在java中传递对象数组并在被调用方法

Question

我写了一些代码来返回一个对象数组。如何在被调用的方法中保存这些对象？

   public Ticket[] getOpenTicket() {
        int ticketcount = 0;
        for (int i = 0; i < ticket.length; i++) {
            if (ticket[i] != null && ticket[i].getResolvedBy() == null) {
                ticketcount = ticketcount + 1;
                // System.out.println("Ticket raised by : " +
                // ticket[i].getTicketno());
            }
        }

        Ticket[] opentickets = new Ticket[ticketcount];
        for (int i = 0; i < ticket.length; i++) {
            if (ticket[i].getResolvedBy() == null) {
                opentickets[i] = ticket[i];
            }
        }
        return opentickets;

    }

这是我调用openticket的被调用函数：

TicketDaoMemImpl tdmi=new TicketDaoMemImpl();
Ticket [] obj1=tdmi.getOpenTicket();

谢谢

Answer 1

不应该看起来更像这样：

public class CheckTicket {
    public Ticket [] openTicket() {
        return arrayOfTickets; // wherever that comes from
    }
}

CheckTicket cc = new CheckTicket();
Ticket[] t1 = cc.openTicket();

Answer 2

在这行代码中

Ticket[] opentickets = new Ticket[ticketcount];
  for (int i = 0; i < ticket.length; i++) {
    if (ticket[i].getResolvedBy() == null) {

票证[i]不能为空吗？似乎这很可能导致您的问题 - 您可以在可能为空引用的地方调用方法。

您应该将循环更改为：

Ticket[] opentickets = new Ticket[ticketcount];
int ticketIndex = 0;
for (int i = 0; i < ticket.length; i++) {
  if (ticket[i] != null && ticket[i].getResolvedBy() == null) {
    opentickets[ticketIndex] = ticket[i];
    ticketIndex++;
  }
}