java如何将集合转换为数组

Question

我需要一个以数组形式返回日期的函数

下面的getItem()必须以数组形式返回日期

public class Calendar implements Ownable {
    User owner;
    ArrayList<CalendarItem> Termin = new ArrayList<CalendarItem>();

    public Calendar (User owner){
        this.owner = owner; 
    }

    @Override
    public Person getOwner() {
        return owner;
    }
    public CalendarItem [] getItems(){
        return ; //  what should I return here?
    }
}

Answer 1

注意：Termin的名称不正确，变量都应该是camel大小写

public CalendarItem [] getItems(){
    return Termin.toArray(new CalendarItem[Termin.size()]);
}

Answer 2

见Convert ArrayList to String []和toArray

试试这个：

public CalendarItem [] getItems(){
    return Termin.toArray(new CalendarItem[Termin.size()]);
}