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JavaEvent/Event_t.java at master · goder/JavaEvent · GitHub
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Event_t.java
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Event_t.java
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/*
* 事件处理机制
*/
package
com
.
bj
.
event
;
import
java
.
awt
.*;
import
java
.
awt
.
event
.
ActionEvent
;
import
java
.
awt
.
event
.
ActionListener
;
import
javax
.
swing
.*;
public
class
Event_t
extends
JFrame
implements
ActionListener
{
//定义一个panel
Panel
mp
=
null
;
JButton
jb1
=
null
;
JButton
jb2
=
null
;
public
static
void
main
(
String
[]
args
) {
// TODO Auto-generated method stub
Event_t
e
=
new
Event_t
();
}
public
Event_t
(){
mp
=
new
Panel
();
jb1
=
new
JButton
(
"黑色"
);
jb2
=
new
JButton
(
"红色"
);
this
.
add
(
jb1
,
BorderLayout
.
NORTH
);
this
.
add
(
mp
);
this
.
add
(
jb2
,
BorderLayout
.
SOUTH
);
Cat
cat
=
new
Cat
();
//注册事件
jb1
.
addActionListener
(
cat
);
jb1
.
setActionCommand
(
"aa"
);
jb1
.
addActionListener
(
this
);
//指定action命令
jb1
.
setActionCommand
(
"JB1_Event"
);
jb2
.
addActionListener
(
this
);
jb2
.
setActionCommand
(
"JB2_Event"
);
this
.
setSize
(
200
,
200
);
this
.
setDefaultCloseOperation
(
JFrame
.
EXIT_ON_CLOSE
);
this
.
setVisible
(
true
);
}
@
Override
//对事件处理方法
public
void
actionPerformed
(
ActionEvent
e
) {
// TODO Auto-generated method stub
System
.
out
.
println
(
"OK"
);
if
(
e
.
getActionCommand
()==
"JB1_Event"
){
System
.
out
.
println
(
"JB1"
);
mp
.
setBackground
(
Color
.
black
);
}
else
if
(
e
.
getActionCommand
()==
"JB2_Event"
){
System
.
out
.
println
(
"JB2"
);
mp
.
setBackground
(
Color
.
red
);
}
else
{
System
.
out
.
println
(
"UnKnown event"
);
}
}
}
class
Cat
implements
ActionListener
{
@
Override
public
void
actionPerformed
(
ActionEvent
e
) {
// TODO Auto-generated method stub
if
(
e
.
getActionCommand
().
equals
(
"aa"
)){
System
.
out
.
println
(
"猫猫也知道按下黑色按钮！"
);
}
else
if
(
e
.
getActionCommand
().
equals
(
"bb"
)){
System
.
out
.
println
(
"猫猫也知道按下红色按钮！"
);
}
System
.
out
.
println
(
"猫猫！"
);
}
}
//class Mypanel extends JPanel{
// public void paint(Graphics g){
//
// }
//}
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