我现场有点新鲜,我希望你们能帮助我......
我是java编程的初学者,我觉得我对这个问题感到非常满意。
我的程序工作正常,除了一个令我烦恼的小细节。我有一个JTable,第一列上有一个按钮,允许从表中删除该行。它工作得很好,除非我尝试删除表的最后一行,按钮停留在那里然后表冻结,我不能删除任何行,因为我收到“超出范围的异常”。但是,当我使用命令table.getRowCount());
时在删除该行之前和之后,该表“知道”已删除一行但正如我所说,按钮停留在那里。缩略图中的屏幕截图显示了点击“年”单元格旁边按钮之前和之后的情况。
最好补充说我是从表格外的按钮添加表格中的行。
继承我的代码: Main.java
static String [] title = {"X","Nom","SRM","Rend.","%","Kg",};
static Object[][] contenu;
static DefaultTableModel model1 = new DefaultTableModel(contenu, title);
static JTable tableauGrains = new JTable(model1);
tableauGrains.getColumn("X").setCellRenderer(new ButtonRenderer());
tableauGrains.getColumn("X").setCellEditor(new ButtonEditor(new JCheckBox()));
ButtonRenderer.java
import java.awt.Color;
import java.awt.Component;
import javax.swing.JButton;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
public class ButtonRenderer extends JButton implements TableCellRenderer{
public Component getTableCellRendererComponent( JTable table, Object value,
boolean isSelected, boolean isFocus,
int row, int col) {
Color beige = new Color(218, 217, 158);
setBackground(beige);
//On écrit dans le bouton ce que contient la cellule
setText((value != null) ? value.toString() : "");
//on retourne notre bouton
return this;
}
}
ButtonEditor.java
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import javax.swing.DefaultCellEditor;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
public class ButtonEditor extends DefaultCellEditor {
protected JButton button;
private DeleteButtonListener bListener = new DeleteButtonListener();
/**
* Constructeur avec une checkBox
* @param checkBox
* @param count
*/
@SuppressWarnings("deprecation")
public ButtonEditor(JCheckBox checkBox) {
//Par défaut, ce type d'objet travaille avec un JCheckBox
super(checkBox);
//On crée à nouveau notre bouton
button = new JButton();
button.setOpaque(true);
//On lui attribue un listener
button.addActionListener(bListener);
}
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
//On précise le numéro de ligne à notre listener
bListener.setRow(row);
//Idem pour le numéro de colonne
//On passe aussi le tableau en paramètre pour des actions potentielles
bListener.setTable(table);
//On réaffecte le libelle au bouton
button.setText( (value == null) ? "" : value.toString() );
//On renvoie le bouton
return button;
}
class DeleteButtonListener implements ActionListener {
private int row;
private JTable table;
public void setRow(int row){this.row = row;}
public void setTable(JTable table){this.table = table;}
public void actionPerformed(ActionEvent event) {
if(table.getRowCount() > 0){
//On affiche un message
System.out.println("coucou du bouton: "+ ((JButton)event.getSource()).getText() );
((DefaultTableModel)table.getModel()).removeRow(this.row);
((DefaultTableModel)table.getModel()).fireTableDataChanged();
}
}
}
}
我很抱歉法语评论,我的母语。
在删除最后一行之后,似乎JTable本身并没有“刷新”。
我是不是来自联盟?
