从JTable删除行 [英] Delete row from JTable
本文介绍了从JTable删除行的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我需要从JTable中删除行.
I need to remove row from JTable.
这是我的代码:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.awt.GridLayout;
import javax.swing.JPanel;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import java.util.ArrayList;
import javax.swing.table.DefaultTableModel;
public class GuiManyComponents implements ItemListener, ActionListener {
public static void main(String[] args) {
new GuiManyComponents();
}
JTextField txtField1;
JTextArea tarMultipleLines;
JButton btnDelete;
JButton btnAdd;
JButton btnEdit;
JButton ok;
JButton cancel;
JTable table = new JTable();
JTextField title;
JTextField description;
JTextField genre;
JTextField director;
JTextField rating;
ArrayList<Movie> movies = new ArrayList<Movie>();
public GuiManyComponents()
{
final JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.setSize(500,700);
frame.setTitle("Text area test");
final JFrame frame1 = new JFrame();
frame1.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE );
frame1.setLayout(new BorderLayout());
frame1.setTitle("Text area test");
final JFrame frame2 = new JFrame();
frame2.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE );
frame2.setLayout(new BorderLayout());
frame2.setTitle("Text area test");
table.getSelectedRow();
//test data
movies.add(new Movie("1ABC", "D", "1", "qq", ""));
movies.add(new Movie("2ABC", "F", "2", "", ""));
movies.add(new Movie("3ABC", "G", "3", "", ""));
updateJTable();
JPanel south = new JPanel(new GridLayout(1, 3));
south.add(btnDelete = new JButton("Delete", new ImageIcon("images\\nocheck.png")));
btnDelete.addActionListener(this);
south.add(btnEdit = new JButton("Change info", new ImageIcon("images\\paste.png")));
btnEdit.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent arg0)
{
frame.setVisible(false);
frame2.setVisible(true);
}
});
south.add(btnAdd = new JButton("Add New", new ImageIcon("images\\add.png")));
btnAdd.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent arg0)
{
frame.setVisible(false);
frame1.setVisible(true);
}
});
JScrollPane scrollPane = new JScrollPane(table); //add scrollpane to table
frame.add(scrollPane, BorderLayout.CENTER);
frame.add(south, BorderLayout.SOUTH);
JPanel down = new JPanel(new GridLayout(1, 2));
down.add(cancel = new JButton("Cancel", new ImageIcon("images\\nocheck.png")));
cancel.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent arg0)
{
frame.setVisible(true);
frame1.setVisible(false);
}
});
down.add(ok = new JButton("Save", new ImageIcon("images\\checkmark.png")));
ok.setPreferredSize(new Dimension(100, 70));
ok.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent arg3)
{
String input = title.getText();
String input2 = genre.getText();
String input3 = description.getText();
String input4 = director.getText();
String input5 = rating.getText();
movies.add(new Movie(input, input2, input3, input4, input5 ));
frame.setVisible(true);
frame1.setVisible(false);
updateJTable();
}});
title = new JTextField(5);
description = new JTextField(5);
director = new JTextField(5);
rating = new JTextField(5);
genre = new JTextField(5);
title.addActionListener(this); // add actionListener
description.addActionListener(this);
rating.addActionListener(this);
genre.addActionListener(this);
director.addActionListener(this);
JPanel north = new JPanel(new GridLayout(5, 2));
north.add(new JLabel("Title: "));
north.add(title);
north.add(new JLabel("Director: "));
north.add(director);
north.add(new JLabel("Description: "));
north.add(description);
north.add(new JLabel("Genre: "));
north.add(genre);
north.add(new JLabel("Rating: "));
north.add(rating);
frame1.add(down, BorderLayout.SOUTH);
frame1.add(north, BorderLayout.NORTH);
frame1.pack();
JPanel apacia = new JPanel(new GridLayout(1, 2));
apacia.add(cancel = new JButton("Cancel", new ImageIcon("images\\nocheck.png")));
cancel.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent arg0)
{
frame.setVisible(true);
frame2.setVisible(false);
}
});
apacia.add(ok = new JButton("Done", new ImageIcon("images\\checkmark.png")));
JPanel virsus = new JPanel(new GridLayout(5, 2));
virsus.add(new JLabel("Title: "));
virsus.add(title);
virsus.add(new JLabel("Director: "));
virsus.add(director);
virsus.add(new JLabel("Description: "));
virsus.add(description);
virsus.add(new JLabel("Genre: "));
virsus.add(rating);
virsus.add(new JLabel("Rating: "));
virsus.add(genre);
frame2.add(virsus, BorderLayout.NORTH);
frame2.add(apacia, BorderLayout.SOUTH);
frame2.pack();
frame.setVisible(true);
frame1.setVisible(false);
frame2.setVisible(false);
}
public void updateJTable()
{
DefaultTableModel model = new DefaultTableModel();
model.setColumnIdentifiers(new String[] { "title", "genre", "description", "director", "rating" });
model.setRowCount(movies.size());
int row = 0;
for (Movie movie : movies) {
model.setValueAt(movie.getTitle(), row, 0);
model.setValueAt(movie.getGenre(), row, 1);
model.setValueAt(movie.getDescription(), row, 2);
model.setValueAt(movie.getDirector(), row, 3);
model.setValueAt(movie.getRating(), row, 4);
row++;
}
table.setModel(model);
}
public void actionPerformed(ActionEvent arg0)
{
}
public void itemStateChanged( ItemEvent event )
{
}
}
我刚刚开始做GUI，这有点困难.
