2021年1月29~30日 Java集合、迭代器、泛型

class Employee{
    String name;
    boolean isMale;
    double money;
    Employee(String name,boolean isMale,double money){
        this.name = name;
        this.isMale = isMale;
        this.money = money;
    }
}

public class Main {
    
    public static void main(String[] args){
        Collection<Employee> company = new ArrayList<Employee>();
        
        company.add(new Employee("Tom",true,500));
        company.add(new Employee("Bruce",true,40));
        company.add(new Employee("Alice",false,123));
        company.add(new Employee("Katy",false,250));
        company.add(new Employee("Eric",true,123));
        
        Iterator<Employee> it = company.iterator();
        
        double sum = 0;
        while(it.hasNext()) {
            Employee temp = it.next();//指针已移动，所以只能定义变量再次取值
            if(temp.isMale) {
                sum+=temp.money;
            }
        }
        System.out.println(sum);
        
    }
}