如何在Swing的JTable列中添加不同的JComboBox項目

Question

我想在列1中的JTable（3,3）中添加JComboBox。但在列1中，每行都有自己的一組ComboBox元素。 當我試圖用

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

每一行都被設置爲相同的一組組合框的值的。 但我希望每行ComboBox都有不同的項目。

Answer 1

例如在java2s.com看起來就像是作品和正確，那麼例如（我harcoded JComboBoxes爲簡單的例子，並添加了對今天的Swing /變更）

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類

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; 
      } 


     } 

    } 





}