如何在Swing的JTable列中添加不同的JComboBox项目

我想在第一列的JTable（3,3）中添加JComboBox。但是在第一列中，每一行都有自己的一组ComboBox元素。 当我尝试使用

table.getColumnModel().getColumn(1).setCellEditor(new DefaultCellEditor(comboBox_Custom)); 

每行都被设置为相同的一组ComboBox值。 但是我希望每行ComboBox都有不同的项目。

Answer 1

在java2s.com上的例子看起来像工作和正确的，然后例如（我为了快速的例子，对JComboBoxes进行了编码，并为今天的Swing添加/改变）

 import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.UIManager.LookAndFeelInfo; import javax.swing.table.*; public class EachRowEditorExample extends JFrame { private static final long serialVersionUID = 1L; public EachRowEditorExample() { super("EachRow Editor Example"); try { for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) { System.out.println(info.getName()); if ("Nimbus".equals(info.getName())) { UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (UnsupportedLookAndFeelException e) { // handle exception } catch (ClassNotFoundException e) { // handle exception } catch (InstantiationException e) { // handle exception } catch (IllegalAccessException e) { // handle exception } DefaultTableModel dm = new DefaultTableModel(); dm.setDataVector(new Object[][]{{"Name", "MyName"}, {"Gender", "Male"}, {"Color", "Fruit"}}, new Object[]{"Column1", "Column2"}); JTable table = new JTable(dm); table.setRowHeight(20); JComboBox comboBox = new JComboBox(); comboBox.addItem("Male"); comboBox.addItem("Female"); comboBox.addComponentListener(new ComponentAdapter() { @Override public void componentShown(ComponentEvent e) { final JComponent c = (JComponent) e.getSource(); SwingUtilities.invokeLater(new Runnable() { @Override public void run() { c.requestFocus(); System.out.println(c); if (c instanceof JComboBox) { System.out.println("a"); } } }); } }); JComboBox comboBox1 = new JComboBox(); comboBox1.addItem("Name"); comboBox1.addItem("MyName"); comboBox1.addComponentListener(new ComponentAdapter() { @Override public void componentShown(ComponentEvent e) { final JComponent c = (JComponent) e.getSource(); SwingUtilities.invokeLater(new Runnable() { @Override public void run() { c.requestFocus(); System.out.println(c); if (c instanceof JComboBox) { System.out.println("a"); } } }); } }); JComboBox comboBox2 = new JComboBox(); comboBox2.addItem("Banana"); comboBox2.addItem("Apple"); comboBox2.addComponentListener(new ComponentAdapter() { @Override public void componentShown(ComponentEvent e) { final JComponent c = (JComponent) e.getSource(); SwingUtilities.invokeLater(new Runnable() { @Override public void run() { c.requestFocus(); System.out.println(c); if (c instanceof JComboBox) { System.out.println("a"); } } }); } }); EachRowEditor rowEditor = new EachRowEditor(table); rowEditor.setEditorAt(0, new DefaultCellEditor(comboBox1)); rowEditor.setEditorAt(1, new DefaultCellEditor(comboBox)); rowEditor.setEditorAt(2, new DefaultCellEditor(comboBox2)); table.getColumn("Column2").setCellEditor(rowEditor); JScrollPane scroll = new JScrollPane(table); getContentPane().add(scroll, BorderLayout.CENTER); setPreferredSize(new Dimension(400, 120)); setLocation(150, 100); pack(); setVisible(true); } public static void main(String[] args) { EachRowEditorExample frame = new EachRowEditorExample(); frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); } } 

