当我尝试从Java表中删除行时遇到一些问题。特别是,我使用DefaultTableModel,并且当我尝试删除该行时,使用removeRow(introw)方法,无论是什么,都将删除最后一行row。例如,假设我们有六行。当removeRow(0)或removeRow(2)或removeRow(5)叫,最后一行是始终去除。任何想法,为什么会这样?
DefaultTableModel
removeRow(introw)
row
removeRow(0)
removeRow(2)
removeRow(5)
谢谢
-更新
当按下jtable的特定单元格时,应删除相应的行。
class TagsTableMA extends MouseAdapter { @Override public void mousePressed(MouseEvent e){ Point p = e.getPoint(); int row = tagsJT.rowAtPoint(p); int column = tagsJT.columnAtPoint(p); if (column == COLUMN_DELETE_TAG){ DocDialog docDialog = new DocDialog(parentMainJF, true, null, "Please confirm...", "Are you sure you want to delete the \"" + tagsJT.getValueAt(row, COLUMN_TAG_NAME) + "\" tag?", DocDialog.TYPE_YES_NO); docDialog.show(); int answer = docDialog.getAnswer(); if (answer == DocDialog.YES) model.removeRow(row); } } }
-–更新2号这是我的问题的一些代码。我删除了一些不相关的内容。
import java.awt.Point; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.JFrame; import javax.swing.JTable; import javax.swing.table.DefaultTableModel; public class MainJF extends JFrame { public MainJF(){ this.add(createTagsTable()); setMinimumSize(new java.awt.Dimension(200,400)); } private JTable createTagsTable(){ String[] columnNames = {"", "Tag", "", "", ""}; Object[][] data = new Object[10][columnNames.length]; for (int i=0; i<data.length; i++){ data[i][COLUMN_CHECK] = false; data[i][COLUMN_TAG_NAME] = "Tag " + i; data[i][COLUMN_TAG_ID] = i; data[i][COLUMN_EDIT_TAG] = "edit"; data[i][COLUMN_DELETE_TAG] = "delete"; } model = new TagsSelectionTableModel(columnNames, data); tagsJT = new JTable(model); tagsJT.setRowSelectionAllowed(true); tagsJT.addMouseListener(new TagsTableMA()); return tagsJT; } class TagsSelectionTableModel extends DefaultTableModel{ public TagsSelectionTableModel(String[] columnNames, Object[][] data){ super(data, columnNames); this.columnNames = columnNames; this.data = data; } private String[] columnNames; private Object[][] data; @Override public Object getValueAt(int row, int col) { return data[row][col]; } } class TagsTableMA extends MouseAdapter{ @Override public void mousePressed(MouseEvent e){ Point p = e.getPoint(); int row = tagsJT.rowAtPoint(p); int column = tagsJT.columnAtPoint(p); if (column == COLUMN_DELETE_TAG){ int irow = tagsJT.convertRowIndexToView(row); model.removeRow(irow); } } } private JTable tagsJT; private TagsSelectionTableModel model; private static int COLUMN_CHECK = 0; private static int COLUMN_TAG_NAME = 1; private static int COLUMN_TAG_ID = 2; private static int COLUMN_EDIT_TAG = 3; private static int COLUMN_DELETE_TAG = 4; public static void main(String args[]) { new MainJF().setVisible(true); } }
所述row从得到的columnAtPoint()是在 图 坐标,而removeRow()假定 模型 坐标。引用相关教程部分:
columnAtPoint()
removeRow()
除非通过排序,过滤或用户对列的操作重新排列了查看的数据,否则区别并不重要。
如果是这样,您将需要使用convertRowIndexToModel()在 排序和过滤 末尾介绍的,它建议:
convertRowIndexToModel()
使用分类器时,请始终记住要转换单元格坐标。
另外,请考虑使用ListSelectionListener代替MouseAdapter。
ListSelectionListener
MouseAdapter
附录:您的实现getValueAt()继续访问提供给构造函数的数组,而模型的数据实际上存储在父实现中。如果你真的需要在模型的数据结构的更多控制,扩展AbstractTableModel
getValueAt()
AbstractTableModel
import java.awt.EventQueue; import java.awt.Point; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.DefaultTableModel; /** @see https://stackoverflow.com/a/11237205/230513 */ public class MainJF extends JFrame { private JTable tagsJT; private TagsSelectionTableModel model; private static int COLUMN_CHECK = 0; private static int COLUMN_TAG_NAME = 1; private static int COLUMN_TAG_ID = 2; private static int COLUMN_EDIT_TAG = 3; private static int COLUMN_DELETE_TAG = 4; public MainJF() { this.add(new JScrollPane(createTagsTable())); pack(); setLocationRelativeTo(null); setDefaultCloseOperation(EXIT_ON_CLOSE); } private JTable createTagsTable() { String[] columnNames = {"0", "Tag", "2", "3", "4"}; Object[][] data = new Object[10][columnNames.length]; for (int i = 0; i < data.length; i++) { data[i][COLUMN_CHECK] = false; data[i][COLUMN_TAG_NAME] = "Tag " + i; data[i][COLUMN_TAG_ID] = i; data[i][COLUMN_EDIT_TAG] = "edit"; data[i][COLUMN_DELETE_TAG] = "delete"; } model = new TagsSelectionTableModel(columnNames, data); tagsJT = new JTable(model); tagsJT.setRowSelectionAllowed(true); tagsJT.addMouseListener(new TagsTableMA()); return tagsJT; } class TagsSelectionTableModel extends DefaultTableModel { public TagsSelectionTableModel(String[] columnNames, Object[][] data) { super(data, columnNames); } } class TagsTableMA extends MouseAdapter { @Override public void mousePressed(MouseEvent e) { Point p = e.getPoint(); int row = tagsJT.rowAtPoint(p); int col = tagsJT.columnAtPoint(p); if (col == COLUMN_DELETE_TAG) { model.removeRow(row); } } } public static void main(String args[]) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new MainJF().setVisible(true); } }); } }