java程序设计教程第六版课后习题答案.docx
《java程序设计教程第六版课后习题答案.docx》由会员分享，可在线阅读，更多相关《java程序设计教程第六版课后习题答案.docx（29页珍藏版）》请在冰豆网上搜索。
java程序设计教程第六版课后习题答案
pp2.3
publicclassfudian{
publicstaticvoidmain（String[]args）{
floata=2.10f,b=3.70f;
floatResult1,Result2,Result3;
Result1=a+b;
Result2=a-b;
Result3=a*b;
System.out.println（"Result1is:
"+Result1）;
System.out.println（"Result2is:
"+Result2）;
System.out.println（"Result3is:
"+Result3）;
}
}
2.4
publicclassTempConverter{
publicstaticvoidmain（String[]args）{
finalintBASE=32;
finaldoubleCONVERSION_FACTOR=5.0/9.0;
doublecelsiusTemp;
intfahrenheitTemp=70;//valuetoconvert
celsiusTemp=（fahrenheitTemp-BASE）*CONVERSION_FACTOR;
System.out.println（"FahrenheitEquivalent:
"+fahrenheitTemp）;
System.out.println（"CelsiusTemperature:
"+celsiusTemp）;
}
}
2.5
publicclassyinglizhuanqianmi{
publicstaticvoidmain（String[]args）{
floatBase=1.60935f;
floatQianmi;
floatYingli=19.85f;
Qianmi=Yingli*Base;
System.out.println（"YingLi:
"+Yingli）;
System.out.println（"QianMi:
"+Qianmi）;
}
}
2.6
publicclassTimeConverter1{
publicstaticvoidmain（String[]args）{
intHour=5,Minute=35,Second=51;
intSECONDS;
SECONDS=Hour*60*60+Minute*60+Second;
System.out.println（+Hour+"时"+Minute+"分"+Second+"秒"）;
System.out.println（"换算成秒:
"+SECONDS）;
}
}
2.7
publicclassTimeConverter2{
publicstaticvoidmain（String[]args）{
intSECONDS=10853;
intHour,Minute,Second;
Second=SECONDS%60;
Minute=（SECONDS-Second）%60;
Hour=（SECONDS-Second-Minute*60）/3600;
System.out.println（SECONDS+"秒，转化为"）;
System.out.println（Hour+"时"+Minute+"分"+Second+"秒"）;
}
}
2.9
importjava.util.*;
publicclassDollarbill{
publicstaticvoidmain（String[]args）{
floatDollar1,Dollar2;
intTen,Five,One,Quarters,Dimes,Nickles,Pennies;
Scannerreader=newScanner（System.in）;
System.out.println（"输入币值：
"）;
Dollar1=reader.nextFloat（）;
Dollar2=Dollar1*100;
Pennies=（int）Dollar2%5;
Nickles=（（int）Dollar2%10-Pennies）/5;
Dimes=（（int）Dollar2-Pennies-Nickles*5）%50/10;
Quarters=（int）Dollar2%100/50;
One=（（int）Dollar2-Pennies-Nickles*5-Dimes*10-Quarters*50）%500/100;
Five=（int）Dollar2%1000/500;
Ten=（int）Dollar2/1000;
System.out.println（Ten+"tendollarbills"）;
System.out.println（Five+"fivedollarbills"）;
System.out.println（One+"onedollarbills"）;
System.out.println（Quarters+"quartersdollarbills"）;
System.out.println（Dimes+"dimesdollarbills"）;
System.out.println（Nickles+"nicklesdollarbills"）;
System.out.println（Pennies+"penniesdollarbills！
"）;
}
}
2.11
importjava.util.*;
publicclassFenshuzhuanhuan{
publicstaticvoidmain（String[]args）{
intx,y;
doubleResult=0;
Scannerreader=newScanner（System.in）;
System.out.println（"输入x：
"）;
x=reader.nextInt（）;
System.out.println（"输入y：
"）;
y=reader.nextInt（）;
Result+=x/y;
System.out.println（"分数"+x+"/"+y）;
System.out.println（"转换成小数是:
"+Result）;
}
}
2.16
importjavax.swing.JApplet;
importjava.awt.*;
publicclassOlympiclogoextendsJApplet{
publicvoidpaint（Graphicspage）{
page.setColor（Color.blue）;
page.drawOval（25,65,40,40）;
page.setColor（Color.yellow）;
page.drawOval（55,65,40,40）;
page.setColor（Color.black）;
page.drawOval（85,65,40,40）;
page.setColor（Color.green）;
page.drawOval（115,65,40,40）;
page.setColor（Color.red）;
page.drawOval（145,65,40,40）;//circle
page.setColor（Color.cyan）;
page.drawString（"OLYMPICLOGO",40,30）;
}
}
2.19
importjava.applet.*;
importjava.awt.*;
publicclassEx2_19extendsApplet{
publicvoidpaint（Graphicspage）{
page.setColor（Color.BLACK）;
page.setFont（newFont（"楷体",Font.ITALIC+Font.BOLD,30））;
page.drawString（"林少锋",40,30）;
page.setColor（Color.blue）;
page.setFont（newFont（"宋体",Font.BOLD,30））;
page.drawString（"林少锋",70,80）;
}
}
2.20
importjava.applet.*;
importjava.awt.*;
publicclassEx2_20extendsApplet{
publicvoidpaint（Graphicspage）{
page.drawOval（35,35,130,130）;
page.setColor（Color.red）;
page.fillArc（35,35,130,130,0,45）;
page.setColor（Color.blue）;
page.fillArc（35,35,130,130,45,45）;
page.setColor（Color.yellow）;
page.fillArc（35,35,130,130,90,45）;
page.setColor（Color.cyan）;
page.fillArc（35,35,130,130,135,45）;
page.setColor（Color.gray）;
page.fillArc（35,35,130,130,180,45）;
page.setColor（Color.green）;
page.fillArc（35,35,130,130,225,45）;
page.setColor（Color.darkGray）;
page.fillArc（35,35,130,130,270,45）;
page.setColor（Color.pink）;
page.fillArc（35,35,130,130,315,45）;
}
}
PP4.1
方法1
importjava.util.*;
publicclassCreateSphere{
/**
*@paramargs
*/
publicstaticvoidmain（String[]args）{
//TODO自动生成方法存根
System.out.println（"请输入直径d：
"）;
Scannerscan=newScanner（System.in）;
doubled=scan.nextDouble（）;
SphereD=newSphere（d）;
D.Square（）;
D.Volum（）;
System.out.println（D.toString（））;
}
}
publicclassSphere{
finaldoublePI=3.14;
升级会员 