轮盘赌介绍

算法实现

package test;


public class Test {
    public static double[] multiPros;
    public static void main(String[] args) {
        multiPros = new double[4];
        multiPros[0] = 0.14;
        multiPros[1] = 0.49;
        multiPros[2] = 0.06;
        multiPros[3] = 0.31;
        for (int i = 0; i < 10; i++) {
            int k = nextDiscrete(multiPros);
            System.out.println(k);
        }

    }
     public static int nextDiscrete(double[] probs)
        {
            double sum = 0.0;
            for (int i = 0; i < probs.length; i++)
                sum += probs[i];

            double r = Math.random()  * sum;
            sum = 0.0;
            for (int i = 0; i < probs.length; i++) {
                sum += probs[i];
                if (sum > r)
                    return i;
            }
            return probs.length - 1;
        }
}

结果展示

最后

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