get a fixed-length random string , its a mixture of uppercase , lowercase letters and numbers concode_field_sep String NUMBERS_AND_LETTERS concode_elem_sep String LETTERS concode_elem_sep String CAPITAL_LETTERS concode_elem_sep String LOWER_CASE_LETTERS concode_elem_sep String NUMBERS concode_field_sep String getRandomLetters concode_elem_sep String getRandom concode_elem_sep String getRandom concode_elem_sep int getRandom concode_elem_sep int getRandom concode_elem_sep String getRandomNumbers concode_elem_sep String getRandomCapitalLetters concode_elem_sep String getRandomLowerCaseLetters concode_elem_sep boolean shuffle concode_elem_sep boolean shuffle concode_elem_sep int[] shuffle concode_elem_sep int[] shuffle
String function ( int arg0 ) { return getRandom ( NUMBERS_AND_LETTERS , arg0 ) ; }