out.println(String.format("%,02d", (int)Double.parseDouble("7.01234")));
out.println(String.format("%,01.2f", Double.parseDouble("123456780.01234")));
out.println(String.format("%,01.2f", Double.parseDouble("0.0012")));
out.println(String.format("%1$tY%1$tm%1$td%1$tH%1$tM%1$tS", new java.util.Date()));
out.println(String.format("%1$tY-%1$tm-%1$td %1$tH:%1$tM:%1$tS", new java.util.Date()));
out.println(String.format("%tY%<tm%<td%<tH%<tM%<tS", new java.util.Date()));

07 
123,456,780.01
0.00
20110428124035
2011-04-28 12:40:35 
20110428124035