java web编程技术沈泽刚清华大学出版社第十四章课后习题部分解答.docx
《java web编程技术沈泽刚清华大学出版社第十四章课后习题部分解答.docx》由会员分享，可在线阅读，更多相关《java web编程技术沈泽刚清华大学出版社第十四章课后习题部分解答.docx（12页珍藏版）》请在冰豆网上搜索。
javaweb编程技术沈泽刚清华大学出版社第十四章课后习题部分解答
Book14_1
publicclassBook14_1{
publicstaticvoidmain（String[]args）{
GeometricObjectgeoObject1=newCircle（5）;
GeometricObjectgeoObject2=newRectangle（5,3）;
System.out.println（"Thetwoobjectshavethesamearea?
"+
equalArea（geoObject1,geoObject2））;
displayGeometricObject（geoObject1）;
displayGeometricObject（geoObject2）;
}
publicstaticbooleanequalArea（GeometricObjectobject1,GeometricObjectobject2）{
returnobject1.getArea（）==object2.getArea（）;
}
publicstaticvoiddisplayGeometricObject（GeometricObjectobject）{
System.out.println（）;
System.out.println（"Theareais"+object.getArea（））;
System.out.println（"Theperimeteris"+object.getPerimeter（））;
}
}
abstractclassGeometricObject{
privateStringcolor="white";
privatebooleanfilled;
privatejava.util.DatedateCreated;
protectedGeometricObject（）{
dateCreated=newjava.util.Date（）;
}
protectedGeometricObject（Stringcolor,booleanfilled）{
dateCreated=newjava.util.Date（）;
this.color=color;
this.filled=filled;
}
publicStringgetColor（）{
returncolor;
}
publicvoidsetColor（Stringcolor）{
this.color=color;
}
publicbooleanisFilled（）{
returnfilled;
}
publicvoidsetFilled（booleanfilled）{
this.filled=filled;
}
publicjava.util.DategetDateCreated（）{
returndateCreated;
}
publicStringtoString（）{
return"createdon"+dateCreated+"\ncolor:
"+color+"andfilled:
"+filled;
}
publicabstractdoublegetArea（）;
publicabstractdoublegetPerimeter（）;
}
classCircleextendsGeometricObject{
privatedoubleradius;
publicCircle（）{
}
publicCircle（doubleradius）{
this.radius=radius;
}
publicCircle（doubleradius,Stringcolor,booleanfilled）{
this.radius=radius;
setColor（color）;
setFilled（filled）;
}
publicdoublegetRadius（）{
returnradius;
}
publicvoidsetRadius（doubleradius）{
this.radius=radius;
}
publicdoublegetArea（）{
returnradius*radius*Math.PI;
}
publicdoublegetPerimeter（）{
return2*radius*Math.PI;
}
publicvoidprintCircle（）{
System.out.println（"Thecircleiscreated"+getDateCreated（）+
"andtheradiusis"+radius）;
}
}
classRectangleextendsGeometricObject{
privatedoublewidth;
privatedoubleheight;
publicRectangle（）{
}
publicRectangle（doublewidth,doubleheight）{
this.width=width;
this.height=height;
}
publicRectangle（doublewidth,doubleheight,Stringcolor,booleanfilled）{
this.width=width;
this.height=height;
setColor（color）;
setFilled（filled）;
}
publicdoublegetWidth（）{
returnwidth;
}
publicvoidsetWidth（doublewidth）{
this.width=width;
}
publicdoublegetHeight（）{
returnheight;
}
publicvoidsetHeight（doubleheight）{
this.height=height;
}
publicdoublegetArea（）{
returnwidth*height;
}
publicdoublegetPerimeter（）{
return2*（width+height）;
}
}
Book14_5
importjava.util.*;
publicclassBook14_5{
publicstaticvoidmain（String[]args）{
Calendarcalendar=newGregorianCalendar（）;
System.out.println（"Currenttimeis"+newDate（））;
System.out.println（"YEAR:
\t"+calendar.get（Calendar.YEAR））;
System.out.println（"MONTH:
\t"+calendar.get（Calendar.MONTH））;
System.out.println（"DATE:
\t"+calendar.get（Calendar.DATE））;
System.out.println（"HOUR:
\t"+calendar.get（Calendar.HOUR））;
System.out.println（"HOUR_OF_DAY:
\t"+calendar.get（Calendar.HOUR_OF_DAY））;
System.out.println（"MINUTE:
\t"+calendar.get（Calendar.MINUTE））;
System.out.println（"SECOND:
\t"+calendar.get（Calendar.SECOND））;
System.out.println（"DAY_OF_WEEK:
\t"+calendar.get（Calendar.DAY_OF_WEEK））;
System.out.println（"DAY_OF_MONTH:
\t"+calendar.get（Calendar.DAY_OF_MONTH））;
System.out.println（"DAY_OF_YEAR:
\t"+calendar.get（Calendar.DAY_OF_YEAR））;
System.out.println（"AM_PM:
"+calendar.get（Calendar.AM_PM））;
Calendarcalendar1=newGregorianCalendar（2001,8,11）;
System.out.println（"September11,2001isa"+dayNameOfWeek（calendar1.get（Calendar.DAY_OF_WEEK）））;
}
publicstaticStringdayNameOfWeek（intdayOfWeek）{
switch（dayOfWeek）{
case1:
return"Sunday";
case2:
return"Monday";
case3:
return"Tuesday";
case4:
return"Wednesday";
case5:
return"Thursday";
case6:
return"Friday";
case7:
return"Saturday";
default:
returnnull;
}
}
}
Book14_6
publicclassBook14_6{
publicstaticvoidmain（String[]args）{
Object[]objects={newTiger（）,newChicken（）,newApple（）};
for（inti=0;iif（objects[i]instanceofEdible）
System.out.println（（（Edible）objects[i]）.howToEat（））;
}
}
