Produces a specified number of random numbers that are not duplicated within a given range

1  Public classRandomnumber {2     /**3 * Generate a random number with a specified number of repetitions within a given range4      * @parammin within the given range5      * @parammax value in given range6      * @paramnumber generates a random number7      * @return8      */9      Public Static int[] Createrandomnumber (intMinintMaxintNumber ) {Ten         if(Number > max-min + 1 | | number < 1 | | Max <min) { One             return NULL; A         } -         int[] arr =New int[number]; -Random r =NewRandom (); the         intCount = 0; -          while(Count <Number ) { -             intRandomnumber = R.nextint (max-min + 1) +min; -             BooleanFlag =true;//This sentence is very important, can not be written in the while outside, or it is the cycle of death.  +              for(intj = 0; J < number; J + +) { -                 if(Arr[j] = =Randomnumber) { +Flag =false; A                       Break; at                 } -             } -             if(flag) { -Arr[count] =Randomnumber; -count++; -             } in         } -          to         returnarr; +     } -  the      Public Static voidMain (string[] args) { *         int[] arr = Createrandomnumber (4, 10, 7); $          for(inti = 0; i < arr.length; i++) {Panax Notoginseng System.out.println (Arr[i]); -         } the     } +     

Produces a specified number of random numbers that are not duplicated within a given range