java程序设计教程第六版课后习题答案.docx

1、java程序设计教程第六版课后习题答案pp2.3public class fudian public static void main(String args) float a=2.10f,b=3.70f; float Result1,Result2,Result3; Result1=a+b; Result2=a-b; Result3=a*b; System.out.println(Result1 is:+Result1); System.out.println(Result2 is:+Result2); System.out.println(Result3 is:+Result3); 2.4

2、public class TempConverter public static void main(String args) final int BASE = 32; final double CONVERSION_FACTOR = 5.0 / 9.0; double celsiusTemp; int fahrenheitTemp = 70; / value to convert celsiusTemp = (fahrenheitTemp - BASE)*CONVERSION_FACTOR; System.out.println (Fahrenheit Equivalent: + fahre

3、nheitTemp); System.out.println (Celsius Temperature: + celsiusTemp);2.5public class yinglizhuanqianmi public static void main(String args) float Base=1.60935f; float Qianmi; float Yingli=19.85f; Qianmi=Yingli*Base; System.out.println (Ying Li: + Yingli); System.out.println (Qian Mi: +Qianmi); 2.6pub

4、lic class TimeConverter1 public static void main(String args) int Hour=5,Minute=35,Second=51; int SECONDS; SECONDS=Hour*60*60+Minute*60+Second; System.out.println (+Hour+时+Minute+分+Second+秒); System.out.println (换算成秒: + SECONDS); 2.7public class TimeConverter2 public static void main(String args) in

5、t SECONDS=10853; int Hour,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); 2.9import java.util.*;public class Dollarbill public static void main(String args) float Do

6、llar1,Dollar2; int Ten,Five,One,Quarters,Dimes,Nickles,Pennies; Scanner reader=new Scanner(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)D

7、ollar2%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+ ten dollar bills); System.out.println(Five+ five dollar bills); System.out.println(One+ one dollar bills); System.out.println(Quarters+ quarter

8、s dollar bills); System.out.println(Dimes+ dimes dollar bills); System.out.println(Nickles+ nickles dollar bills); System.out.println(Pennies+ pennies dollar bills！); 2.11import java.util.*;public class Fenshuzhuanhuan public static void main(String args) int x,y; double Result=0; Scanner reader=new

9、 Scanner(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); 2.16import javax.swing.JApplet;import java.awt.*;public class Olympiclogo extends JApplet public void p

10、aint (Graphics page) 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

11、 (145, 65, 40, 40);/ circle page.setColor(Color.cyan); page.drawString (OLYMPIC LOGO, 40, 30); 2.19import java.applet.*;import java.awt.*;public class Ex2_19 extends Applet public void paint (Graphics page) page.setColor(Color.BLACK); page.setFont(new Font(楷体,Font.ITALIC+Font.BOLD,30); page.drawStri

12、ng (林少锋, 40, 30); page.setColor(Color.blue); page.setFont(new Font(宋体,Font.BOLD,30); page.drawString (林少锋, 70, 80); 2.20import java.applet.*;import java.awt.*;public class Ex2_20 extends Applet public void paint (Graphics page) page.drawOval(35, 35, 130, 130); page.setColor(Color.red); page.fillArc(

13、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.setColo

14、r(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1import java.util.*;public class CreateSphere /* * param args */ public static void main(String args) / TODO 自动生成方法存根 System.out.println(请输入直径d：); Scanner scan=new Scanner(System.in); double d=scan.nextDouble(); Sphere D=new Sphere(d); D.Square(); D.Volum(); System.out.println(D.toString(); public class Sphere final double PI=3.14;