interfaceEdible{
publicabstractStringhowToEat（）;
}
classAnimal{
}
classChickenextendsAnimalimplementsEdible{
publicStringhowToEat（）{
return"Chicken:
Fryit";
}
}
classTigerextendsAnimal{
}
abstractclassFruitimplementsEdible{
}
classAppleextendsFruit{
publicStringhowToEat（）{
return"Apple:
Makeapplecider";
}
}
classOrangeextendsFruit{
publicStringhowToEat（）{
return"Orange:
Makeorangejuice";
}
}
Book14_7
importjava.util.*;
publicclassBook14_7{
publicstaticvoidmain（String[]args）{
ComparableRectanglerectangle1=newComparableRectangle（4,5）;
ComparableRectanglerectangle2=newComparableRectangle（3,6）;
System.out.println（Max.max（rectangle1,rectangle2））;
}
}
classComparableRectangleextendsRectangleimplementsComparable{
publicComparableRectangle（doublewidth,doubleheight）{
super（width,height）;
}
publicintcompareTo（Objecto）{
if（getArea（）>（（ComparableRectangle）o）.getArea（））
return1;
elseif（getArea（）<（（ComparableRectangle）o）.getArea（））
return-1;
else
return0;
}
}
classMax{
publicstaticComparablemax（Comparableo1,Comparableo2）{
if（pareTo（o2）>0）
returno1;
else
returno2;
}
}
classRectangleextendsGeometricObject{
privatedoublewidth;
privatedoubleheight;
publicRectangle（）{
}
publicRectangle（doublewidth,doubleheight）{
this.width=width;
this.height=height;
}
publicRectangle（doublewidth,doubleheight,Stringcolor,booleanfilled）{
this.width=width;
this.height=height;
setColor（color）;
setFilled（filled）;
}
publicdoublegetWidth（）{
returnwidth;
}
publicvoidsetWidth（doublewidth）{
this.width=width;
}
publicdoublegetHeight（）{
returnheight;
}
publicvoidsetHeight（doubleheight）{
this.height=height;
}
publicdoublegetArea（）{
returnwidth*height;
}
publicdoublegetPerimeter（）{
return2*（width+height）;
}
}
abstractclassGeometricObject{
privateStringcolor="white";
privatebooleanfilled;
privatejava.util.DatedateCreated;
protectedGeometricObject（）{
dateCreated=newjava.util.Date（）;
}
protectedGeometricObject（Stringcolor,booleanfilled）{
dateCreated=newjava.util.Date（）;
this.color=color;
this.filled=filled;
}
publicStringgetColor（）{
returncolor;
}
publicvoidsetColor（Stringcolor）{
this.color=color;
}
publicbooleanisFilled（）{
returnfilled;
}
publicvoidsetFilled（booleanfilled）{
this.filled=filled;
}
publicjava.util.DategetDateCreated（）{
returndateCreated;
}
publicStringtoString（）{
return"createdon"+dateCreated+"\ncolor:
"+color+"andfilled:
"+filled;
}
publicabstractdoublegetArea（）;
publicabstractdoublegetPerimeter（）;
}
Book14_8
importjavax.swing.*;
importjava.awt.event.*;
publicclassBook14_8{
publicstaticvoidmain（String[]args）{
JFrameframe=newHandleEvent（）;
frame.setTitle（"HandleEvent"）;
frame.setSize（200,150）;
frame.setLocation（200,100）;
frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）;
frame.setVisible（true）;
}
}
classHandleEventextendsJFrame{
publicHandleEvent（）{
JButtonjbtOk=newJButton（"OK"）;
JButtonjbtCancel=newJButton（"Cancel"）;
JPanelpanel=newJPanel（）;
panel.add（jbtOk）;
panel.add（jbtCancel）;
add（panel）;
OKListenerClasslistener1=newOKListenerClass（）;
CancelListenerClasslistener2=newCancelListenerClass（）;
jbtOk.addActionListener（listener1）;
jbtCancel.addActionListener（listener2）;
}
}
classOKListenerClassimplementsActionListener{
publicvoidactionPerformed（ActionEvente）{
System.out.println（"Okbuttonclicked"）;
}
}
classCancelListenerClassimplementsActionListener{
publicvoidactionPerformed（ActionEvente）{
System.out.println（"cancelbuttonclicked"）;
}
}
Book14_9
importjavax.swing.*;
importjava.awt.event.*;
publicclassBook14_9{
publicstaticvoidmain（String[]args）throwsCloneNotSupportedException{
Househouse1=newHouse（1,1750.50）;
Househouse2=（House）house1.clone（）;
System.out.println（"house1==house?
:
"+（house1==house2））;
System.out.println（"house1equalstohouse2?
:
"+house1.equals（house2））;
}
}
classHouseimplementsCloneable,Comparable{
privateintid;
privatedoublearea;
privatejava.util.DatewhenBuilt;
publicHouse（intid,doublearea）{
this.id=id;
this.area=area;
whenBuilt=newjava.util.Date（）;
}
publicintgetId（）{
returnid;
}
publicdoublegetArea（）{
returnarea;
}
publicjava.util.DategetWhenBuilt（）{
returnwhenBuilt;
}
publicObjectclone（）throwsCloneNotSupportedException{
super.clone（）;
whenBuilt.clone（）;
returnthis;
}
publicintcompareTo（Objecto）{
if（area>（（House）o）.area）
return1;
elseif（area<（（House）o）.area）
return-1;
else
return0;
}
}
升级会员 