Java 删除多行冻结JTable
我试图删除一个Jtable中的多行（每个示例，50行中的5行），但我一次只能删除一行（在您询问之前，我使用了多个间隔选择！），我觉得Jtable有点冻结。我的删除按钮：Java 删除多行冻结JTable,java,swing,model,jtable,Java,Swing,Model,Jtable,我试图删除一个Jtable中的多行（每个示例，50行中的5行），但我一次只能删除一行（在您询问之前，我使用了多个间隔选择！），我觉得Jtable有点冻结。我的删除按钮： deleteButton.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent e){
deleteButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e){
SwingUtilities.invokeLater(new Runnable() {
public void run(){
int[] selectedRow = jTable.getSelectedRows();
for(int j=0; j<selectedRow.length; j++){
Boolean state= (Boolean)jTable.getValueAt(selectedRow[j],10);
if(state==true){//deleta the row
User u=model.getUsers(selectedRow[j]);
new UserDao().delete(u);
model.remove(selectedRow[j]);
numberField.setText(String.valueOf(model.getRowCount()));
}
}
}
});
}
});
我做错了什么 让我们仔细看看代码
deleteButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e){
// Don't know why you need to use invokeLater
// The event should be trigged within the EDT if the user
// clicked the button. This may introduce a small "pause"
// depending on what else is in the EDT...
SwingUtilities.invokeLater(new Runnable() {
public void run(){
// Get the indices of the selected rows...okay
int[] selectedRow = jTable.getSelectedRows();
// Loop through the selected rows...good...
for(int j=0; j<selectedRow.length; j++){
// Get the "state" of the row...okay
Boolean state= (Boolean)jTable.getValueAt(selectedRow[j],10);
// Long winded if, but okay...
if(state==true){//deleta the row
// Don't know what's going on here,
// But I assume you are trying to delete
// something from some kind of database
// THIS is likely to chew up some time...
User u=model.getUsers(selectedRow[j]);
new UserDao().delete(u);
// Uh oh...
// If you remove a row from the model, the list of indices you
// have is now invalid, as they no longer point
// to the correct rows in the model
model.remove(selectedRow[j]);
numberField.setText(String.valueOf(model.getRowCount()));
}
}
}
});
}
});
操作方法的内容
int[] selectedRow = jTable.getSelectedRows();
List<User> usersToBeRemoved = new ArrayList<>(selectedRow.length);
for(int row : selectedRow){
// Is state part of the User object??
Boolean state = (Boolean)jTable.getValueAt(row,10);
if(state){
usersToBeRemoved.add(model.getUsers(row));
}
}
DeleteUsersWorker worker = new DeleteUsersWorker(model, users);
worker.execute();
更新了其他示例
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingWorker;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.AbstractTableModel;
public class TableDeleteRowsTest {
public static void main(String[] args) {
new TableDeleteRowsTest();
}
public TableDeleteRowsTest() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
final UserTableModel model = new UserTableModel(
new User("Kermit"),
new User("Fozzie"),
new User("Animal"),
new User("Miss Piggy"),
new User("Gonzo"),
new User("Beaker"),
new User("Crazy Harry"),
new User("Floyd Pepper"),
new User("Sweetums"));
final JTable table = new JTable(model);
JButton delete = new JButton("Delete");
delete.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
int[] selectedRows = table.getSelectedRows();
if (selectedRows.length > 0) {
List<User> users = new ArrayList<>(selectedRows.length);
for (int row : selectedRows) {
int modelRow = table.convertRowIndexToModel(row);
Boolean selected = (Boolean) model.getValueAt(modelRow, 1);
if (selected) {
users.add(model.getUser(modelRow));
}
}
if (users.size() > 0) {
new DeleteUserWorker(users, model).execute();
}
}
}
});
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new JScrollPane(table));
frame.add(delete, BorderLayout.SOUTH);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class DeleteUserWorker extends SwingWorker<List<User>, User> {
