如何在Java中检索数组的引用号？
完成阵列后，我想打印如下内容： 航段-出发时间-始发地-目的地-行程时间 1时间地点地点时间 2.时间地点地点时间 3.时间地点地点时间 我想根据用户输入数组项的顺序，用自动分配的数值打印出数组。我对如何打印阵列对象（时间、地点）有很好的想法，但我不知道如何打印出对应的参考号。我该如何制作这些数字？（点只是占位符，不应该出现在代码中。我只想在列中浮动它。所以不要让我放置空的空格）如何在Java中检索数组的引用号？,java,arrays,Java,Arrays,完成阵列后，我想打印如下内容： 航段-出发时间-始发地-目的地-行程时间 1时间地点地点时间 2.时间地点地点时间 3.时间地点地点时间 我想根据用户输入数组项的顺序，用自动分配的数值打印出数组。我对如何打印阵列对象（时间、地点）有很好的想法，但我不知道如何打印出对应的参考号。我该如何制作这些数字？（点只是占位符，不应该出现在代码中。我只想在列中浮动它。所以不要让我放置空的空格） 我想我可以要求用户提供一个位置，并将该项跟踪到一个引用，然后将该引用添加到数组中，但这会使数字顺序保持静态，我希望它
我想我可以要求用户提供一个位置，并将该项跟踪到一个引用，然后将该引用添加到数组中，但这会使数字顺序保持静态，我希望它们按顺序排列。任何帮助都将不胜感激。谢谢。根据您提供的内容，一个简单的实现是：
List <FlightDetails> flightDetails = new ArrayList<>();
for (FlightDetails aflightDetail : flightDetails) {
System.out.println(aflightDetail.getDepartureTime() + " " +
aflightDetail.getOrigin() //and so on;
}
flightDetails.get(5);
如果您希望根据插入和访问时间进行订购（这样当您访问航班时，它会被放在列表的顶部），您可以使用
LinkedHashMapimport java.util.ArrayList;
import java.util.Calendar;
import java.util.Comparator;
import java.util.Date;
public class SequenceOfArray
{
// Declare an ArrayList of Travel
ArrayList<Travel> travelList = new ArrayList<Travel>();
public static void main(String[] args)
{
SequenceOfArray s = new SequenceOfArray();
s.addInput(0, 4); // add non sequentional input , so that sorting by departTime gives different sequenc
s.addInput(10, 15);
s.addInput(5, 9);
s.travelList.sort(s.compareByDepartTime); // sort travel by departTime
s.print();
s.travelList.sort(s.compareById); // sort by id
s.print();
}
public void print()
{
System.out.println("id_______Leg______________Departure Time___________________________Origin_________Destination_____________Travel Time");
for (int i = 0; i < travelList.size(); i++)
{
Travel t = travelList.get(i);
// print travel, leg is dynamic, as your list is sorted.
System.out.println(t.id + ".........." + i + ".................." + t.departTime + "........" + t.origin + "........." + t.destination + ".............." + t.departTime);
}
}
Comparator<Travel> compareByDepartTime = new Comparator<Travel>()
{
@Override
public int compare(Travel o1, Travel o2)
{
return o1.departTime.compareTo(o2.departTime);
}
};
Comparator<Travel> compareById = new Comparator<Travel>()
{
@Override
public int compare(Travel o1, Travel o2)
{
int i = 0;
if (o1.id - o2.id > 0)
return 1;
if (o1.id - o2.id < 0)
return -1;
return i;
}
};
public void addInput(int start, int end)
{
for (int i = start; i < end; i++)
{
Travel t = new Travel();
t.id = i;
t.departTime = Calendar.getInstance().getTime();
t.origin = "Origin" + (i + 1);
t.destination = "Destination" + (i + 1);
t.travelTime = Calendar.getInstance().getTime();
travelList.add(t);
}
}
}
class Travel
{
long id;
Date departTime;
String origin;
String destination;
Date travelTime;
// getters and setters
}
请添加一些代码片段以便更好地理解您要查找的术语不是“参考号”，而是“索引”。
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Comparator;
import java.util.Date;
public class SequenceOfArray
{
// Declare an ArrayList of Travel
ArrayList<Travel> travelList = new ArrayList<Travel>();
public static void main(String[] args)
{
SequenceOfArray s = new SequenceOfArray();
s.addInput(0, 4); // add non sequentional input , so that sorting by departTime gives different sequenc
s.addInput(10, 15);
s.addInput(5, 9);
s.travelList.sort(s.compareByDepartTime); // sort travel by departTime
s.print();
s.travelList.sort(s.compareById); // sort by id
s.print();
}
public void print()
{
System.out.println("id_______Leg______________Departure Time___________________________Origin_________Destination_____________Travel Time");
for (int i = 0; i < travelList.size(); i++)
{
Travel t = travelList.get(i);
// print travel, leg is dynamic, as your list is sorted.
