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来自 , 2020-06-06, 写在 Java, 查看 177 次.
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//1510821001廖益利
//练习三 读懂小球撞壁代码,并完善.txt(已完成100%)
import
java.awt.Frame
;
import
java.awt.Graphics
;
import
java.awt.Panel
;
public
class
pp
{
public
static
void
main
(
String
args
[
]
)
{
Frame
w
=
new
Frame
(
)
;
MyPanel mp
=
new
MyPanel
(
)
;
w.
add
(
mp
)
;
Thread
th
=
new
Thread
(
mp
)
;
th.
start
(
)
;
w.
setSize
(
300
,
400
)
;
w.
show
(
)
;
}
}
class
MyPanel
extends
Panel
implements
Runnable
{
int
y
=
30
;
int
x
=
30
;
int
att
=
0
;
public
void
paint
(
Graphics
g
)
{
//while(true){
g.
fillOval
(
x, y,
20
,
20
)
;
//}
}
@Override
public
void
run
(
)
{
// TODO Auto-generated method stub
while
(
true
)
{
// 定义飞行姿态
if
(
att
==
0
)
{
x
++;
y
++;
}
else
if
(
att
==
1
)
{
x
--;
y
++;
}
else
if
(
att
==
2
)
{
x
--;
y
--;
}
else
if
(
att
==
3
)
{
x
++;
y
--;
}
// 改变飞行姿态
if
(
x
>
260
&&
y
<
360
)
{
//263+20=283,横坐标占用了17个像素,x>263有两种可能,左下或者右上
if
(
att
==
0
)
att
=
1
;
else
att
=
2
;
}
else
if
(
x
<
260
&&
y
>
360
)
{
if
(
att
==
1
)
att
=
2
;
else
att
=
3
;
}
else
if
(
x
<
0
&&
y
<
360
)
{
if
(
att
==
2
)
att
=
3
;
else
att
=
0
;
}
else
if
(
x
<
270
&&
y
<
0
)
{
if
(
att
==
3
)
att
=
0
;
else
att
=
1
;
}
try
{
Thread
.
sleep
(
8
)
;
}
catch
(
Exception
e
)
{
}
repaint
(
)
;
}
}
}
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//1510821001廖益利 //练习三 读懂小球撞壁代码,并完善.txt(已完成100%) import java.awt.Frame; import java.awt.Graphics; import java.awt.Panel; public class pp{ public static void main(String args[]){ Frame w = new Frame(); MyPanel mp = new MyPanel(); w.add(mp); Thread th = new Thread(mp); th.start(); w.setSize(300,400); w.show(); } } class MyPanel extends Panel implements Runnable{ int y=30; int x=30; int att=0; public void paint(Graphics g){ //while(true){ g.fillOval(x, y, 20, 20); //} } @Override public void run() { // TODO Auto-generated method stub while(true){ // 定义飞行姿态 if (att == 0) { x++; y++; }else if (att == 1) { x--; y++; }else if (att == 2) { x--; y--; }else if (att == 3) { x++; y--; } // 改变飞行姿态 if (x > 260&&y<360) { //263+20=283,横坐标占用了17个像素,x>263有两种可能,左下或者右上 if(att == 0) att=1; else att=2; } else if (x < 260&&y>360){ if(att==1) att = 2; else att=3; } else if (x < 0&&y<360){ if(att==2) att = 3; else att=0; }else if (x < 270&&y<0){ if(att==3) att = 0; else att=1; } try{ Thread.sleep(8) ; }catch(Exception e){ } repaint() ; } } }
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