java的格式化輸出, 整數/小數/百分比及位置指定...

備忘一下

@Testpublic void testFmt(){System.out.println(String.format("%1$,d", 12345));System.out.println(String.format("%1$8d", 12345));System.out.println(String.format("%1$08d", 12345));System.out.println(String.format("%1$.3f", 3.1415926));NumberFormat format = NumberFormat.getPercentInstance(Locale.US);format.setMinimumFractionDigits(1);System.out.println(format.format(0.1524));System.out.println(String.format("Second word:%2$s, First word: %1$s, Third  value :%3$.2f", "STR1", "STR2", 3.1415926));} 

輸出結果:

12,345   12345000123453.14215.2%Second word:STR2, First word: STR1, Third  value :3.14