问题
I want to add JComboBox inside a JTable (3,3) on column 1. But in the column 1 , each row will have its own set of ComboBox element. When I tried to use
table.getColumnModel().getColumn(1).setCellEditor(new DefaultCellEditor(comboBox_Custom));
Each row is being set to same set of ComboBox Values. But I want each row ComboBox has different items.
回答1:
example on java2s.com looks like as works and correctly, then for example (I harcoded JComboBoxes for quick example, and add/change for todays Swing)
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);
}
});
}
}
just add EachRowEditor Class
回答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;
}
}
}
}
来源：https://stackoverflow.com/questions/6261017/how-to-add-different-jcombobox-items-in-a-column-of-a-jtable-in-swing