java 加权平均

public class WeightedAverageCalculator {
    public static void main(String[] args) {
        double[] values = {80, 90, 70}; // 数值数组
        double[] weights = {0.3, 0.4, 0.3}; // 权重数组
        
        double weightedAverage = calculateWeightedAverage(values, weights);
        System.out.println("加权平均值为：" + weightedAverage);
    }
    
    public static double calculateWeightedAverage(double[] values, double[] weights) {
        if (values.length != weights.length) {
            throw new IllegalArgumentException("数值数组和权重数组长度必须相同！");
        }
        
        double sum = 0;
        double weightSum = 0;
        
        for (int i = 0; i < values.length; i++) {
            sum += values[i] * weights[i];
            weightSum += weights[i];
        }
        
        return sum / weightSum;
    }
}