只需添加EachRowEditor类

Answer 2

 package com.atos.table.classes; import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.util.HashMap; import javax.swing.DefaultCellEditor; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JTextField; import javax.swing.table.DefaultTableModel; import javax.swing.table.TableColumnModel; public class PartCustomerWindow2 { public static final Object[][] DATA = { { 1, 2,3, 4,false }, { 5, 6,7, 8 ,true},{ 9, 10,11, 12,true }, { 13, 14,15, 16,true } }; public static final String[] COL_NAMES = { "One", "Two", "Three", "Four",MyTableModel1.SELECT }; JButton but = new JButton("Add"); private JComboBox jcomboBox = null; private JTextField jTextField = null; static Object[][] rowData = null; private JTable table=null; static JFrame frame = null; HashMap mp = null; static int count = 0; String content = null; public JTextField getjTextField() { if(jTextField == null) { jTextField = new FMORestrictedTextField(FMORestrictedTextField.JUST_ALPHANUMERIC, 8); } mp = new HashMap(); mp.put("arif",2); mp.put("8",6); mp.put("12",10); mp.put("14",16); mp.put("pk1",22); mp.put("pk3",23); jTextField.addKeyListener(new KeyAdapter() { public void keyReleased(KeyEvent event) { if(count == 0) content = jTextField.getText(); // System.out.println(content); if(mp.containsKey(content)) { JFrame parent = new JFrame(); JOptionPane.showMessageDialog(parent, "Already Assigned"); } } }); return jTextField; } public void setjTextField(JTextField jTextField) { this.jTextField = jTextField; } public JComboBox getJcomboBox() { if(jcomboBox == null) { jcomboBox = new JComboBox(); } return jcomboBox; } public void setJcomboBox(JComboBox jcomboBox) { this.jcomboBox = jcomboBox; } private void createAndShowGui(PartCustomerWindow2 ob) { /*rowData = new Object[DATA.length][]; for (int i = 0; i < rowData.length; i++) { rowData[i] = new Object[DATA[i].length + 1]; for (int j = 0; j < DATA[i].length; j++) { rowData[i][j] = DATA[i][j]; } rowData[i][DATA[i].length] = Boolean.TRUE; if(i == 2 || i ==3) rowData[i][DATA[i].length] = Boolean.FALSE; }*/ MyTableModel3 tableModel = new MyTableModel3(DATA, COL_NAMES, "My Table", ob); table = new JTable(tableModel); //table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); /*table.addFocusListener(new java.awt.event.FocusAdapter() { public void focusLost(java.awt.event.FocusEvent evt) { table.getSelectionModel().clearSelection(); } });*/ TableColumnModel cm = table.getColumnModel(); /*cm.getColumn(2).setCellEditor(new DefaultCellEditor( new JComboBox(new DefaultComboBoxModel(new String[] { "Yes", "No", "Maybe" }))));*/ /* String ar1[]= {"aa","aaa","aaaa"}; ob.getJcomboBox().setModel(new DefaultComboBoxModel(ar1));*/ cm.getColumn(2).setCellEditor(new DefaultCellEditor( ob.getJcomboBox())); cm.getColumn(3).setCellEditor(new DefaultCellEditor( ob.getjTextField())); JScrollPane scrollPane = new JScrollPane(); /* scrollPane.add("Table",table); scrollPane.add("Button",but);*/ JFrame frame2 = new JFrame(); /* jcomboBox.setPreferredSize(new Dimension(100,20)); textField.setPreferredSize(new Dimension(100,20)); jcomboBox.setEnabled(false); textField.setEnabled(false); */ JScrollPane scrollPane2 = new JScrollPane(but); but.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { if(table.getCellEditor() != null) table.getCellEditor().stopCellEditing(); // TODO Auto-generated method stub String[][] ar = new String[table.getRowCount()][5]; for(int i =0;i<table.getRowCount();i++) { for(int j=0;j<5;j++) { DATA[i][j] = table.getValueAt(i,j); } System.out.print(table.getValueAt(i,0)+" "); System.out.print(table.getValueAt(i,1)+" "); System.out.print(table.getValueAt(i,2)+" "); System.out.print(table.getValueAt(i,3)+" "); System.out.println(table.getValueAt(i,4)+" "); } System.out.println("*******************"); /* for(int i=0;i<DATA.length;i++) { System.out.print(DATA[i][0]); System.out.print(DATA[i][1]); System.out.print(DATA[i][2]); System.out.print(DATA[i][3]); boolean check =(Boolean) DATA[i][4]; System.out.println(check); }*/ }}); frame = new JFrame("PartCustomerWindow2"); // //JFrame frame = new JFrame(); Container contentPane = frame.getContentPane(); contentPane.setLayout(new BorderLayout()); contentPane.add(new JScrollPane(table), BorderLayout.NORTH); contentPane.add(but); // //frame.setLayout(new FlowLayout()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); /* frame.getContentPane().add(scrollPane2); frame.getContentPane().add(scrollPane3); frame.getContentPane().add(scrollPane4);*/ frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } public static void main(String[] args) { PartCustomerWindow2 ob = new PartCustomerWindow2(); ob.createAndShowGui(ob); } } @SuppressWarnings("serial") class MyTableModel3 extends DefaultTableModel { public static final String SELECT = "select"; String tablename; PartCustomerWindow2 ob = null; public MyTableModel3(Object[][] rowData, Object[] columnNames, String tableName,PartCustomerWindow2 ob) { super(rowData, columnNames); this.tablename = tableName; this.ob = ob; } @Override public Class<?> getColumnClass(int columnIndex) { if (getColumnName(columnIndex).equalsIgnoreCase(SELECT)) { return Boolean.class; } else return super.getColumnClass(columnIndex); } @Override public boolean isCellEditable(int row, int col) { JComboBox jb = ob.getJcomboBox(); JTextField jt = ob.getjTextField(); if(((Boolean) getValueAt(row, getColumnCount() - 1)).booleanValue()) { // jb.setEnabled(false); jb.removeAllItems(); // System.out.println(jb.getItemCount()); if(row == 0) { jb.addItem("arif"); jb.addItem("asif"); jb.addItem("ashik"); jb.addItem("farooq"); jb.addItem("adkh"); } if(row > 0) { jb.addItem("kjhds"); jb.addItem("sdds"); jb.addItem("asdfsdk"); jb.addItem("sdfsdf"); jb.addItem("sdf"); } /*HashMap mp = new HashMap(); mp.put("arif",2); mp.put("8",6); mp.put("12",10); mp.put("14",16); mp.put("pk1",22); mp.put("pk3",23); */ /* if(col == 3){ if(mp.containsKey(jt.getText())) { System.out.println("Sorry..!! already assigned"); jt.setFocusable(true); } jt.setText(""); jt.setEnabled(false); }*/ } else { // jb.setEnabled(true); //jt.setEnabled(true); } if (col == getColumnCount()-1 ) { return true; } else{ if (getColumnName(4).equalsIgnoreCase(SELECT) && ((Boolean) getValueAt(row, getColumnCount() - 1)).booleanValue()) { // jb.setEnabled(true); // jt.setEnabled(true); return (col == 2 || col == 3); } else{ // jb.setEnabled(false); //jt.setEnabled(false); return false; } } } }