Automatic topic applet

Automatic primary topic applet is not difficult, generate random numbers using a random number, a predetermined range and determines the appropriate output to avoid repetition subject, the array of numbers may be used for each output are stored in the array, the generated random next the number of elements in the array and digital comparison can, if repeated a random number is generated again, otherwise output and stored again.

code show as below:

. 1  Package the Test;
 2  
. 3  Import Classes in java.util *. ;
 . 4  
. 5  public  class TestPlus {
 . 6      static Scanner in = new new Scanner (the System.in);
 . 7      public TestPlus () {
 . 8          // the TODO Auto-Generated Stub constructor 
. 9      }
 10      static  int the getNumber () // Get the divisor and the dividend
 . 11      {
 12 is          return ( int ) (Math.random () * + 100. 1 );
 13 is      }
 14      static  intgetKey () // random number of 0 to 3 to represent four operators
 15      {
 16          return ( int ) (Math.random () * 10. 4% );
 . 17      }
 18 is      static  void Output ( int COUNT, int num1, int Key, int num2) // output method
 . 19      {
 20 is          char CH = 0 ;
 21 is          Switch (Key)
 22 is          {
 23 is          Case 0: CH = '+'; BREAK ;
 24          Case . 1: CH = '-'; BREAK ;
 25          Case2: CH = '*'; BREAK ;
 26 is          Case . 3: CH = '/'; BREAK ;
 27          default : BREAK ;
 28          }
 29          of System.out.print (COUNT + "," CH + + + num1 num2 + "=" ) ;
 30      }
 31 is      static  Boolean handle ( int num1, int Key, int num2) // number generated is determined to meet the requirements
 32      {
 33 is          Boolean B = to true ;
 34 is          Switch (Key)
 35          {
 36          Case 0:break;
37         case 1:
38         {
39             if(num1<num2)
40                 b=false;
41         }break;
42         case 2:
43         {
44             if(num1*num2>=100)
45                 b=false;
46         }break;
47         case 3:
48         {
49             if(num1%num2!=0)
50                  B = to false ;
 51 is          } BREAK ;
 52 is          default : BREAK ;
 53 is          }
 54 is          return B;
 55      }
 56 is      public  static  void main (String [] args) {
 57 is          // the TODO Auto-Generated Method Stub 
58          int A [] [] = new new  int [100000] [. 3 ]; // create an array of numbers stored already output
 59          int num1, Key, num2, COUNT =. 1 ;
 60          Boolean in Flag = to true ;
61 is          int R & lt, SUM;
 62 is          SUM = in.nextInt ();
 63 is          R & lt = in.nextInt ();
 64          do 
65          {
 66              Boolean tempFlag = to true ;
 67              num1 = the getNumber ();
 68              Key = getKey ();
 69              num2 = the getNumber ();
 70              iF (COUNT> = 2 )
 71 is                  for ( int I = 0; I <COUNT-. 1; I ++ ) // if the number is determined newly generated and previously subject repeated
 72                      iF (a [I] [ 0] == num1 && a [i ] [1] == key && a [i] [2] ==num2)
73                         {
74                             tempFlag=false;
75                             break;
76                         }
77             if(handle(num1,key,num2)&&tempFlag)
78             {
79                 output(count,num1,key,num2);
80                 a[count-1][0]=num1;a[count-1][1]=key;a[count-1][2]=num2;
81                 if(count%r==0)
82                     System.out.println();
83                 if(count>=sum)
84                     flag=false;
85                 count++;
86             }
87         }while(flag);
88     }
89 
90 }