关于JTable的单元格编辑的问题（希大虾们近来观光观光，不胜感激！）

看看DefaultCellEditor类的源代码在继承这个类的时候，需要实现一个方法：
********************************************************************************
     *
     * Specifies the number of clicks needed to start editing.
********************************************************************************
     * @param count  an int specifying the number of clicks needed to start editing
     * @see #getClickCountToStart
     */
    public void setClickCountToStart(int count) {
clickCountToStart = count;
    }
你只要实现new DefaultCellEditor(new JTextField()).setClickCountToStart（１）就行了，１就是click　１次。
下面是这个类的源代码
****************************************************************************************
/*
* @(#)DefaultCellEditor.java 1.38 00/02/02
*
* Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the proprietary information of Sun Microsystems, Inc.
* Use is subject to license terms.
*
*/package javax.swing;import java.awt.Component;
import java.awt.event.*;
import java.awt.AWTEvent;
import java.lang.Boolean;
import javax.swing.table.*;
import javax.swing.event.*;
import java.util.EventObject;
import javax.swing.tree.*;
import java.io.Serializable;/**
* The default editor for table and tree cells.
* <p>
* <strong>Warning:</strong>
* Serialized objects of this class will not be compatible with
* future Swing releases.  The current serialization support is appropriate
* for short term storage or RMI between applications running the same
* version of Swing.  A future release of Swing will provide support for
* long term persistence.
*
* @version 1.38 02/02/00
* @author Alan Chung
* @author Philip Milne
*/public class DefaultCellEditor extends AbstractCellEditor
    implements TableCellEditor, TreeCellEditor { //
//  Instance Variables
//    protected JComponent editorComponent;
    protected EditorDelegate delegate;
    protected int clickCountToStart = 1;//
//  Constructors
//    /**
     * Constructs a DefaultCellEditor that uses a text field.
     *
     * @param x  a JTextField object ...
     */
    public DefaultCellEditor(final JTextField textField) {
        editorComponent = textField;
this.clickCountToStart = 2;
        delegate = new EditorDelegate() {
            public void setValue(Object value) {
textField.setText((value != null) ? value.toString() : "");
            }     public Object getCellEditorValue() {
return textField.getText();
    }
        };
textField.addActionListener(delegate);
    }    /**
     * Constructs a DefaultCellEditor object that uses a check box.
     *
     * @param x  a JCheckBox object ...
     */
    public DefaultCellEditor(final JCheckBox checkBox) {
        editorComponent = checkBox;
        delegate = new EditorDelegate() {
            public void setValue(Object value) {
             boolean selected = false;
if (value instanceof Boolean) {
    selected = ((Boolean)value).booleanValue();
}
else if (value instanceof String) {
    selected = value.equals("true");
}
checkBox.setSelected(selected);
            }     public Object getCellEditorValue() {
return new Boolean(checkBox.isSelected());
    }
        };
checkBox.addActionListener(delegate);
    }    /**
     * Constructs a DefaultCellEditor object that uses a combo box.
     *
     * @param x  a JComboBox object ...
     */
    public DefaultCellEditor(final JComboBox comboBox) {
        editorComponent = comboBox;
comboBox.putClientProperty("JComboBox.lightweightKeyboardNavigation", "Lightweight");
        delegate = new EditorDelegate() {
            public void setValue(Object value) {
comboBox.setSelectedItem(value);
            }     public Object getCellEditorValue() {
return comboBox.getSelectedItem();
    }

            public boolean shouldSelectCell(EventObject anEvent) {
                if (anEvent instanceof MouseEvent) {
                    MouseEvent e = (MouseEvent)anEvent;
                    return e.getID() != MouseEvent.MOUSE_DRAGGED;
                }
                return true;
            }
        };
comboBox.addActionListener(delegate);
    }    /**
     * Returns the a reference to the editor component.
     *
     * @return the editor Component
     */
    public Component getComponent() {
return editorComponent;
    }//
//  Modifying
//    /**
     * Specifies the number of clicks needed to start editing.
     *
     * @param count  an int specifying the number of clicks needed to start editing
     * @see #getClickCountToStart
     */
    public void setClickCountToStart(int count) {
clickCountToStart = count;
    }    /**
     *  ClickCountToStart controls the number of clicks required to start
     *  editing.
     */
    public int getClickCountToStart() {
return clickCountToStart;
    }//
//  Override the implementations of the superclass, forwarding all methods
//  from the CellEditor interface to our delegate.
//    public Object getCellEditorValue() {
        return delegate.getCellEditorValue();
    }    public boolean isCellEditable(EventObject anEvent) {
return delegate.isCellEditable(anEvent);
    }

    public boolean shouldSelectCell(EventObject anEvent) {
return delegate.shouldSelectCell(anEvent);
    }    public boolean stopCellEditing() {
return delegate.stopCellEditing();
    }    public void cancelCellEditing() {
delegate.cancelCellEditing();
    }//
//  Implementing the TreeCellEditor Interface
//    public Component getTreeCellEditorComponent(JTree tree, Object value,
boolean isSelected,
boolean expanded,
boolean leaf, int row) {
String         stringValue = tree.convertValueToText(value, isSelected,
    expanded, leaf, row, false); delegate.setValue(stringValue);
return editorComponent;
    }//
//  Implementing the CellEditor Interface
//    public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected,
int row, int column) {
        delegate.setValue(value);
return editorComponent;
    }
//
//  Protected EditorDelegate class
//    protected class EditorDelegate implements ActionListener, ItemListener, Serializable {        protected Object value;        public Object getCellEditorValue() {
            return value;
        }     public void setValue(Object value) {
    this.value = value;
}        public boolean isCellEditable(EventObject anEvent) {
    if (anEvent instanceof MouseEvent) {
return ((MouseEvent)anEvent).getClickCount() >= clickCountToStart;
    }
    return true;
}

        public boolean shouldSelectCell(EventObject anEvent) {
            return true;
        }        public boolean startCellEditing(EventObject anEvent) {
    return true;
}        public boolean stopCellEditing() {
    fireEditingStopped();
    return true;
}       public void cancelCellEditing() {
   fireEditingCanceled();
       }        public void actionPerformed(ActionEvent e) {
            DefaultCellEditor.this.stopCellEditing();
}        public void itemStateChanged(ItemEvent e) {
    DefaultCellEditor.this.stopCellEditing();
}
    }} // End of class JCellEditor

调试易

关于JTable的单元格编辑的问题（希大虾们近来观光观光，不胜感激！）

解决方案 »