어떻게 removeTableModelListener를 사용할 수 있습니까?

Question

런타임에 "addTableModelListener"를 테이블 모델에 구현했지만이를 제거 할 수있는 컨트롤을 하나 만들고 싶습니다. Google에서 검색했지만 테이블 모델 수신기를 제거하기위한 적절한 로직을 찾지 못했습니다.

removeTableModelListener 방법을 구현하는 데 도움을주십시오.

import java.awt.Component; 
import java.awt.Dimension; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.sql.ResultSet; 
import java.sql.Statement; 
import javax.swing.DefaultComboBoxModel; 
import javax.swing.JButton; 
import javax.swing.JComboBox; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JScrollPane; 
import javax.swing.JTable; 
import javax.swing.ScrollPaneConstants; 
import javax.swing.event.TableModelEvent; 
import javax.swing.event.TableModelListener; 
import javax.swing.table.DefaultTableModel; 
import javax.swing.table.TableCellRenderer; 
import javax.swing.table.TableModel; 

public class CheckList extends JPanel { 

    private static final long serialVersionUID = 1L; 
    /** 
    * Create the panel. 
    */ 
    static JTable table; 
    public int row; 
    public int column; 
    static MyTableModel model; 
    static int t; 

    public CheckList() { 
     try { 
      model = new MyTableModel(); 
      table = new JTable(model); 
      table.setPreferredScrollableViewportSize(new Dimension(100, 70)); 
      table.setFillsViewportHeight(true); 
      table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS); 

      // Create the scroll pane and add the table to it. 
      JScrollPane scrollPane = new JScrollPane(table); 
      scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS); 
      scrollPane.setBounds(10, 132, 998, 522); 
      setLayout(null); 
      add(scrollPane); 

      JButton btnNewButton = new JButton("New button"); 
      btnNewButton.addActionListener(new ActionListener() { 

       public void actionPerformed(ActionEvent e) { 
        if (model.getRowCount() != 0) { 
         model.getDataVector().removeAllElements(); 

        } 
        model.addrows(); 
       } 
      }); 
      btnNewButton.setBounds(868, 33, 89, 23); 
      add(btnNewButton); 

      final JComboBox comboBox = new JComboBox(); 
      comboBox.addActionListener(new ActionListener() { 

       public void actionPerformed(ActionEvent e) { 

        switch (comboBox.getSelectedIndex()) { 
         case 0: { 
          model.removeTableModelListener(table.getModel()); 

         } 
         case 1: { 

          model.addTableModelListener(new TableModelListener() { 

           public void tableChanged(TableModelEvent e) { 

            try {// TODO Auto-generated method stub 

             row = e.getFirstRow(); 
             column = e.getColumn(); 
             TableModel mod = (TableModel) e.getSource(); 
             String columnName = mod.getColumnName(column); 
             Object data = mod.getValueAt(row, column); 
             System.out.println(columnName + " " 
              + data + " row is " + row); 
             System.out.println("value at" 
              + model.getValueAt(row, 4)); 
             Boolean status = (Boolean) data; 
             String check; 
             // int value = (Integer) getValueAt(row, 4); 
             // System.out.println(value); 
             if (status == true) { 
              check = "Recieved"; 

             } else { 
              check = "not Recieved"; 
             } 
             System.out.println(check); 
             // int row1 = row + 1; 
             model.st.executeUpdate("update temp1 set [" 
              + columnName + "]='" + check 
              + "' where [Packet ID]=" 
              + model.getValueAt(row, 4) + ""); 

            } catch (Exception t) { 
             System.out.println(t); 
            } 

           } 
          }); 

          break; 
         } 
        } 
       } 
      }); 
      comboBox.setModel(new DefaultComboBoxModel(new String[]{"view", 
        "edit"})); 
      comboBox.setBounds(158, 48, 81, 20); 
      add(comboBox); 

      JLabel lblNewLabel = new JLabel("Mode"); 
      lblNewLabel.setBounds(102, 51, 46, 14); 
      add(lblNewLabel); 

     } catch (Exception e) { 
      System.out.println(e); 
     } 
    } 

    public class MyTableModel extends DefaultTableModel implements 
     TableCellRenderer, TableModelListener { 

     /** 
     * 
     */ 
     public void add() { 
      addRow(new Object[]{"", "", " ", " ", "", " ", new Boolean(status)}); 
     } 

     public void addrows() { 

      try { 

       st = login.con.createStatement(); 
       ResultSet re = st.executeQuery("select * FROM temp1 where operator=" 
        + managment.log_id + ""); 

       while (re.next()) { 
        String n1 = re.getString("customer ID"); 
        String n2 = re.getString("customer name"); 
        String n3 = re.getString("packet id"); 
        String n4 = re.getString("packet type"); 
        String n5 = re.getString("reciever id"); 
        String n6 = re.getString("reciever name"); 
        String n7 = re.getString("reciever status"); 
        if (n7.equals("Recieved")) { 
         status = true; 

