我很抱歉提出一个以各种形式被问过很多次的问题，但我还没有找到一个完整的有效答案。我要做的就是将一行附加到表模型中。我尝试过很多不同的方法，但总是遇到类似的问题（或者有时是新的和令人兴奋的问题）。无论如何，当我尝试添加行时，我收到“ArrayIndexOutOfBoundsException”错误。我在下面的代码中标记了发生错误的行。我还包括了我看到的错误和我一直在使用的调试输出。我知道我真的不需要为您在此处看到的内容扩展 DefaultTableModel，但这是一个精简版本，我一直在使用它来追踪错误。
例外：
线程“AWT-EventQueue-0”中的异常 java.lang.ArrayIndexOutOfBoundsException: 2 > 0 at java.util.Vector.insertElementAt(Vector.java:594) at javax.swing.table.DefaultTableModel.insertRow(DefaultTableModel.java:374 ) 在 javax.swing.table.DefaultTableModel.addRow(DefaultTableModel.java:350) 在 javax.swing.table.DefaultTableModel.addRow(DefaultTableModel.java:361) 在 SMC.RoleCard$1.actionPerformed(RoleCard.java:69) 在javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018) 在 javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341) 在 javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) 在 javax.swing .DefaultButtonModel.setPressed(DefaultButtonModel.java:259) 在 javax.swing.plaf.basic.BasicButtonListener。mouseReleased(BasicButtonListener.java:252) at java.awt.Component.processMouseEvent(Component.java:6505) at javax.swing.JComponent.processMouseEvent(JComponent.java:3321) at java.awt.Component.processEvent(Component.java :6270) at java.awt.Container.processEvent(Container.java:2229) at java.awt.Component.dispatchEventImpl(Component.java:4861) at java.awt.Container.dispatchEventImpl(Container.java:2287) at java .awt.Component.dispatchEvent(Component.java:4687) 在 java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832) 在 java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492) 在 java.awt.LightweightDispatcher。 dispatchEvent(Container.java:4422) 在 java.awt.Container.dispatchEventImpl(Container.java:2273) 在 java.awt.Window.dispatchEventImpl(Window.java:2719) 在 java.awt.EventQueue.dispatchEventImpl(EventQueue.java:729) 在 java.awt.EventQueue.access$200(EventQueue.java:103) 在 java.awt.Component.dispatchEvent(Component.java:4687) 在 java .awt.EventQueue$3.run(EventQueue.java:688) at java.awt.EventQueue$3.run(EventQueue.java:686) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1。 doIntersectionPrivilege(ProtectionDomain.java:76) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87) at java.awt.EventQueue$4.run(EventQueue.java:702) at java.awt.EventQueue$4.run( EventQueue.java:700) 在 java.security.AccessController.doPrivileged(Native Method) 在 java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) 在 java.awt.EventQueue。dispatchEvent(EventQueue.java:699) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java :150) 在 java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146) 在 java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) 在 java.awt.EventDispatchThread.run(EventDispatchThread.java:91)pumpEvents(EventDispatchThread.java:146) 在 java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) 在 java.awt.EventDispatchThread.run(EventDispatchThread.java:91)pumpEvents(EventDispatchThread.java:146) 在 java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) 在 java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
调试输出：
There are 2 elements in roleData
roleData has 2 elements
Performing WHILE loop
tableData[0][0] is assigned ECC
tableData[0][1] is assigned 1
Performing WHILE loop
tableData[1][0] is assigned Portal
tableData[1][1] is assigned 2
Called getColumnCount()
Returned 2
tableDate has 2 columns and 2 rows.
