import java.awt.Component;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.util.EventObject;
public class GenderEditor extends JComboBox implements TableCellEditor{
protected EventListenerList el = new EventListenerList();
protected ChangeEvent ec = new ChangeEvent (this);
public GenderEditor ()
{
super ();
addItem ("male");
addItem ("female");
addActionListener (new ActionListener ()
{
public void actionPerformed (ActionEvent e)
{
fireEditingStopped ();
}
});
}
public void addCellEditorListener (CellEditorListener e)
{
el.add(CellEditorListener.class, e);
}
public void removeCellEditorListener (CellEditorListener e)
{
el.remove(CellEditorListener.class, e);
}
public void fireEditingStopped ()
{
CellEditorListener listener;
Object[] listeners = el.getListenerList();
for (int i = 0; i < listeners.length; i++)
{
if (listeners[i] == CellEditorListener.class)
{
listener = (CellEditorListener)listeners[i+1];
listener.editingStopped(ec);
}
}
}
public void fireEditingCanceled ()
{
CellEditorListener listener;
Object[] listeners = el.getListenerList();
for (int i = 0; i < listeners.length; i++)
{
if (listeners[i] == CellEditorListener.class)
{
listener = (CellEditorListener)listeners[i+1];
listener.editingCanceled(ec);
}
}
}
public void cancelCellEditing ()
{
fireEditingCanceled ();
}
public boolean stopCellEditing ()
{
fireEditingStopped ();
return true;
}
public boolean isCellEditable (EventObject event)
{
return true;
}
public boolean shouldSelectCell (EventObject event)
{
return true;
}
public Object getCellEditorValue ()
{
return new Boolean (getSelectedIndex () == 0 ? true : false);
}
public Component getTableCellEditorComponent (JTable table, Object value,
boolean isSelected, int row, int col)
{
boolean isMale = ((Boolean)isSelected).booleanValue();
setSelectedIndex (isMale ? 0 : 1);
return this;
}
}请问,这里的listener = (CellEditorListener)listeners[i+1];为什么是要+1?
这样和条件判断好像没有什么相关的了啊?
高手指点下,谢谢!!!
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.util.EventObject;
public class GenderEditor extends JComboBox implements TableCellEditor{
protected EventListenerList el = new EventListenerList();
protected ChangeEvent ec = new ChangeEvent (this);
public GenderEditor ()
{
super ();
addItem ("male");
addItem ("female");
addActionListener (new ActionListener ()
{
public void actionPerformed (ActionEvent e)
{
fireEditingStopped ();
}
});
}
public void addCellEditorListener (CellEditorListener e)
{
el.add(CellEditorListener.class, e);
}
public void removeCellEditorListener (CellEditorListener e)
{
el.remove(CellEditorListener.class, e);
}
public void fireEditingStopped ()
{
CellEditorListener listener;
Object[] listeners = el.getListenerList();
for (int i = 0; i < listeners.length; i++)
{
if (listeners[i] == CellEditorListener.class)
{
listener = (CellEditorListener)listeners[i+1];
listener.editingStopped(ec);
}
}
}
public void fireEditingCanceled ()
{
CellEditorListener listener;
Object[] listeners = el.getListenerList();
for (int i = 0; i < listeners.length; i++)
{
if (listeners[i] == CellEditorListener.class)
{
listener = (CellEditorListener)listeners[i+1];
listener.editingCanceled(ec);
}
}
}
public void cancelCellEditing ()
{
fireEditingCanceled ();
}
public boolean stopCellEditing ()
{
fireEditingStopped ();
return true;
}
public boolean isCellEditable (EventObject event)
{
return true;
}
public boolean shouldSelectCell (EventObject event)
{
return true;
}
public Object getCellEditorValue ()
{
return new Boolean (getSelectedIndex () == 0 ? true : false);
}
public Component getTableCellEditorComponent (JTable table, Object value,
boolean isSelected, int row, int col)
{
boolean isMale = ((Boolean)isSelected).booleanValue();
setSelectedIndex (isMale ? 0 : 1);
return this;
}
}请问,这里的listener = (CellEditorListener)listeners[i+1];为什么是要+1?
这样和条件判断好像没有什么相关的了啊?
高手指点下,谢谢!!!
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EventListenerList el = new EventListenerList();
不知道你这个类怎么封装的
el.add(CellEditorListener.class, e);
好像是用个数组保存,数组长度为2
前者保存监听器的Class,后者保存保存监听器
所以
listeners[i] == CellEditorListener.class) //判断前者的Class是否一致
{
listener = (CellEditorListener)listeners[i+1]; //然后取后者监听器
一个类,一个此类实例
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.util.EventObject;
public class GenderEditor extends JComboBox implements TableCellEditor{
protected EventListenerList el = new EventListenerList();
protected ChangeEvent ec = new ChangeEvent(this); public GenderEditor() {
super();
addItem("male");
addItem("female");
addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
fireEditingStopped();
}
});
} public void addCellEditorListener(CellEditorListener e) {
el.add(CellEditorListener.class, e);
} public void removeCellEditorListener(CellEditorListener e) {
el.remove(CellEditorListener.class, e);
} public void fireEditingStopped() {
CellEditorListener listener;
Object[] listeners = el.getListenerList();
for (int i = 0; i < listeners.length; i++) {
if (listeners[i] == CellEditorListener.class) {
listener = (CellEditorListener) listeners[i + 1];
listener.editingStopped(ec);
}
}
} public void fireEditingCanceled() {
CellEditorListener listener;
Object[] listeners = el.getListenerList();
for (int i = 0; i < listeners.length; i++) {
if (listeners[i] == CellEditorListener.class) {
listener = (CellEditorListener) listeners[i + 1];
listener.editingCanceled(ec);
}
}
} public void cancelCellEditing() {
fireEditingCanceled();
} public boolean stopCellEditing() {
fireEditingStopped();
return true;
} public boolean isCellEditable(EventObject event) {
return true;
} public boolean shouldSelectCell(EventObject event) {
return true;
} public Object getCellEditorValue() {
return new Boolean(getSelectedIndex() == 0 ? true : false);
} public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row,
int col) {
boolean isMale = ( (Boolean) isSelected).booleanValue();
setSelectedIndex(isMale ? 0 : 1);
return this;
}
}