非常感谢,对于这篇长篇文章感到抱歉,我试图给你最多的信息。
Djosimd 编辑:
删除后尝试单击第11行后执行堆 第12行:
线程“AWT-EventQueue-0”中的异常 java.lang.ArrayIndexOutOfBoundsException:11> = 11 at java.util.Vector.elementAt(未知来源)at javax.swing.table.DefaultTableModel.setValueAt(未知来源)at javax.swing.JTable.setValueAt(未知来源)at javax.swing.JTable.editingStopped(未知来源)at javax.swing.AbstractCellEditor.fireEditingStopped(未知来源)at javax.swing.DefaultCellEditor中的$ EditorDelegate.stopCellEditing(未知 来自)javax.swing.DefaultCellEditor.stopCellEditing(未知 来源)at javax.swing.plaf.basic.BasicTableUI $ Handler.mousePressed(未知 来自)java.awt.AWTEventMulticaster.mousePressed(未知来源) 在java.awt.Component.processMouseEvent(未知来源)at javax.swing.JComponent.processMouseEvent(未知来源)at java.awt.Component.processEvent(未知来源)at java.awt.Container.processEvent(未知来源)at java.awt.Component.dispatchEventImpl(未知来源)at java.awt.Container.dispatchEventImpl(未知来源)at java.awt.Component.dispatchEvent(未知来源)at java.awt.LightweightDispatcher.retargetMouseEvent(未知来源)at java.awt.LightweightDispatcher.processMouseEvent(未知来源)at java.awt.LightweightDispatcher.dispatchEvent(未知来源)at java.awt.Container.dispatchEventImpl(未知来源)at java.awt.Window.dispatchEventImpl(未知来源)at java.awt.Component.dispatchEvent(未知来源)at java.awt.EventQueue.dispatchEventImpl(未知来源)at java.awt.EventQueue.access $ 200(未知来源)at java.awt.EventQueue $ 3.run(未知来源)at java.awt.EventQueue $ 3.run(未知来源)at java.security.AccessController.doPrivileged(Native Method)at java.security.ProtectionDomain $ 1.doIntersectionPrivilege(未知 来源)at java.security.ProtectionDomain $ 1.doIntersectionPrivilege(未知 来自)java.awt.EventQueue $ 4.run(未知来源)at java.awt.EventQueue $ 4.run(未知来源)at java.security.AccessController.doPrivileged(Native Method)at java.security.ProtectionDomain $ 1.doIntersectionPrivilege(未知 来自)java.awt.EventQueue.dispatchEvent(未知来源)at java.awt.EventDispatchThread.pumpOneEventForFilters(未知来源) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) 在java.awt.EventDispatchThread.pumpEventsForHierarchy(未知 来自java.awt.EventDispatchThread.pumpEvents(未知来源) at java.awt.EventDispatchThread.pumpEvents(Unknown Source)at java.awt.EventDispatchThread.run(未知来源)
SSCCE:
import java.awt.*;
import java.awt.event.*;
import javax.swing.table.*;
import javax.swing.*;
public class FooGui {
static String[] title = { "X", "Nom", "SRM", "Rend.", "%", "Kg"};
static Object[][] contenu;
// !! static DefaultTableModel model1 = new DefaultTableModel(contenu, title);
static DefaultTableModel model1 = new DefaultTableModel(title, 0);
static JTable tableauGrains = new JTable(model1);
public static void main(String[] args) {
tableauGrains.getColumn("X").setCellRenderer(new ButtonRenderer());
tableauGrains.getColumn("X").setCellEditor(new ButtonEditor(new JCheckBox()));
for (int i = 0; i < 10; i++) {
String btnText = "Btn " + (i + 1);
Object[] rowData = {btnText, "", "", "", "", ""};
model1.addRow(rowData);
}
JOptionPane.showMessageDialog(null, new JScrollPane(tableauGrains));
}
}
class ButtonRenderer extends JButton implements TableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean isFocus, int row, int col) {
Color beige = new Color(218, 217, 158);
setBackground(beige);
setText((value != null) ? value.toString() : "");
return this;
}
}
class ButtonEditor extends DefaultCellEditor {
protected JButton button;
private DeleteButtonListener bListener = new DeleteButtonListener();
public ButtonEditor(JCheckBox checkBox) {
super(checkBox);
button = new JButton();
button.setOpaque(true);
button.addActionListener(bListener);
}
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
System.out.printf("row is: %d%n", row);
bListener.setRow(row);
bListener.setTable(table);
// On réaffecte le libelle au bouton
button.setText((value == null) ? "" : value.toString());
// On renvoie le bouton
return button;
}
class DeleteButtonListener implements ActionListener {
private int row;
private JTable table;
public void setRow(int row) {
this.row = row;
}
public void setTable(JTable table) {
this.table = table;
}
public void actionPerformed(ActionEvent event) {
if (table.getRowCount() > 0) {
System.out.println("coucou du bouton: " + ((JButton) event.getSource()).getText());
((DefaultTableModel) table.getModel()).removeRow(this.row);
stopCellEditing(); // !! not sure if this will help or not.
