调整JTable的大小以适应行数
我有一个动态填充的JTable ，我希望表总是resize以适应行数。 我不希望任何滚动，因为表格在面板中，需要打印面板的内容。 我试过这个：
Dimension d = itemsTable.getPreferredSize(); //scrollPane.setPreferredSize(new Dimension(d.width,itemsTable.getRowHeight()*itemsTable.getRowCount()+10)); itemsTable.setPreferredScrollableViewportSize(new Dimension(d.width,itemsTable.getRowHeight()*itemsTable.getRowCount()+1))
但它似乎没有用。
public void getDetails(PosView pv){ Connection con = con(); DefaultTableModel model = (DefaultTableModel)pv.getItemsTable().getModel(); String date = null; double total = 0.0, paid = 0.0; try{ ps = con.prepareStatement("SELECT DISTINCT AMOUNT_PAYABLE, AMOUNT_PAID, BALANCE, DATE FROM SALES WHERE PAYMENT_ID = ?"); ps.setString(1, paymentId); rs = ps.executeQuery(); while(rs.next()){ total = (rs.getDouble(1)); paid += (rs.getDouble(2)); date = rs.getString(4); } double balance = total - paid; pv.setDate(date); pv.setPaymentId(paymentId); ps = con.prepareStatement("SELECT QUANTITY, ITEM_NAME, SELLING_PRICE, TOTAL FROM ITEMS_BOUGHT WHERE ID = ?"); ps.setString(1, paymentId); rs = ps.executeQuery(); while(rs.next()){ Object data[] = {rs.getInt(1), rs.getString(2), rs.getDouble(3),rs.getDouble(4)}; model.addRow(data); } logActivity(userId, "PAYMENT RECEIPT "+ paymentId +" GENERATED", con); pv.setTotal(total); pv.setPaid(paid); pv.setBalance(balance); }catch(SQLException e){ showMessageDialog(null, e.getMessage()); }finally{ try { if(ps!=null) ps.close(); con.close(); }catch(Exception e){} } }
我不认为这是最好的方式。 但是你坚持我已经把代码放在下面了。
import javax.swing.RowFilter; import javax.swing.table.DefaultTableModel; import javax.swing.table.TableRowSorter; /** * * @author user */ public class MyFrame extends javax.swing.JFrame { private DefaultTableModel model = null; TableRowSorter sorter = null; /** * Creates new form MyFrame */ public MyFrame() { initComponents(); model = new DefaultTableModel(null, new String[]{ "Name", "age", "salary" }); jTable1.setModel(model); for (int i = 0; i < 10; i++) { model.addRow(new Object[]{"Beniton", 34, 10000}); model.addRow(new Object[]{"Joema", 33, 10000}); } sorter = new TableRowSorter (model); jTable1.setRowSorter(sorter); int rowCount = model.getRowCount(); this.setSize(this.getWidth(), 50+ (jTable1.getRowHeight()*(rowCount+1))); } /** * This method is called from within the constructor to initialize the form. * WARNING: Do NOT modify this code. The content of this method is always * regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // private void initComponents() { java.awt.GridBagConstraints gridBagConstraints; jLabel1 = new javax.swing.JLabel(); searchBox = new javax.swing.JTextField(); jTable1 = new javax.swing.JTable(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); getContentPane().setLayout(new java.awt.GridBagLayout()); jLabel1.setText("Search"); getContentPane().add(jLabel1, new java.awt.GridBagConstraints()); searchBox.setMaximumSize(new java.awt.Dimension(150, 20)); searchBox.setMinimumSize(new java.awt.Dimension(150, 20)); searchBox.setName("searchField"); // NOI18N searchBox.setPreferredSize(new java.awt.Dimension(150, 20)); searchBox.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { searchBoxActionPerformed(evt); } }); gridBagConstraints = new java.awt.GridBagConstraints(); gridBagConstraints.gridx = 1; gridBagConstraints.gridy = 0; gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST; gridBagConstraints.weightx = 1.0; gridBagConstraints.insets = new java.awt.Insets(4, 4, 4, 4); getContentPane().add(searchBox, gridBagConstraints); searchBox.getAccessibleContext().setAccessibleName(""); jTable1.setModel(new javax.swing.table.DefaultTableModel( new Object [][] { {null, null, null, null}, {null, null, null, null}, {null, null, null, null}, {null, null, null, null} }, new String [] { "Title 1", "Title 2", "Title 3", "Title 4" } )); gridBagConstraints = new java.awt.GridBagConstraints(); gridBagConstraints.gridx = 0; gridBagConstraints.gridy = 1; gridBagConstraints.gridwidth = 2; gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH; gridBagConstraints.weightx = 1.0; gridBagConstraints.weighty = 1.0; getContentPane().add(jTable1, gridBagConstraints); pack(); }// private void searchBoxActionPerformed(java.awt.event.ActionEvent evt) { if (searchBox.getText().length() > 0) { Integer value = Integer.parseInt(searchBox.getText()); // Checking the age as Index is 1 RowFilter rf = RowFilter.numberFilter(RowFilter.ComparisonType.BEFORE, value, 1); sorter.setRowFilter(rf); } else { sorter.setRowFilter(null); } } /** * @param args the command line arguments */ public static void main(String args[]) { /* Set the Nimbus look and feel */ // /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(MyFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(MyFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(MyFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(MyFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } // /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new MyFrame().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JLabel jLabel1; private javax.swing.JTable jTable1; private javax.swing.JTextField searchBox; // End of variables declaration }
重写getPreferredScrollableViewportSize()以返回行高和行计数的乘积的倍数。 每次添加行时， pack()封闭窗口。
import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.event.ActionEvent; import javax.swing.AbstractAction; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.AbstractTableModel; /** * @see http://stackoverflow.com/a/37343900/230513 * @see http://stackoverflow.com/a/37318673/230513 */ public class Test { private void display() { JFrame f = new JFrame("Test"); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); class MyTableModel extends AbstractTableModel { private int n = 8; private void addRow() { n++; fireTableRowsInserted(n - 1, n - 1); } @Override public int getRowCount() { return n; } @Override public int getColumnCount() { return 4; } @Override public Object getValueAt(int rowIndex, int colIndex) { return "R" + rowIndex + ":C" + colIndex; } }; MyTableModel model = new MyTableModel(); JTable table = new JTable(model) { @Override public Dimension getPreferredScrollableViewportSize() { return new Dimension(super.getPreferredSize().width, getRowHeight() * getRowCount()); } }; table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); f.add(new JScrollPane(table)); f.add(new JButton(new AbstractAction("Add Row") { @Override public void actionPerformed(ActionEvent e) { model.addRow(); f.pack(); } }), BorderLayout.SOUTH); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Test()::display); } }