添加Button以创建行并删除以在swing中删除表中的行

Question

我需要一个在标题上添加按钮的Jtable。当点击添加时..然后它必须添加一行包含4列3个文本字段的行并删除按钮。单击删除按钮时，应删除相应的行..提前感谢..

public class UserTableInfo {
private JFrame frame;
private JTable CompTable = null;
private PanelTableModel CompModel = null;
private JButton delButton=null;
private JButton button=null;
public static void main(String args[]) {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (Exception fail) {
}
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new UserTableInfo().makeUI();
}
});    }
public void makeUI() {
CompTable = CreateCompTable();
JScrollPane CompTableScrollpane = new JScrollPane(CompTable,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
JPanel bottomPanel = CreateBottomPanel();
frame = new JFrame("Comp Table Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(CompTableScrollpane, BorderLayout.CENTER);
frame.add(bottomPanel, BorderLayout.SOUTH);
frame.setPreferredSize(new Dimension(800, 400));
frame.setLocation(150, 150);
frame.pack();
frame.setVisible(true);
}public JTable CreateCompTable() {
CompModel = new PanelTableModel();
button=new JButton("Add Row");
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
CompModel.addRow();
}
});        
JTable table = new JTable(CompModel);
table.setRowHeight(new CompCellPanel().getPreferredSize().height);
JTableHeader header = table.getTableHeader();
header.setLayout(new FlowLayout(FlowLayout.TRAILING, 5, 0));
header.add(button);
PanelCellEditorRenderer PanelCellEditorRenderer = new
PanelCellEditorRenderer();
table.setDefaultRenderer(Object.class, PanelCellEditorRenderer);
table.setDefaultEditor(Object.class, PanelCellEditorRenderer);
return table;
}    public JPanel CreateBottomPanel() {
delButton=new JButton("Exit");
delButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae) {
Object source = ae.getSource();
if (source == delButton) {
System.exit(1);
}           
}
});        JPanel panel = new JPanel(new GridBagLayout());
panel.add(delButton);
return panel;
}
}
class PanelCellEditorRenderer extends AbstractCellEditor implements
TableCellRenderer, TableCellEditor {
private static final long serialVersionUID = 1L;
private CompCellPanel renderer = new CompCellPanel();
private CompCellPanel editor = new CompCellPanel();
@Override
public Component getTableCellRendererComponent(JTable table, Object
value, boolean isSelected, boolean hasFocus, int row, int column) {
renderer.setComp((Comp) value);
return renderer;
}
@Override
public Component getTableCellEditorComponent(JTable table, Object
value, boolean isSelected, int row, int column) {
editor.setComp((Comp) value);
return editor;
}
@Override
public Object getCellEditorValue() {
return null;
}
@Override
public boolean isCellEditable(EventObject anEvent) {
return true;
}
@Override
public boolean shouldSelectCell(EventObject anEvent) {
return false;
}
}
class PanelTableModel extends DefaultTableModel {
private static final long serialVersionUID = 1L;
@Override
public int getColumnCount() {
return 1;
}
public void addRow() {
super.addRow(new Object[]{new Comp("")});
}
}
class Comp {
public String upper;
public Comp(String upper) {
this.upper = upper;
}
}
class CompCellPanel extends JPanel {
private static final long serialVersionUID = 1L;
private JLabel label = new JLabel();
private JTextField upperField = new JTextField();
private JButton removeButton = new JButton("remove");
CompCellPanel() {
setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
removeButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JTable table = (JTable)
SwingUtilities.getAncestorOfClass(JTable.class, (Component) e.getSource());
int row = table.getEditingRow();
table.getCellEditor().stopCellEditing();
((DefaultTableModel) table.getModel()).removeRow(row);
}        });
upperField.setMaximumSize(new Dimension(Integer.MAX_VALUE,            upperField.getPreferredSize().height) );
add(upperField);
label.setMaximumSize(getMaximumSize());
add(label);
add(Box.createHorizontalStrut(10));
add(removeButton);
}
public void setComp(Comp Comp) {
upperField.setText(Comp.upper);
}    }

Answer 1

如果您扩展AbstractTableModel并使用它来显示数据，这会容易得多。您可以创建数据的ArrayList并从中添加/删除。更改ArrayList时，TableModel将自动更新表。 ArrayList包含一个类，其中包含连续的所有数据。请参阅Oracle的Java教程示例：http://docs.oracle.com/javase/tutorial/displayCode.html?code=http://docs.oracle.com/javase/tutorial/uiswing/examples/components/TableDemoProject/src/components/TableDemo.java

对于自定义单元格，您可以从TableModel中检测单元格所在的列，并相应地更新其内容。