//!! ((DefaultTableModel) table.getModel()).fireTableDataChanged();
}
}
}
}
答案 0 :(得分:3)
正如camickr所提到的那样,你忘记在删除行时停止单元格版本,这样就可以继续“编辑”单元格,并在不再存在的行上触发另一行删除(因此索引超出界限)例外)
最后取消按钮的版本。正如camickr所提到的,不需要fireTableDataChanged()
,removeRow()
就可以解决这个问题。
请参阅SSCCE(实际上不是那么短,但我懒得修剪一些线条)进行演示:
import java.awt.Color;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
public class TestJTable {
public class ButtonEditor extends DefaultCellEditor {
protected JButton button;
private final DeleteButtonListener bListener = new DeleteButtonListener();
/**
* Constructeur avec une checkBox
*
* @param checkBox
* @param count
*/
@SuppressWarnings("deprecation")
public ButtonEditor(JCheckBox checkBox) {
// Par défaut, ce type d'objet travaille avec un JCheckBox
super(checkBox);
// On crée à nouveau notre bouton
button = new JButton();
button.setOpaque(true);
// On lui attribue un listener
button.addActionListener(bListener);
}
@Override
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column) {
// On précise le numéro de ligne à notre listener
bListener.setRow(row);
// Idem pour le numéro de colonne
// On passe aussi le tableau en paramètre pour des actions
// potentielles
bListener.setTable(table);
// On réaffecte le libelle au bouton
button.setText(value == null ? "" : value.toString());
// On renvoie le bouton
return button;
}
class DeleteButtonListener implements ActionListener {
private int row;
private JTable table;
public void setRow(int row) {
this.row = row;
}
public void setTable(JTable table) {
this.table = table;
}
@Override
public void actionPerformed(ActionEvent event) {
if (table.getRowCount() > 0) {
// On affiche un message
System.out.println("coucou du bouton: "
+ ((JButton) event.getSource()).getText());
((DefaultTableModel) table.getModel()).removeRow(this.row);
ButtonEditor.this.cancelCellEditing();
}
}
}
}
private static final String[] title = { "X", "Nom", "SRM", "Rend.", "%",
"Kg", };
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new TestJTable().initUI();
}
});
}
protected void initUI() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
DefaultTableModel model = new DefaultTableModel(title, 4);
JTable table = new JTable(model);
table.getColumn("X").setCellEditor(new ButtonEditor(new JCheckBox()));
table.getColumn("X").setCellRenderer(new ButtonRenderer());
frame.add(new JScrollPane(table));
frame.pack();
frame.setVisible(true);
}
public static class ButtonRenderer extends JButton implements
TableCellRenderer {
private static final Color beige = new Color(218, 217, 158);
@Override
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean isFocus, int row,
int col) {
setBackground(beige);
// On écrit dans le bouton ce que contient la cellule
setText(value != null ? value.toString() : "");
// on retourne notre bouton
return this;
}
}
}
答案 1 :(得分:2)
虽然这不能解决您的问题,但请不要调用fireTableDataChanged,这是TableModel的工作。
问题出在TableEditor中。我猜你也不会停止细胞编辑。
结帐Table Button Column。它为您实现渲染器/编辑器。您需要做的就是在单击按钮时提供要调用的Action。