Java 达人，我最近在捣腾 Jtable，搞得头都大了，还有有论坛各位大神的帮忙。在此先说一声谢谢了！JFrame上有个 “Add”按钮，按下即给 JTable添加一行数据。我想要的效果是，在给 JTable添加一行数据的时候，能够让新增的一行被选中，同时第一个cell处于全选中、可修改状态。如下图所示，新增加的一行为第 3行。十分感谢！
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import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Vector;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.ScrollPaneLayout;
import javax.swing.SwingConstants;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;public class GlobalVari_6 extends JFrame {
private static final long serialVersionUID = 1L; private static double select = 0;
private static int rowIndex = 0; public JTable table = null; // 表格方法使用
public GlobalVari_6() {
init(); this.setTitle("Global Variables");
this.setSize(new Dimension(650, 400));
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
this.setVisible(true);
// this.setResizable(false);
} private void init() {
Vector<String> colHeader = new Vector<String>(); Vector<Vector<String>> dataVec = new Vector<Vector<String>>(); colHeader.add(" Variable");
colHeader.add("Value ");
colHeader.add("Time "); table = new JTable(dataVec, colHeader) {
private static final long serialVersionUID = 1L; public boolean isCellEditable(int row, int column) {
if (column > 1) {
return false;
} else {
return true;
}
}
}; // 2设置表头行高
table.getTableHeader().setPreferredSize(new Dimension(0, 20));
// 3设置表内容行高
table.setRowHeight(20);
// 4设置单选模式
table.getSelectionModel().setSelectionMode(
ListSelectionModel.SINGLE_SELECTION);
// 5设置单元格不可拖动
table.getTableHeader().setReorderingAllowed(false);
// 6设置不可改变列宽
table.getTableHeader().setResizingAllowed(false);
// 7设置列宽
table.getColumnModel().getColumn(0).setPreferredWidth(95);
table.getColumnModel().getColumn(1).setPreferredWidth(55);
table.getColumnModel().getColumn(2).setPreferredWidth(30);
// 注意索引越界 DefaultTableCellRenderer right = new DefaultTableCellRenderer();
// right.setHorizontalAlignment(JLabel.RIGHT);
right.setHorizontalAlignment(SwingConstants.RIGHT);
table.getColumnModel().getColumn(1).setCellRenderer(right);
table.getColumnModel().getColumn(2).setCellRenderer(right);
// table.getColumn(table.getColumnName(1)).setHeaderRenderer(right);
// table.getTableHeader().setDefaultRenderer(new HeaderRenderer(table));
((DefaultTableCellRenderer) table.getTableHeader().getDefaultRenderer())
.setHorizontalAlignment(JLabel.RIGHT); TableColumn column = table.getColumnModel().getColumn(0);
MultiLineHeaderRenderer headerRenderer = new MultiLineHeaderRenderer(
SwingConstants.LEFT, SwingConstants.BOTTOM);
column.setHeaderRenderer(headerRenderer); /*
* column = table.getColumnModel().getColumn(1); headerRenderer = new
* MultiLineHeaderRenderer( SwingConstants.LEFT, SwingConstants.BOTTOM);
* column.setHeaderRenderer(headerRenderer);
*/ final JButton buttonAdd = new JButton("Add");
final JButton buttonDel = new JButton("Delete");
final JButton buttonCls = new JButton("Close"); rowIndex = table.getSelectedRow();
System.out.println("index:" + rowIndex);
// 监听事件
table.getSelectionModel().addListSelectionListener(
new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
if (e.getValueIsAdjusting()) {// 连续操作
rowIndex = table.getSelectedRow();
if (rowIndex != -1) {
System.out.println("表格行被选中" + rowIndex);
buttonDel.setEnabled(true);
select = 1;
}
}
}
}); JScrollPane scrollPane = new JScrollPane();
scrollPane.setLayout(new ScrollPaneLayout());
scrollPane.setViewportView(table);
scrollPane.setBounds(5, 5, 515, 350);
this.getContentPane().add(scrollPane); buttonAdd.setEnabled(true);
buttonDel.setEnabled(false);
buttonCls.setEnabled(true); JPanel panel = new JPanel();
panel.setBounds(520, 5, 10, 350);
this.getContentPane().add(panel); panel.setLayout(null);
panel.add(buttonAdd);
buttonAdd.setSize(100, 22);
buttonAdd.setLocation(530, 6);
panel.add(buttonDel);
buttonDel.setSize(100, 22);
buttonDel.setLocation(530, 40);
panel.add(buttonCls);
buttonCls.setSize(100, 22);
buttonCls.setLocation(530, 322); buttonAdd.addMouseListener(new MouseListener() {
public void mouseClicked(MouseEvent e) {
DefaultTableModel model = (DefaultTableModel) table.getModel();
int rownum = table.getRowCount() + 1;
boolean exist = true;
for (int i = 0; i < model.getRowCount(); i++) {
if (model.getValueAt(i, 0).equals("gvar" + rownum)) {
exist = false;
break;
}
} if (exist == true)
model.addRow(new Object[] {
"gvar" + rownum,
"",
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
.format(new Date()) });
} public void mousePressed(MouseEvent e) {
} public void mouseReleased(MouseEvent e) {
} public void mouseEntered(MouseEvent e) {
} public void mouseExited(MouseEvent e) {
}
}); buttonDel.addMouseListener(new MouseListener() {
public void mouseClicked(MouseEvent e) {
if (select == 1) {
DefaultTableModel model = (DefaultTableModel) table
.getModel();
model.removeRow(rowIndex);
select = 0;
buttonDel.setEnabled(false);
}
} public void mousePressed(MouseEvent e) {
} public void mouseReleased(MouseEvent e) {
} public void mouseEntered(MouseEvent e) {
} public void mouseExited(MouseEvent e) {
}
}); buttonCls.addMouseListener(new MouseListener() {
public void mouseClicked(MouseEvent e) {
setVisible(false);
} public void mousePressed(MouseEvent e) {
} public void mouseReleased(MouseEvent e) {
} public void mouseEntered(MouseEvent e) {
} public void mouseExited(MouseEvent e) {
}
}); this.pack();
}
public static void main(String[] args) {
new GlobalVari_6();
}
}
buttonAdd.addMouseListener(new MouseListener() {
public void mouseClicked(MouseEvent e) {}
方法的最后面加上以下代码，试试看。
int row = model.getRowCount() - 1;
int col = 0;
if (table.editCellAt(row, col)) {
Component editor = table.getEditorComponent();
editor.requestFocusInWindow();
Component c = editor.getComponentAt(0, 0);
if (c != null && c instanceof JTextComponent) {
((JTextComponent) c).selectAll();
}
}