I just now start to do GUI and it is a litle bit hard.
如果您能帮助我，我会很高兴的.
If you could help, I will be very thenksfull.
推荐答案
从表中删除单行很简单.您使用的代码如下:
Deleting a single row from the table is simple. You use code like:
int row = table.getSelectedRow();
DefaultTableModel model = (DefaultTableModel)table.getModel();
model.removeRow( row );
但是，表中选定的行可能与TableModel中的行不匹配，因为您可能正在对表进行排序或过滤.因此，您需要执行一个额外的步骤才能将表中的行转换为模型中的行:
However the selected row in the table may not match the row in the TableModel because you may be sorting or filtering the table. So you need an extra step to convert the row in the table to the row in the model:
int row = table.getSelectedRow();
int modelRow = table.convertRowIndexToModel( row );
DefaultTableModel model = (DefaultTableModel)table.getModel();
model.removeRow( modelRow );
当您想一次删除多行时，它会变得更加混乱.当您删除一行时，TableModel中的所有数据都会移动一行，因此您的索引现在关闭了.
It can get even more confusing when you want to delete multiple rows at one time. As you remove one row all the data in the TableModel shifts by one row so your indexes are now off.
以下是示例代码，向您展示如何从JList和JTable中删除多行数据:
Following is example code that shows you how to remove multiple rows of data from a JList and a JTable:
import java.awt.*;
import java.awt.event.*;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.swing.*;
import javax.swing.table.*;
public class ItemDeletion extends JPanel
{
private JList<String> list;
private JTable table;
public ItemDeletion()
{
setLayout( new BorderLayout(5, 5) );
String[] items =
{
"One",
"Two",
"Three",
"Four",
"Five",
"Six",
"Seven",
"Eight",
"Nine",
"Ten"
};
// Add the list
DefaultListModel<String> listModel = new DefaultListModel<String>();
for (String item: items)
listModel.addElement( item );
list = new JList<String>( listModel );
JButton listDelete = new JButton( "Delete From List" );
listDelete.addActionListener( new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
DefaultListModel model = (DefaultListModel)list.getModel();
int row = list.getSelectedIndex();
while (row != -1)
{
model.removeElementAt( row );
row = list.getSelectedIndex();
}
}
});
JPanel listPanel = new JPanel( new BorderLayout(5, 5) );
listPanel.add(new JScrollPane( list ), BorderLayout.CENTER);
listPanel.add(listDelete, BorderLayout.PAGE_END);
// Add the table
DefaultTableModel tableModel = new DefaultTableModel(0, 1);
List<String> tableItems = Arrays.asList( items );
Collections.shuffle( tableItems );
for (String item: tableItems)
{
System.out.println( item );
tableModel.addRow( new String[]{item} );
}
table = new JTable( tableModel );
table.setAutoCreateRowSorter(true);
((DefaultRowSorter)table.getRowSorter()).toggleSortOrder(0);
JButton tableDelete = new JButton( "Delete From Table" );
tableDelete.addActionListener( new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
DefaultTableModel model = (DefaultTableModel)table.getModel();
int row = table.getSelectedRow();
while (row != -1)
{
int modelRow = table.convertRowIndexToModel( row );
model.removeRow( modelRow );
row = table.getSelectedRow();
}
}
});
JPanel tablePanel = new JPanel( new BorderLayout(5, 5) );
tablePanel.add(new JScrollPane( table ), BorderLayout.CENTER);
tablePanel.add(tableDelete, BorderLayout.PAGE_END);
add(listPanel, BorderLayout.LINE_START);
add(tablePanel, BorderLayout.LINE_END);
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("Multiple Item Deletion");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new ItemDeletion(), BorderLayout.NORTH);
frame.setLocationByPlatform( true );
frame.pack();
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
}
}
这篇关于从JTable删除行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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