Question

如何为另一个类的构造函数中的arraylist添加值 Employee.java

public Employee(String name, String job, int age, String email, ArrayList<String> phoneNumbers)
{}

Dataentry.java

public List<Employee> createListEmployees(){
List<Employee> retVal = new ArrayList();
Employee( String name, String job, int age, String email, ArrayList<String> 
phoneNumbers);
retVal.add(new Employee("Bob", "Technician", 33, "bob@bobemail.com",
("555123123","5553213213")));
retVal.add(new Employee("Jane", "Accountant", 33, "jane@mail.com", 
["525123123","5553413213"]));

Answer 1

您需要为电话号码正确构建ArrayList：

List<Employee> retVal = new ArrayList<>();
retVal.add(new Employee("Bob", "Technician", 33, "bob@bobemail.com",
        new ArrayList<>(Arrays.asList("555123123","5553213213"))));

如果要更改构造函数签名以使用List接口类型，事情会变得更简单：

public Employee(String name, String job, int age, String email,
        List<String> phoneNumbers) {

    /* ... */
}

List<Employee> retVal = new ArrayList<>();
retVal.add(new Employee("Bob", "Technician", 33, "bob@bobemail.com",
        Arrays.asList("555123123","5553213213")));

如何从构造函数中添加arraylist的值？

1 个答案: