public class WxAlgorithm{
/**
* @param moneySum 输入总金额
* @param redNum 输入红包数量
*/
private static void wxAlgorithm(double moneySum, int redNum) {
// 设置最小的金额
double moneyMin = 0.01;
Random random = new Random();
//精确小数点2位
NumberFormat formatter = new DecimalFormat("#.##");
for (int i=1;i<redNum;i++)
{
//随机一个数,数值范围在最小值与余额之间
String money = formatter.format(random.nextDouble() * (moneySum - moneyMin) + moneyMin);
//数值转换
moneySum = Double.valueOf(formatter.format(moneySum - Double.valueOf(money)));
System.out.println("第"+i+"个红包:" + money + "元 ,余额:" + moneySum);
}
System.out.println("最后个红包:" + moneySum + "元 ,余额:" + (moneySum - moneySum));
}
public static void main(String[] args) {
wxAlgorithm(10.26, 9);
}
}
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转载自my.oschina.net/u/1758234/blog/505781
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