question: private String printOFormat ( long x ) { String sx = null ; if ( x == Long . MIN_VALUE ) sx = "1000000000000000000000" ; else if ( x < 0 ) { String t = Long . toString ( ( ~ ( - x - 1 ) ) ^ Long . MIN_VALUE , 8 ) ; switch ( t . length ( ) ) { case 1 : sx = "100000000000000000000" + t ; break ; case 2 : sx = "10000000000000000000" + t ; break ; case 3 : sx = "1000000000000000000" + t ; break ; case 4 : sx = "100000000000000000" + t ; break ; case 5 : sx = "10000000000000000" + t ; break ; case 6 : sx = "1000000000000000" + t ; break ; case 7 : sx = "100000000000000" + t ; break ; case 8 : sx = "10000000000000" + t ; break ; case 9 : sx = "1000000000000" + t ; break ; case 10 : sx = "100000000000" + t ; break ; case 11 : sx = "10000000000" + t ; break ; case 12 : sx = "1000000000" + t ; break ; case 13 : sx = "100000000" + t ; break ; case 14 : sx = "10000000" + t ; break ; case 15 : sx = "1000000" + t ; break ; case 16 : sx = "100000" + t ; break ; case 17 : sx = "10000" + t ; break ; case 18 : sx = "1000" + t ; break ; case 19 : sx = "100" + t ; break ; case 20 : sx = "10" + t ; break ; case 21 : sx = "1" + t ; break ; } } else sx = Long . toString ( x , 8 ) ; return printOFormat ( sx ) ; }
target:  Format method for the o conversion character and long argument. <p/> For o format, the flag character '-', means that the output should be left justified within the field.  The default is to pad with blanks on the left.  The '#' flag character means that the output begins with a leading 0 and the precision is increased by 1. <p/> The field width is treated as the minimum number of characters to be printed.  The default is to add no padding.  Padding is with blanks by default. <p/> The precision, if set, is the minimum number of digits to appear.  Padding is with leading 0s.