java程序设计教程部分答案3Word格式.docx
《java程序设计教程部分答案3Word格式.docx》由会员分享，可在线阅读，更多相关《java程序设计教程部分答案3Word格式.docx（30页珍藏版）》请在冰豆网上搜索。
}
importjava.awt.BorderLayout;
importjava.awt.Color;
importjava.awt.Component;
importjava.awt.FlowLayout;
importjava.awt.Graphics;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjavax.swing.Box;
importjavax.swing.BoxLayout;
importjavax.swing.JButton;
importjavax.swing.JLabel;
importjavax.swing.JPanel;
importjavax.swing.JTextField;
publicclassAeiouPanelextendsJPanel{
privateJLabelinput,label1,label2,label3,label4,label5,label6;
privateJTextFieldtext;
privateJButtonsure,exit;
privateJPanelpanel,panel1;
privatefinalintN=60,WITH=30;
publicAeiouPanel（）{
input=newJLabel（"
InputCharacter:
"
text=newJTextField（15）;
sure=newJButton（"
确定"
exit=newJButton（"
退出"
panel=newJPanel（）;
panel1=newJPanel（）;
label1=newJLabel（"
a:
label2=newJLabel（"
e:
label3=newJLabel（"
i:
label4=newJLabel（"
o:
label5=newJLabel（"
u:
label6=newJLabel（"
其它字符:
AeiouListenerlistener=newAeiouListener（）;
sure.addActionListener（listener）;
exit.addActionListener（listener）;
panel.setLayout（newFlowLayout（））;
panel.setBackground（Color.cyan）;
panel.add（input）;
panel.add（text）;
panel.add（sure）;
panel.add（exit）;
panel1.setLayout（newBoxLayout（panel1,BoxLayout.Y_AXIS））;
panel1.setBackground（Color.cyan）;
panel1.add（label1）;
panel1.add（Box.createRigidArea（newDimension（0,20）））;
panel1.add（label2）;
panel1.add（label3）;
panel1.add（label4）;
panel1.add（label5）;
panel1.add（label6）;
setLayout（newBorderLayout（））;
add（panel,BorderLayout.NORTH）;
add（panel1,BorderLayout.EAST）;
setBackground（Color.cyan）;
setPreferredSize（newDimension（500,500））;
privateclassAeiouListenerimplementsActionListener{
publicvoidactionPerformed（ActionEvente）{
if（e.getSource（）==sure）
repaint（）;
if（e.getSource（）==exit）{
System.exit（0）;
}
}
publicvoidpaintComponent（Graphicspage）{
super.paintComponent（page）;
Stringa=text.getText（）;
intj=0,l=0,m=0,n=0,k=0,p=0;
for（inti=0;
i<
a.length（）;
i++）{
switch（a.charAt（i））{
case'
a'
:
j++;
break;
e'
l++;
i'
m++;
o'
n++;
u'
p++;
default:
k++;
label1.setText（"
+j）;
label2.setText（"
+l）;
label3.setText（"
+m）;
label4.setText（"
+n）;
label5.setText（"
+p）;
label6.setText（"
+k）;
intx=50,y=50,x1=75;
page.setColor（Color.black）;
page.drawLine（x,400,450,400）;
page.drawLine（x,y,x,400）;
page.setColor（Color.red）;
page.fillRect（x1,400-10*j,WITH,10*j）;
page.setColor（Color.blue）;
page.fillRect（x1+N,400-10*l,WITH,10*l）;
page.setColor（Color.green）;
page.fillRect（x1+2*N,400-10*m,WITH,10*m）;
page.setColor（Color.yellow）;
page.fillRect（x1+3*N,400-10*n,WITH,10*n）;
page.setColor（Color.gray）;
page.fillRect（x1+4*N,400-10*p,WITH,10*p）;
page.setColor（Color.pink）;
page.fillRect（x1+5*N,400-10*k,WITH,10*k）;
运行界面截图：
输入前界面：
输入后界面：
Pp5.22画100个随机圆。
packageDrawCircle;
publicclassDrawCircle{
Circles"
frame.setSize（350,375）;
CirclePanelpanel=newCirclePanel（）;
importjava.util.Random;
importDrawCircle1.CirclePanel1.CircleListner;
publicclassCirclePanelextendsJPanel{
privatestaticfinallongserialVersionUID=1L;
privatefinalintNUMCIRCLES=100,MAXRADIOUS=100;
privatefinalintMAX_X=250,MAX_Y=250;
privateRandomgenerator;
privateJButtonagain,exit;
privateJPanelpanel;
publicCirclePanel（）{
generator=newRandom（）;
again=newJButton（"
again"
exit=newJButton（"
exit"
panel=newJPanel（）;
panel.setLayout（newBoxLayout（panel,BoxLayout.X_AXIS））;
panel.add（again）;
panel.add（Box.createHorizontalGlue（））;
panel.setBackground（Color.green）;
add（panel,BorderLayout.SOUTH）;
CircleListnerlistener=newCircleListner（）;
again.addActionListener（listener）;
setBackground（Color.green）;
setPreferredSize（newDimension（350,375））;
publicclassCircleListnerimplementsActionListener{
publicvoidactionPerformed（ActionEventevent）{
if（event.getSource（）==again）{
if（event.getSource（）==exit）{
intx,y,radious;
for（intcount=0;
count<
NUMCIRCLES;
count++）{
x=generator.nextInt（MAX_X）+1;
y=generator.nextInt（MAX_Y）+1;
radious=generator.nextInt（MAXRADIOUS）+1;
if（radious<
=35）{
page.setColor（Color.blue）;
page.drawOval（x,y,radious,radious）;
else
=70）{
page.setColor（Color.yellow）;
{
page.setColor（Color.red）;
运行界面截图
Pp5.29画点。
packageDrawDots;
publicclassDrawDots{
JFrameframe=newJFrame（）;
DotPanelpanel=newDotPanel（）;
publicclassDotPanelextendsJPanel{
/**
*
*/
privatefinalintMAXDOTS=20000,BOUNDARY=250,MAXSIDE=500,WIDTH=1;
publicDotPanel（）{
DotListnerlistener=newDotListner（）;
publicclassDotListnerimplementsActionListener{
intx,y;
MAXDOTS;
x=generator.nextInt（MAXSIDE）+1;
y=generator.nextInt（MAXSIDE）+1;
if（x<
=BOUNDARY）{
page.fillRect（x,y,WIDTH,WIDTH）;
page.setColor（Color.green）;
Pp5.30画10个随机圆。
packageDrawCircle1;
publicclassDrawCircle1{
frame.setSize（350,450）;
CirclePanel1panel=newCirclePanel1（）;
f
升级会员 