轮盘赌java算例

博客原文地址为： http://blog.csdn.net/qy20115549/article/details/79635945 #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;
	    }
}