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Thread: Random Number problem

  1. #1
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    Default Random Number problem

    This is my code:

        public background()
        {    
            super(8, 8, 60);
            setBackground("cell.jpg");
            maakland();
            maakdijk();
            maakWater();
        }
        public void maakland()
        {
            land[] land = new land[16];
            int b = 0;
     
            for (int y = 6; y < 8;){
     
                for (int x = 0; x < 8;){
     
                    land[b] = new land();
                    addObject(land[b], x, y);
                    ++x;
                    ++b;
                }
                ++y;
            }
        }
        public void maakdijk()
        {
            dijk[] dijk = new dijk[24];
            int b = 0;
     
            for (int y = 3; y < 6;){
                for (int x = 0; x < 8;){
     
                    dijk[b] = new dijk();
                    addObject(dijk[b], x, y);
                    ++x;
                    ++b;
                }
                ++y;
            }
        }
        public void maakWater()
        {
            Water[] Water = new Water[32];
            int b = 0;
     
            for (int y = 0; y < 3;){
                for (int x = 0; x < 8;){
     
                    Water[b] = new Water();
                    addObject(Water[b], x, y);
                    ++x;
                    ++b;
                }
                ++y;
            }
        }
        public void randomWater(int howMany)
        {
            for(int i=0; i<howMany; i++) {
               Water water = new Water();
                int x = Greenfoot.getRandomNumber(8);
                int y = Greenfoot.getRandomNumber(8);
            }
        }
    }

    As my backgrond i have the first 3 lines: Water second 3 lines: Dike (that needs to turn to water after playing the animation). third 2 lines: Land.

    As you can see i made the background but like i said i want the dike (dijk) to turn into water using randomnumber.. or getoneobjectatoffset..
    Any idea how i can do this?


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Random Number problem

    i want the dike (dijk) to turn into water using randomnumber
    If there are n lines that are dike, you want to randomly select one of those lines and change it to water.
    Assign the lines a number from 0 to n-1 and use the Random number generator to randomly generate a number in that range. See the API doc of the Random class for methods that will do that.
    If you don't understand my answer, don't ignore it, ask a question.

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