对对象流中的每个字段求和

import java.util.List;

public class ObjectSum {
    public static int sum(List<MyObject> objectList) {
        int sum = 0;
        for (MyObject obj : objectList) {
            sum += obj.getField(); // 假设需要求和的字段为getField()
        }
        return sum;
    }

    public static void main(String[] args) {
        List<MyObject> objectList = // 从对象流中获取对象列表
        int result = sum(objectList);
        System.out.println("Sum: " + result);
    }
}

class MyObject {
    private int field;

    public int getField() {
        return field;
    }

    public void setField(int field) {
        this.field = field;
    }
}