System.out.println(t.id + ".........." + i + ".................." + t.departTime + "........" + t.origin + "........." + t.destination + ".............." + t.departTime);
}
}
Comparator<Travel> compareByDepartTime = new Comparator<Travel>()
{
@Override
public int compare(Travel o1, Travel o2)
{
return o1.departTime.compareTo(o2.departTime);
}
};
Comparator<Travel> compareById = new Comparator<Travel>()
{
@Override
public int compare(Travel o1, Travel o2)
{
int i = 0;
if (o1.id - o2.id > 0)
return 1;
if (o1.id - o2.id < 0)
return -1;
return i;
}
};
public void addInput(int start, int end)
{
for (int i = start; i < end; i++)
{
Travel t = new Travel();
t.id = i;
t.departTime = Calendar.getInstance().getTime();
t.origin = "Origin" + (i + 1);
t.destination = "Destination" + (i + 1);
t.travelTime = Calendar.getInstance().getTime();
travelList.add(t);
}
}
}
class Travel
{
long id;
Date departTime;
String origin;
String destination;
Date travelTime;
// getters and setters
}
id_______Leg______________Departure Time___________________________Origin_________Destination_____________Travel Time
0..........0..................Sun Oct 04 05:11:51 GST 2015........Origin1.........Destination1..............Sun Oct 04 05:11:51 GST 2015
1..........1..................Sun Oct 04 05:11:51 GST 2015........Origin2.........Destination2..............Sun Oct 04 05:11:51 GST 2015
2..........2..................Sun Oct 04 05:11:51 GST 2015........Origin3.........Destination3..............Sun Oct 04 05:11:51 GST 2015
3..........3..................Sun Oct 04 05:11:51 GST 2015........Origin4.........Destination4..............Sun Oct 04 05:11:51 GST 2015
10..........4..................Sun Oct 04 05:11:51 GST 2015........Origin11.........Destination11..............Sun Oct 04 05:11:51 GST 2015
11..........5..................Sun Oct 04 05:11:51 GST 2015........Origin12.........Destination12..............Sun Oct 04 05:11:51 GST 2015
12..........6..................Sun Oct 04 05:11:51 GST 2015........Origin13.........Destination13..............Sun Oct 04 05:11:51 GST 2015
13..........7..................Sun Oct 04 05:11:51 GST 2015........Origin14.........Destination14..............Sun Oct 04 05:11:51 GST 2015
14..........8..................Sun Oct 04 05:11:51 GST 2015........Origin15.........Destination15..............Sun Oct 04 05:11:51 GST 2015
5..........9..................Sun Oct 04 05:11:51 GST 2015........Origin6.........Destination6..............Sun Oct 04 05:11:51 GST 2015
6..........10..................Sun Oct 04 05:11:51 GST 2015........Origin7.........Destination7..............Sun Oct 04 05:11:51 GST 2015
7..........11..................Sun Oct 04 05:11:51 GST 2015........Origin8.........Destination8..............Sun Oct 04 05:11:51 GST 2015
8..........12..................Sun Oct 04 05:11:51 GST 2015........Origin9.........Destination9..............Sun Oct 04 05:11:51 GST 2015
id_______Leg______________Departure Time___________________________Origin_________Destination_____________Travel Time
0..........0..................Sun Oct 04 05:11:51 GST 2015........Origin1.........Destination1..............Sun Oct 04 05:11:51 GST 2015
1..........1..................Sun Oct 04 05:11:51 GST 2015........Origin2.........Destination2..............Sun Oct 04 05:11:51 GST 2015
2..........2..................Sun Oct 04 05:11:51 GST 2015........Origin3.........Destination3..............Sun Oct 04 05:11:51 GST 2015
3..........3..................Sun Oct 04 05:11:51 GST 2015........Origin4.........Destination4..............Sun Oct 04 05:11:51 GST 2015
5..........4..................Sun Oct 04 05:11:51 GST 2015........Origin6.........Destination6..............Sun Oct 04 05:11:51 GST 2015
6..........5..................Sun Oct 04 05:11:51 GST 2015........Origin7.........Destination7..............Sun Oct 04 05:11:51 GST 2015
7..........6..................Sun Oct 04 05:11:51 GST 2015........Origin8.........Destination8..............Sun Oct 04 05:11:51 GST 2015
8..........7..................Sun Oct 04 05:11:51 GST 2015........Origin9.........Destination9..............Sun Oct 04 05:11:51 GST 2015
10..........8..................Sun Oct 04 05:11:51 GST 2015........Origin11.........Destination11..............Sun Oct 04 05:11:51 GST 2015
11..........9..................Sun Oct 04 05:11:51 GST 2015........Origin12.........Destination12..............Sun Oct 04 05:11:51 GST 2015
12..........10..................Sun Oct 04 05:11:51 GST 2015........Origin13.........Destination13..............Sun Oct 04 05:11:51 GST 2015
13..........11..................Sun Oct 04 05:11:51 GST 2015........Origin14.........Destination14..............Sun Oct 04 05:11:51 GST 2015
14..........12..................Sun Oct 04 05:11:51 GST 2015........Origin15.........Destination15..............Sun Oct 04 05:11:51 GST 2015