Java根据属性对项目列表求和

public class Project {
    private String name;
    private double amount;

    public Project(String name, double amount) {
        this.name = name;
        this.amount = amount;
    }

    public String getName() {
        return name;
    }

    public double getAmount() {
        return amount;
    }
}

List<Project> projectList = new ArrayList<>();
projectList.add(new Project("项目A", 1000.0));
projectList.add(new Project("项目B", 2000.0));
projectList.add(new Project("项目C", 3000.0));

double sum = 0.0;
for (Project project : projectList) {
    sum += project.getAmount();
}

System.out.println("项目金额总和：" + sum);