private List<User> users;
private UserTableModel model;
public DeleteUserWorker(List<User> users, UserTableModel model) {
this.users = users;
this.model = model;
}
@Override
protected void process(List<User> chunks) {
for (User user : users) {
model.remove(user);
}
}
@Override
protected List<User> doInBackground() throws Exception {
for (User user : users) {
// Simulated delay
Thread.sleep(250);
publish(user);
}
return users;
}
}
public class UserTableModel extends AbstractTableModel {
private List<User> users;
private List<Boolean> selected;
public UserTableModel(User... users) {
this.users = new ArrayList<>(Arrays.asList(users));
selected = new ArrayList<>(this.users.size());
for (User user : this.users) {
selected.add(new Boolean(false));
}
}
public User getUser(int row) {
return users.get(row);
}
@Override
public int getRowCount() {
return users.size();
}
@Override
public int getColumnCount() {
return 2;
}
@Override
public String getColumnName(int column) {
String name = "?";
switch (column) {
case 0:
name = "User";
break;
case 1:
name = "";
break;
}
return name;
}
@Override
public Class getColumnClass(int column) {
Class type = String.class;
switch (column) {
case 0:
type = String.class;
break;
case 1:
type = Boolean.class;
break;
}
return type;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
Object value = null;
switch (columnIndex) {
case 0:
value = users.get(rowIndex).getName();
break;
case 1:
value = selected.get(rowIndex);
break;
}
return value;
}
@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
return columnIndex == 1;
}
@Override
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
switch (columnIndex) {
case 1:
if (aValue instanceof Boolean) {
selected.set(rowIndex, (Boolean) aValue);
fireTableCellUpdated(rowIndex, columnIndex);
}
break;
}
}
public void remove(User user) {
int index = users.indexOf(user);
if (index >= 0) {
selected.remove(index);
users.remove(user);
fireTableRowsDeleted(index, index);
}
}
}
public class User {
private String name;
public User(String name) {
this.name = name;
}
public String getName() {
return name;
}
}
}
上面的示例将仅删除已标记和选定的行。要删除所有标记行，您需要更像
JButton delete = new JButton("Delete");
delete.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
List<User> users = new ArrayList<>(selectedRows.length);
for (int row = 0; row < table.getRowCount(); row++) {
int modelRow = table.convertRowIndexToModel(row);
Boolean selected = (Boolean) model.getValueAt(modelRow, 1);
if (selected) {
users.add(model.getUser(modelRow));
}
}
if (users.size() > 0) {
new DeleteUserWorker(users, model).execute();
}
}
});
JButton delete=新的JButton（“delete”）；
delete.addActionListener（新ActionListener（）{
@凌驾
已执行的公共无效操作（操作事件e）{
列表用户=新的ArrayList（selectedRows.length）；
对于（int row=0；row0）{
新建DeleteUserWorker（用户，模型）.execute（）；
}
}
});
如果它冻结，则进行线程转储，查看实际阻塞或发生的情况。请编辑您的问题以包含显示模型的remove（）
方法。它略微冻结。如果我选择五个复选框并按下DEL按钮，则仅删除第一个选定的，其他人都被标记了。我上面的代码中有一些错误？如果我没有stacktrace，你如何在eclipse中进行线程转储？祝你一切顺利，如果需要的话。@trashgod是的，想过要提到这一点，但我想我可能只是增加了可怜的OP的困惑…程序员，我只是试着调用器看看是否发生了什么事，但是没有改变任何东西…你的方法看起来很平滑。我只是不明白你的模型。删除（用户）。。。我的用户只是一个bean，最后一个字段是布尔值，因为它是我的tablemodel中的一个复选框，我在其中获取每个用户。我使用remove（int position），因为我从列表中获取/删除它。最重要的是。基本上，我们的想法是，提供一些方法，使表模型能够在表模型中找到指定的用户
对象，这将为您提供索引，并允许您在内部更新模型，因为它是唯一不可能更改的可行值，例如，与索引不同。因为你可以做model.getUsers（i）
（其中，i
是一个行索引），我假设你已经有了这个功能…疯狂，我正在尝试你的方法。但是我总是得到ArrayIndexOutOfBoundsException:8在那一行：Boolean state=（Boolean）jTable.getValueAt（selectedRow[row]，10）；即使我在复选框中只选择了一行，也会发生这种情况！
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingWorker;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.AbstractTableModel;
public class TableDeleteRowsTest {
public static void main(String[] args) {