Called getColumnCount()
Returned 2
Called getColumnName()
Returned Role
Called getColumnCount()
Returned 2
Called getColumnName()
Returned Sort Order
Called getColumnCount()
Returned 2
arg is :Role Data:
Clicked on Role
Called getColumnClass()
Called getColumnClass()
Called getColumnClass()
Called getColumnClass()
B: There are 2 rows in RoleTableModel
Add was pressed
代码：
package SMC;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.Vector;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
/**
* @author Larry Krigbaum
*/
public class RoleCard
{
public JPanel getRoleCard()
{
final JPanel roleCard = new JPanel();
roleCard.setLayout(new BoxLayout(roleCard, BoxLayout.PAGE_AXIS));
roleCard.setAlignmentX(Component.CENTER_ALIGNMENT);
JPanel role_title = new JPanel();
role_title.add(new JLabel(" "));
role_title.add(new JLabel("Configure SAP Roles"));
role_title.add(new JLabel(" "));
roleCard.add(role_title);
final JPanel role_table = new JPanel();
String[] roleColumnNames = {"Role", "Sort Order"};
ArrayList<Role> roleData = Role.loadRoleData();
System.out.println("There are " + roleData.size() + " elements in roleData");
//ArrayList<Role> roleData = null;
final RoleTableModel roleTableModel = new RoleTableModel(roleColumnNames, roleData);
JTable roleEditTable = new JTable(roleTableModel);
roleEditTable.setAutoCreateRowSorter(true);
//final DefaultTableModel roleTableModel = (DefaultTableModel) roleEditTable.getModel();
//final JTable roleEditTable = getRoleTable();
role_table.add(new JScrollPane(roleEditTable)); // ScrollPane needed to show headers
roleCard.add(role_table);
JPanel buttonPanel = new JPanel();
JButton addButton = new JButton("Add");
addButton.setActionCommand("Add");
JButton deleteButton = new JButton("Delete");
deleteButton.setActionCommand("Delete");
final JButton cancelButton = new JButton("Cancel");
cancelButton.setActionCommand("Cancel");
cancelButton.setEnabled(false);
buttonPanel.add(addButton);
buttonPanel.add(deleteButton);
buttonPanel.add(cancelButton);
roleCard.add(buttonPanel);
addButton.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
System.out.println("B: There are " + roleTableModel.getRowCount() + " rows in RoleTableModel");
System.out.println("Add was pressed");
cancelButton.setEnabled(true);
Object[] newRole = null;
roleTableModel.addRow(newRole);
//Object[] newRole = new Object[] {" ", " "};
System.out.println("A: There are " + roleTableModel.getRowCount() + " rows in RoleTableModel");
//roleTableModel.setRowCount((roleTableModel.getRowCount()) + 1);
System.out.println("B: There are " + roleTableModel.getRowCount() + " rows in RoleTableModel");
roleTableModel.fireTableRowsInserted(roleTableModel.getRowCount(), roleTableModel.getRowCount());
roleTableModel.fireTableDataChanged();
}
});
deleteButton.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
System.out.println("Delete was pressed");
cancelButton.setEnabled(true);
}
});
cancelButton.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
System.out.println("Cancel was pressed");
cancelButton.setEnabled(false);
}
});
return roleCard;
}
class RoleTableModel extends DefaultTableModel
{
private String[] roleColumnNames = {"Role", "Sort Order"};
private Object[][] tableData;
public RoleTableModel(String[] roleColumnNames, ArrayList<Role> roleData)
{
System.out.println("roleData has " + roleData.size() + " elements");
tableData = new Object[roleData.size()][2];
Role role = new Role();
Collections.sort(roleData, Role.MakeComparator);
Iterator rolesOrderByRole = roleData.iterator();
int i = 0;
while (rolesOrderByRole.hasNext())
{
System.out.println("Performing WHILE loop");
role = (Role)rolesOrderByRole.next();
tableData[i][0] = role.xrole;
System.out.println("tableData[" + i + "][0] is assigned " + tableData[i][0]);
tableData[i][1] = role.sortOrder;
System.out.println("tableData[" + i + "][1] is assigned " + tableData[i][1]);
i++;
}
System.out.println("tableDate has " + getColumnCount() + " columns and " + getRowCount() + " rows.");
}
@Override
public int getColumnCount()
{
System.out.println("Called getColumnCount()");
System.out.println("Returned " + roleColumnNames.length);
return roleColumnNames.length;
}
@Override
public int getRowCount()
{
if (tableData == null)
return 0;
return tableData.length;
}
@Override
public String getColumnName(int col)
{
System.out.println("Called getColumnName()");
System.out.println("Returned " + roleColumnNames[col]);
return roleColumnNames[col];
}
@Override
public Object getValueAt(int row, int col)
{
return tableData[row][col];
}
@Override
public Class getColumnClass(int c)
{
System.out.println("Called getColumnClass()");
return getValueAt(0, c).getClass();
}
/*
* Don't need to implement this method unless your table's
* editable.
*/
@Override
public boolean isCellEditable(int row, int col)
{
System.out.println("Called isCellEditable()");
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
return true;
}
/*
* Don't need to implement this method unless your table's
* data can change.
*/
@Override
public void setValueAt(Object value, int row, int col)
{
System.out.println("Called setValueAt()");
tableData[row][col] = value;
fireTableCellUpdated(row, col);
}
}