各种事件汇聚

1 按钮单击事件

 

jbutton=new JButton("改变");
jbutton.addActionListener(new Jbe());
 
class Jbe implements ActionListener{

public void actionPerformed(ActionEvent e){

content.setBackground(Color.red);
}

}

2 鼠标事件

include : mouseClickde(MouseEvent e)
             mouseEntered(MouseEvent e)  
             mouseExited(MouseEvent e)
             mousePressed(MouseEvent  e)
             mouseReleased(MouseEvent e)
class MouseE extends JFrame{
Container content;
public Container(){
content=getContentPane();
content.addMouseListener(new Mo());
content.add(jtf);
}


class Mo implements MouseListener{
 public void mousePressed(MouseEvent e)
{
  jtf.setText("shubiaozaijiemianzhongbeianxia");
}
public void mousePressed(MouseEvent e)
{
 jtf.setText("shubiaozaijiemianzhongbeishifang");
}
public  void mouseEntered(MouseEvent e)
{jtf.setText("shubiaojinrudaojiemianzhong");
public  void mouseExited(MouseEvent e)
{
jtf.setText("shubiaotuichudangqianjiemiaochuangkou");
}
public void mouseClick(MouseEvent e)
{ jtf.setText("shubiaojinxingdanjile,qiweizhi X zuobiaowei"+e.getX()+Y zuobiaowei"+e.getY());
}

3 鼠标高级事件

 

content.addMouseMotionListener(new MO());

class Mo implements MouseMotionListener{

x=(int)e.getX();
y=(int)e.getY();
if(X!=-1&&Y=-1)
Graphics g=getGraphics();
g.drawLine(x,y,x,y);
}


public void mouseMoved(MouseEvent e){}

 4 选项事件

public ItenE(){
content=getContentPane();
String s[]={"C#","C++","Java","jsp"}；
combox=new JComboBox(s);
combo.addItemListener(new Mo());
content.add(combo);
}
class Mo implements ItemListener{
  public void  itemStateChanged(ItemEvent e){
     if(combo.getSelectedIndex()==0)
  j1.setIcon(new ImageIcon("1.jpg"));
     if(combo.getSelectedIndex()==1)
  j1.setIcon(new ImageIcon("2.jpg"));
     if(combo.getSelectedIndex()==2)
  j1.setIcon(new ImageIcon("3.jpg")) ;
     if(combo.getSelectedIndex()==3)
  j1.setIcon(new ImageIcon("4.jpg")); 

 5 窗口事件

 

public WindowE()
{
addwindowListener(new Mo());
}
class Mo implements WindowListener{
public void windowClosing(WindowEvent e){
jtf.append("\n 窗口正在关闭");
}
public void windowOpened(WindowEvent e){
jtf.append("\n窗口打开");
}
public void windowIconified(WindowEvent e){
jtf.append("\n窗口最小化");
}
public void windowDeiconified(WindowEvent e){
jtf.append("\n撤销图标化")；
}