嘿所以我的JTable有问题，当我将模型设置为包含数据的新模型时，它不会更新表。我已经检查过，所有数组中都有数据值，来自另一个类。 cData数组具有所有正确的字符串和值。但它似乎没有更新。这是代码，我评论了我认为它出错的地方：
import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
public class DetentionStats extends JPanel
{
private JLabel title, houseTitle;
private JPanel leftPanel, rightPanel, dormPanel, housePanel, dormButtonPanel, dormStatsPanel, ADormPanel, BDormPanel, CDormPanel, DDormPanel;
private JButton ADorm, BDorm, CDorm, DDorm, Update;
private JTable statsList, houseList;
private JScrollPane statsListScroll, houseListScroll;
private final int numberOfColumns = 4;
private String[] statsColumnNames = {"Name", "Reason"};
private String[] houseColumnNames = {"Name","Reason","Dorm","Completed"};
private ArrayList<Detention> completedDetentions;
private DefaultTableModel statsTable, updateCompleted, houseTable, aDormModel, bDormModel, cDormModel, dDormModel;
public DetentionStats()
{
completedDetentions = new ArrayList<Detention>();
title = new JLabel("Statistics");
title.setFont(new Font("Arial", Font.BOLD, 24));
title.setHorizontalAlignment(JLabel.CENTER);
title.setVerticalAlignment(JLabel.CENTER);
setLayout(new BorderLayout());
ADorm = new JButton("A Dorm");
DormListener aDormListener = new DormListener();
ADorm.addActionListener(aDormListener);
aDormModel = new DefaultTableModel(statsColumnNames, 0);
ADormPanel = new JPanel();
ADormPanel.add(ADorm);
ADormPanel.setPreferredSize(new Dimension(100, 50));
ADormPanel.setBackground(Color.lightGray);
BDorm = new JButton("B Dorm");
DormListener bDormListener = new DormListener();
BDorm.addActionListener(bDormListener);
bDormModel = new DefaultTableModel(statsColumnNames, 0);
BDormPanel = new JPanel();
BDormPanel.add(BDorm);
BDormPanel.setPreferredSize(new Dimension(100, 50));
BDormPanel.setBackground(Color.lightGray);
CDorm = new JButton("C Dorm");
DormListener cDormListener = new DormListener();
CDorm.addActionListener(cDormListener);
cDormModel = new DefaultTableModel(statsColumnNames, 0);
CDormPanel = new JPanel();
CDormPanel.add(CDorm);
CDormPanel.setPreferredSize(new Dimension(100, 50));
CDormPanel.setBackground(Color.lightGray);
DDorm = new JButton("D Dorm");
DormListener dDormListener = new DormListener();
DDorm.addActionListener(dDormListener);
dDormModel = new DefaultTableModel(statsColumnNames, 0);
DDormPanel = new JPanel();
DDormPanel.add(DDorm);
DDormPanel.setPreferredSize(new Dimension(100, 50));
DDormPanel.setBackground(Color.lightGray);
dormButtonPanel = new JPanel();
dormButtonPanel.setLayout(new GridLayout(2,2));
dormButtonPanel.add(ADormPanel);
dormButtonPanel.add(BDormPanel);
dormButtonPanel.add(CDormPanel);
dormButtonPanel.add(DDormPanel);
dormButtonPanel.setBackground(Color.lightGray);
//--------------------------------------------------------------------------------------------------------------------------
statsTable = new DefaultTableModel(statsColumnNames, 0);
statsList = new JTable(statsTable);
statsListScroll = new JScrollPane(statsList);
statsList.setPreferredScrollableViewportSize(new Dimension(470,260));
dormStatsPanel = new JPanel();
dormStatsPanel.add(statsListScroll);
dormStatsPanel.setBackground(Color.lightGray);
dormPanel = new JPanel();
dormPanel.setLayout(new GridLayout(2,1));
dormPanel.add(dormButtonPanel);
dormPanel.add(dormStatsPanel);
//---------------------------------------------------------------------------------------------------------------------------
houseTitle = new JLabel("Completed Detentions");
houseTitle.setFont(new Font("Arial", Font.BOLD, 14));
houseTitle.setHorizontalAlignment(JLabel.CENTER);
houseTitle.setVerticalAlignment(JLabel.CENTER);
Update = new JButton("Update");
UpdateListener uListener = new UpdateListener();
Update.addActionListener(uListener);
houseTable = new DefaultTableModel(houseColumnNames, 0);
houseList = new JTable(houseTable);
houseListScroll = new JScrollPane(houseList);
