The precision and width can be// given to round and align the value.formatter.format(Locale.FRANCE, "e = %+10.4f", Math.E);// -> "e =    +2,7183"// The '(' numeric flag may be used to format negative numbers with// parentheses rather than a minus sign.  Group separators are// automatically inserted.formatter.format("Amount gained or lost since last statement: $ %(,.2f",                balanceDelta);// -> "Amount gained or lost since last statement: $ (6,217.58)"