        } else { 
         status = false; 
        } 
        addRow(new Object[]{"" + n1 + "", " " + n2 + "", 
          " " + n5 + "", " " + n6 + "", " " + n3 + "", 
          " " + n4 + "", new Boolean(status)}); 
       } 
      } catch (Exception e) { 
       // TODO Auto-generated catch block 
       System.out.println(e); 
      } 
     } 
     private static final long serialVersionUID = 1L; 
     /* 
     * 
     */ 
     public Statement st; 
     boolean status; 
     public int row; 
     public int column; 

     /** 
     * 
     */ 
     public MyTableModel() { 
      // TODO Auto-generated constructor stub 

      addColumn("sender ID"); 
      addColumn("sender Name"); 

      addColumn("Recieving ID"); 
      addColumn("Reciever Name"); 

      addColumn("Packet ID"); 
      addColumn("Packet Category"); 
      addColumn("reciever status"); 

     } 

     @Override 
     public int getColumnCount() { 
      // TODO Auto-generated method stub 
      return super.getColumnCount(); 
     } 

     @Override 
     public int getRowCount() { 
      // TODO Auto-generated method stub 
      return super.getRowCount(); 
     } 

     @Override 
     public String getColumnName(int column) { 
      // TODO Auto-generated method stub 
      return super.getColumnName(column); 
     } 

     @Override 
     public Object getValueAt(int row, int column) { 
      // TODO Auto-generated method stub 
      return super.getValueAt(row, column); 
     } 

     @Override 
     public boolean isCellEditable(int row, int column) { 

      return super.isCellEditable(row, column); 

     } 

     public Class<?> getColumnClass(int c) { 
      return getValueAt(0, c).getClass(); 
     } 

     @Override 
     public void setValueAt(Object aValue, int row, int column) { 
      // TODO Auto-generated method stub 
      super.setValueAt(aValue, row, column); 
      // System.out.println("new value"); 
      // printDebugData(); 
     } 

     @Override 
     public Component getTableCellRendererComponent(JTable arg0, 
      Object arg1, boolean arg2, boolean arg3, int arg4, int arg5) { 
      // TODO Auto-generated method stub 
      return null; 
     } 

     @Override 
     public void tableChanged(TableModelEvent arg0) { 
      // TODO Auto-generated method stub 
     } 
    } 
// @Override 
// public void addTableModelListener(TableModelListener l) { 
// // TODO Auto-generated method stub 
// 
// super.addTableModelListener(new TableModelListener() { 
// 
// @Override 
// public void tableChanged(TableModelEvent e) { 
// 
// try {// TODO Auto-generated method stub 
// row = e.getFirstRow(); 
// column = e.getColumn(); 
// TableModel mod = (TableModel) e.getSource(); 
// String columnName = mod.getColumnName(column); 
// Object data = mod.getValueAt(row, column); 
// System.out.println(columnName + " " + data 
// + " row is " + row); 
// System.out.println("value at" + getValueAt(row, 4)); 
// Boolean status = (Boolean) data; 
// String check; 
// // int value = (Integer) getValueAt(row, 4); 
// // System.out.println(value); 
// if (status == true) { 
// check = "Recieved"; 
// 
// } else { 
// check = "not Recieved"; 
// } 
// System.out.println(check); 
// // int row1 = row + 1; 
// st.executeUpdate("update temp1 set [" + columnName 
// + "]='" + check + "' where [Packet ID]=" 
// + getValueAt(row, 4) + ""); 
// 
// } catch (Exception t) { 
// System.out.println(t); 
// } 
// 
// } 
// }); 
// } 

    /* 
    * private void printDebugData() { int numRows = getRowCount(); int numCols 
    * = getColumnCount(); 
    * 
    * for (int i = 0; i < numRows; i++) { System.out.print(" row " + i + ":"); 
    * for (int j = 0; j < numCols; j++) { System.out.print(" " + getValueAt(i, 
    * j)); } System.out.println(" "); 
    * 
    * } 
    * 
    * System.out.println("--------------------------"); } 
    */ 
} 

Answer 1

최종 로컬 변수에 TableModelListener을 저장하십시오. 당신의 actionPerformed에에 액세스 할 수 있습니다 : 일반적인 관찰로

final TableModelListener modelListener = new TableModelListener() { 
    ... 
}; 
final JComboBox comboBox = new JComboBox(); 
comboBox.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
     switch (comboBox.getSelectedIndex()) { 
      case 0: { 
       model.removeTableModelListener(modelListener); 
       break; 
      } 
      case 1: { 
       model.addTableModelListener(modelListener); 
      } 
     } 
    }); 

, 나는 TableModelListener 클래스 멤버 변수를 만드는 것이 좋습니다 것입니다,하지만 변수의 많은 static이다. 나는 그러한 변수들을 피하는 것을 권할 것이다 static.