new TableDeleteRowsTest();
}
public TableDeleteRowsTest() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
final UserTableModel model = new UserTableModel(
new User("Kermit"),
new User("Fozzie"),
new User("Animal"),
new User("Miss Piggy"),
new User("Gonzo"),
new User("Beaker"),
new User("Crazy Harry"),
new User("Floyd Pepper"),
new User("Sweetums"));
final JTable table = new JTable(model);
JButton delete = new JButton("Delete");
delete.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
int[] selectedRows = table.getSelectedRows();
if (selectedRows.length > 0) {
List<User> users = new ArrayList<>(selectedRows.length);
for (int row : selectedRows) {
int modelRow = table.convertRowIndexToModel(row);
Boolean selected = (Boolean) model.getValueAt(modelRow, 1);
if (selected) {
users.add(model.getUser(modelRow));
}
}
if (users.size() > 0) {
new DeleteUserWorker(users, model).execute();
}
}
}
});
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new JScrollPane(table));
frame.add(delete, BorderLayout.SOUTH);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class DeleteUserWorker extends SwingWorker<List<User>, User> {
private List<User> users;
private UserTableModel model;
public DeleteUserWorker(List<User> users, UserTableModel model) {
this.users = users;
this.model = model;
}
@Override
protected void process(List<User> chunks) {
for (User user : users) {
model.remove(user);
}
}
@Override
protected List<User> doInBackground() throws Exception {
for (User user : users) {
// Simulated delay
Thread.sleep(250);
publish(user);
}
return users;
}
}
public class UserTableModel extends AbstractTableModel {
private List<User> users;
private List<Boolean> selected;
public UserTableModel(User... users) {
this.users = new ArrayList<>(Arrays.asList(users));
selected = new ArrayList<>(this.users.size());
for (User user : this.users) {
selected.add(new Boolean(false));
}
}
public User getUser(int row) {
return users.get(row);
}
@Override
public int getRowCount() {
return users.size();
}
@Override
public int getColumnCount() {
return 2;
}
@Override
public String getColumnName(int column) {
String name = "?";
switch (column) {
case 0:
name = "User";
break;
case 1:
name = "";
break;
}
return name;
}
@Override
public Class getColumnClass(int column) {
Class type = String.class;
switch (column) {
case 0:
type = String.class;
break;
case 1:
type = Boolean.class;
break;
}
return type;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
Object value = null;
switch (columnIndex) {
case 0:
value = users.get(rowIndex).getName();
break;
case 1:
value = selected.get(rowIndex);
break;
}
return value;
}
@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
return columnIndex == 1;
}
@Override
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
switch (columnIndex) {
case 1:
if (aValue instanceof Boolean) {
selected.set(rowIndex, (Boolean) aValue);
fireTableCellUpdated(rowIndex, columnIndex);
}
break;
}
}
public void remove(User user) {
int index = users.indexOf(user);
if (index >= 0) {
selected.remove(index);
users.remove(user);
fireTableRowsDeleted(index, index);
}
}
}
public class User {
private String name;
public User(String name) {
this.name = name;
}
public String getName() {
return name;
}
}
}
JButton delete = new JButton("Delete");
delete.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
List<User> users = new ArrayList<>(selectedRows.length);
for (int row = 0; row < table.getRowCount(); row++) {
int modelRow = table.convertRowIndexToModel(row);
Boolean selected = (Boolean) model.getValueAt(modelRow, 1);
if (selected) {
users.add(model.getUser(modelRow));
}
}
if (users.size() > 0) {
new DeleteUserWorker(users, model).execute();
}
}
});