java - CustomTableModel + JTable = 表未填充

Question

我正在尝试实现我自己的表模型以在 JTable 中显示日程表。我实现了它，但表甚至没有填满。也许我丢失了一些需要实现的方法？这是我的代码:

public class ScheduleTableModel extends AbstractTableModel {

    private ArrayList<TimeInterval> timeIntervals;
    private ArrayList<Day> days;
    private LinkedHashMap<ScheduleSlot, Lesson> fullSchedule;
    private LinkedHashMap<ScheduleSlot, Lesson> partialSchedule;
    private ScheduleType scheduleType;


    public ScheduleTableModel(ArrayList<TimeInterval> timeIntervals, ArrayList<Day> days, LinkedHashMap<ScheduleSlot, Lesson> fullSchedule, LinkedHashMap<ScheduleSlot, Lesson> partialSchedule) {
        this.timeIntervals = timeIntervals;
        this.days = days;
        this.fullSchedule = fullSchedule;
        this.partialSchedule = partialSchedule;
        this.scheduleType = ScheduleType.PARTIAL;
        fireTableStructureChanged();
    }

    public ScheduleTableModel(LinkedHashMap<ScheduleSlot, Lesson> fullSchedule) {
        this.fullSchedule = fullSchedule;
        this.scheduleType = ScheduleType.GENERAL;
        fireTableStructureChanged();
    }

    @Override
    public int getRowCount() {
        if (scheduleType == ScheduleType.PARTIAL) {
            return timeIntervals.size() + 1;
        } else {
            return fullSchedule.size();
        }
    }

    @Override
    public int getColumnCount() {
        if (scheduleType == ScheduleType.PARTIAL) {
            return days.size() + 1;
        } else {
            return 3;
        }
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        if (scheduleType == ScheduleType.PARTIAL) {
            if (columnIndex > 0 && rowIndex > 0) {
                for (Map.Entry<ScheduleSlot, Lesson> entry : partialSchedule.entrySet()) {
                    if (entry.getKey().getDay().equals(getColumnDay(columnIndex)) && entry.getKey().getTime().equals(getRowTimeInterval(rowIndex))) {
                        return entry;
                    }
                }
            } else if (rowIndex == 0 && columnIndex > 0) {
                return days.get(columnIndex);
            } else if (columnIndex == 0 && rowIndex > 0) {
                return timeIntervals.get(rowIndex);
            } else if (rowIndex == 0 && columnIndex == 0) {
                return "";
            }
        } else {
            List<Map.Entry<ScheduleSlot, Lesson>> scheduleIterator = new ArrayList<Map.Entry<ScheduleSlot, Lesson>>(fullSchedule.entrySet());
            switch (columnIndex) {
                case 0: {
                    scheduleIterator.get(columnIndex).getKey().getTimeSlot();
                }
                case 1: {
                    scheduleIterator.get(columnIndex).getKey().getPlaceSlot();
                }
                case 2: {
                    scheduleIterator.get(columnIndex).getValue();
                }
            }
        }
        return "";
    }

    @Override
    public boolean isCellEditable(int rowIndex, int columnIndex) {
        return false;
    }

    public Day getColumnDay(int columnIndex) {
        return (Day) getValueAt(0, columnIndex);
    }

    public TimeInterval getRowTimeInterval(int rowIndex) {
        return (TimeInterval) getValueAt(rowIndex, 0);
    }

    @Override
    public Class getColumnClass(int columnIndex) {
        if (scheduleType == ScheduleType.GENERAL) {
            switch (columnIndex) {
                case 0: {
                    return fullSchedule.entrySet().iterator().next().getKey().getTimeSlot().getClass();
                }
                case 1: {
                    return fullSchedule.entrySet().iterator().next().getKey().getPlaceSlot().getClass();
                }
                case 2: {
                    return fullSchedule.entrySet().iterator().next().getValue().getGroup().getClass();
                }
                case 3: {
                    return fullSchedule.entrySet().iterator().next().getValue().getProfessor().getClass();
                }
                case 4: {
                    return fullSchedule.entrySet().iterator().next().getValue().getCourse().getClass();
                }

            }
        } else {
            return String.class;
        }
        return String.class;
    }

    @Override
    public String getColumnName(int column) {
        if (scheduleType == ScheduleType.GENERAL) {
            switch (column) {
                case 0: {
                    return "";
                }
                case 1: {
                    return "";
                }
                case 2: {
                    return "";
                }
                case 3: {
                    return "";
                }
                case 4: {
                    return "";
                }
            }
        }
        return "";
    }
}  

有人可以指出我的错误吗？提前谢谢大家!

附注我不确定是否有必要为填充的 Jtable 实现 setValueAt。如果我是对的并且有必要，您能否展示一个实现此方法的示例？

补充:

实现了 setValueAt()，但没有任何改变:

@Override
    public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
        if (scheduleType == ScheduleType.PARTIAL) {
            Map.Entry<ScheduleSlot, Lesson> entry = (Map.Entry<ScheduleSlot, Lesson>) aValue;
            if (columnIndex > 0 && rowIndex > 0) {
                Day day = getColumnDay(columnIndex);
                TimeInterval timeInterval = getRowTimeInterval(rowIndex);
                TimeInterval entryInterval = entry.getKey().getTime();
                Day entryDay = entry.getKey().getDay();
                if (day.equals(entryDay) && timeInterval.equals(entryInterval)) {
                    fullSchedule.put(new ScheduleSlot(new TimeSlot(entry.getKey().getTime(), entry.getKey().getDay()),
                            new PlaceSlot(entry.getKey().getRoom(), entry.getKey().getBuilding())), entry.getValue());
                }
            } else if (rowIndex == 0 && columnIndex > 0) {
                days.add((Day) aValue);
            } else if (columnIndex == 0 && rowIndex > 0) {
                timeIntervals.add((TimeInterval) aValue);
            }
        }

        fireTableDataChanged();
    }  

这是我所看到的表模型结构的图片:

我想从 timeIntervals 列表中填充黄色部分，从 days 列表中填充绿色部分，从 partialSchedule HashMap 中填充紫色部分。

Answer 1

• 你的 AbstractTableModel缺少 important setXxx() method(s)

• 为什么你用了太难的方法fireTableStructureChanged(); use proper fireXxxXxx()methods , 此代码示例包含 AbstractTableModel 的大部分重要方法使用适当的 fireXxxXxx()

• 我会使用 DefaultTableModel基于 Vector<Vector<Object>>而不是 XxxMap或 XxxHashMap , 这种方式需要关于 JTable 的最深入的知识, XxxTableModel和 XxxMap或 XxxHashMap一起工作