houseList.setPreferredScrollableViewportSize(new Dimension(470,540));
housePanel = new JPanel();
housePanel.setLayout(new BorderLayout());
housePanel.setBackground(Color.lightGray);
housePanel.add(Update, BorderLayout.EAST);
housePanel.add(houseTitle, BorderLayout.CENTER);
housePanel.add(houseListScroll, BorderLayout.SOUTH);
leftPanel = new JPanel();
leftPanel.add(dormPanel);
leftPanel.setBackground(Color.lightGray);
rightPanel = new JPanel();
rightPanel.add(housePanel);
rightPanel.setBackground(Color.lightGray);
add(title, BorderLayout.NORTH);
add(leftPanel, BorderLayout.WEST);
add(rightPanel, BorderLayout.EAST);
setPreferredSize(new Dimension(1050,670));
setBackground(Color.lightGray);
setVisible(true);
}
public void completeDetention(Detention d)
{
completedDetentions.add(d);
updateCompletedDetentions();
dormSort();
}
private void dormSort()
{
Object[][] dData = new Object[completedDetentions.size()][numberOfColumns];
for(int i = 0; i < completedDetentions.size(); i++)
{
Detention d = completedDetentions.get(i);
if(d.getDorm() == Detention.Dorm.aDorm)
{
dData[i][0] = d.getName();
dData[i][0] = d.getReason();
aDormModel = new DefaultTableModel(dData, statsColumnNames);
}
else if(d.getDorm() == Detention.Dorm.bDorm)
{
dData[i][0] = d.getName();
dData[i][0] = d.getReason();
bDormModel = new DefaultTableModel(dData, statsColumnNames);
}
else if(d.getDorm() == Detention.Dorm.cDorm)
{
dData[i][0] = d.getName();
dData[i][0] = d.getReason();
cDormModel = new DefaultTableModel(dData, statsColumnNames);
}
else if(d.getDorm() == Detention.Dorm.dDorm)
{
dData[i][0] = d.getName();
dData[i][0] = d.getReason();
dDormModel = new DefaultTableModel(dData, statsColumnNames);
}
}
}
private void updateCompletedDetentions()
{
Object[][] cData = new Object[completedDetentions.size()][numberOfColumns];
for(int i = 0; i < completedDetentions.size(); i++)
{
Detention d = completedDetentions.get(i);
//-------------------------------------------
cData[i][0] = d.getName();
//-------------------------------------------
cData[i][1] = d.getReason();
//-------------------------------------------
if(d.getDorm() == Detention.Dorm.aDorm)
{
cData[i][2] = "A Dorm";
}
else if(d.getDorm() == Detention.Dorm.bDorm)
{
cData[i][2] = "B Dorm";
}
else if(d.getDorm() == Detention.Dorm.cDorm)
{
cData[i][2] = "C Dorm";
}
else if(d.getDorm() == Detention.Dorm.dDorm)
{
cData[i][2] = "D Dorm";
}
else
{
cData[i][2] = "No Dorm Selected";
}
//-------------------------------------------
cData[i][3] = new Boolean(true);
}
//this is where it is going wrong (i think)
updateCompleted = new DefaultTableModel(cData, houseColumnNames);
houseList.setModel(updateCompleted);
}
private class UpdateListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
updateCompletedDetentions();
dormSort();
}
}
private class DormListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
Object source = event.getSource();
if(source == ADorm)
{
statsList.setModel(aDormModel);
}
else if(source == BDorm)
{
statsList.setModel(bDormModel);
}
else if(source == CDorm)
{
statsList.setModel(cDormModel);
}
else if(source == DDorm)
{
statsList.setModel(dDormModel);
}
}
}
}
可运行的示例：
public class Table extends JPanel
{
private DefaultTableModel updateTable;
private String[] columnNames = {"Name","Last Name","Location"};
private JTable table;
public Table()
{
defaultTable = new JTable(columnNames, 0);
table = new JTable(defaultTable);
}
public void update()
{
Object[][] data = new Object[array.size()][numberOfColumns];
for(int i = 0; i < array.size(); i++)
{
Detention c = detentionArray.get(i)
data[i][0] = c.getFirstName();
data[i][1] = c.getLastName();
data[i][2] = c.getLocation();
}
updateTable = new DefaultTableModel(data, columnNames);
table.setModel(updateTable);
}
}
答案 0 :(得分：0)
您可能需要在updateCompletedDetentions（）方法中将其用作最后一行。
fireTableDataChanged();