[英]CustomTableModel + JTable = table isn't filled
我正在尝试实现自己的表模型来显示JTable中的计划。 我实现了它,但表格甚至没有填充。 也许我失去了一些需要实施的方法? 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 "";
}
}
有人能指出我的错误吗? 提前谢谢大家!
ps我不确定是否有必要为Jtable实现setValueAt。 如果我是对的,你有必要展示一下这种方法的实现吗?
实现了setValueAt(),但没有改变:
@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tablemodel结构的图片我怎么看:
我想黄色部分从timeIntervals
列表填充,绿色部分 - 从days
列表和purpule部分 - 从partialSchedule
hashmap填充。
你的AbstractTableModel
缺少重要的setXxx()方法
为什么你使用太硬的方法fireTableStructureChanged();
使用适当的fireXxxXxx()方法 ,此代码示例包含AbstractTableModel
大多数重要方法以及正确的fireXxxXxx()
我会使用DefaultTableModel
基于Vector<Vector<Object>>
,而不是XxxMap
或XxxHashMap
,这样大约需要depest知识JTable
, XxxTableModel
和XxxMap
或XxxHashMap
一起工作
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