问查找随机数并从中找出模式

EN

   public static void main(String[] args)   {
      //jkbeg
       System.out.println("objective in this section is" +
            " to get a random side and then move clockwise around to others");
       int targetx; //these will hold the next cell to use.
       int targety;

//     Part One - get random side to be starting cell
//     n.b. abs(x) == abs(y) means diagnol cell, not a side
//     first get randoms of 0 or 1 into targets. 
//     keep trying randoms until abs() are not equal       
     do {   
         targetx = (int) (Math.round(Math.random()));
         targety = (int) (Math.round(Math.random()));
         System.out.println("rando, not checked yet"+targetx +","+targety);
         System.out.println("abs x "+Math.abs(targetx));
         System.out.println("abs y "+Math.abs(targetx));
     }while(Math.abs(targetx) == (Math.abs(targety))  );
     System.out.println("after check for sides, not corners"+targetx +","+targety);

//Part two - walk around the sides clockwise
         System.out.println("random start cell: "+targetx +","+targety);
     for(int targetCounter=0; targetCounter<4; targetCounter++){         
         if ((targetx==1)&&(targety==0)){targetx=0;targety=1;} //top to right
         if ((targetx==0)&&(targety==1)){targetx=-1;targety=0;} //right to bottom
         if ((targetx==-1)&&(targety==0)){targetx=0;targety=-1;} //bottom to left
         if ((targetx==0)&&(targety==-1)){targetx=1;targety=0;} //left to top
         System.out.println("next cell clockwise: "+targetx +","+targety);
     }
     System.out.println("end  *random side then walk around* here here");
     System.exit(0);
   } // main
      //jkend