面向?qū)ο蠹夹g(shù)Java期末復(fù)習(xí)試卷(五)

1、文檔供參考，可復(fù)制、編制，期待您的好評與關(guān)注！ 期末復(fù)習(xí)試卷（五）一、 程序題1、請根據(jù)UML圖，代碼實(shí)現(xiàn)Person類、Student類和Volunteer接口的定義。解題要求：編寫測試程序，創(chuàng)建一個名為”Tom”的一年級學(xué)生，這名學(xué)生參加了“北京青年志愿者協(xié)會”的活動。輸出該學(xué)生的姓名、年級及所屬社團(tuán)的信息。效果如下：interface Volunteer  public abstract String volunteer(String organization);class Person  private String name; 

2、60; public Person()     public Person(String name)     = name;     Override  public String toString()    return "姓名" + + "n"  class Student extend

3、s Person implements Volunteer  private int grade;   public static final int FRESHMAN = 1;  public static final int SOPHOMORE = 2;  public static final int JUNIOR = 3;  public static final int SENIOR = 4;    public Student(String n

4、ame, int grade)    super(name);    this.grade = grade;     Override  public String toString()    return super.toString() +           "年級" +

5、this.grade + "n"     Override  public String volunteer(String organization)    return organization;  public class Test  public static void main(String args)    Student student = new Student("

6、;Tom",1);        System.out.println(student + "所屬社團(tuán)" + student.volunteer("北京青年志愿者協(xié)會") + "n");   2、根據(jù)給定的GeometricObject類層次圖，分別實(shí)現(xiàn)GeometricObject、Circle和Triangle類。要求：（1） 按照類圖，定義各類的數(shù)據(jù)域?qū)傩院头椒?。?） 默認(rèn)的GeometricObject的顏

7、色為white。默認(rèn)的Circle對象的半徑為10。默認(rèn)的Triangle對象的三邊為（3，4，5）。（3） GeometricObject類的toString()方法，返回對象的顏色信息。Circle和Triangle的toString()方法，覆蓋父類的toString()，分別返回包括顏色信息、半徑或邊長的信息。（4） GeometricObject類實(shí)現(xiàn)java.lang.Comparable接口，覆蓋public int compareTo()方法，實(shí)現(xiàn)兩個幾何對象在周長上的比較。（5） Circle和Triangle類分別覆蓋實(shí)現(xiàn)getPerimeter()。編寫一個用戶程序:（1

8、）創(chuàng)建一個幾何對象數(shù)組object；（2）分別存放一個默認(rèn)的圓、一個半徑為20的圓、一個默認(rèn)的三角形和一個三邊為（10，20，15）的三角形；（3）計(jì)算這一組幾何對象的總周長并輸出；（4）使用toString(),輸出每個幾何對象的相關(guān)信息；（5）使用java.util.Arrays.sort()方法，對幾何對象數(shù)組中的幾何圖形，按周長進(jìn)行排序，并輸出排序結(jié)果。解題要求：寫出程序代碼。定義一個Java源文件，名為Test.java，其中包括：用戶類Test、GeometricObject類、Circle類和Triangle類的定義。abstract class GeometricObject

9、implements Comparable<geometricobject> private String color = "white" protected GeometricObject() protected GeometricObject(String color) this.color = color; public String getColor() return color; public void setColor(String color) this.color = color; Override public int compareTo(Ge

10、ometricObject o) if (this.getPerimeter() > o.getPerimeter() return 1; else if (this.getPerimeter() < o.getPerimeter() return -1; else return 0; public String toString() return "顏色" + color + "n" public abstract double getPerimeter();class Circle extends GeometricObject priv

11、ate double radius; public Circle() this.radius = 10.0; public Circle(double radius) this.radius = radius; public Circle(String color, double radius) super(color); this.radius = radius; public double getRadius() return radius; public void setRadius(double radius) this.radius = radius; Override public

12、 double getPerimeter() return 2 * radius * Math.PI; public String toString() return super.toString() + "圓的半徑是" + radius + "n" class Triangle extends GeometricObject private double side1; private double side2; private double side3; public Triangle() this.side1 = 3.0; this.side2 =

13、4.0; this.side3 = 5.0; public Triangle(double side1 ,double side2, double side3) this.side1 = side1; this.side2 = side2; this.side3 = side3; public Triangle(String color,double side1 ,double side2, double side3) super(color); this.side1 = side1; this.side2 = side2; this.side3 = side3; Override publi

14、c double getPerimeter() return side1 + side2 + side3; Override public String toString() return super.toString() + "三角形的三條邊是" + side1 + " " + side2 + " " + side3 + "n" public class Test public static void main(String args) /創(chuàng)建對象數(shù)組 GeometricObject object = new C

15、ircle(), new Circle(20), new Triangle(), new Triangle(10,20,15); double totalPerimeter = 0; /自己學(xué)習(xí)一下這種for循環(huán)的使用方法 for(GeometricObject go:object) totalPerimeter += go.getPerimeter(); System.out.println("The total perimeter is " + totalPerimeter); for(GeometricObject go:object) System.out.prin

16、tln(go.toString(); /*抽象類GeometricObject實(shí)現(xiàn)了Comparable接口之后，所有子類（Circle和Triangle）的對象 就可以比較大小了，由此也就可以調(diào)用Arrays的sort方法對上面的對象數(shù)組排序了。 */ java.util.Arrays.sort(object); for(int i = 0; i < object.length; i+) System.out.println("The " + i + "th short perimeter is " + objecti.getPerimeter(

17、); 3、根據(jù)UML圖，實(shí)現(xiàn)Person類、Faculty類和Volunteer接口的定義。解題要求：編寫用戶測試程序，創(chuàng)建一個名為“Jerry”的副教授, 他參加了“北京市慈善義工協(xié)會”的活動，輸出其姓名、職稱和所屬社團(tuán)信息。效果如下：class Person private String name; public Person() public Person(String name) = name; Override public String toString() return "姓名" + + "n" &#

18、160;interface Volunteer     public abstract String volunteer(String organization); class Faculty extends Person implements Volunteer private String title; public static final String TEACHING_ASSISTANT = "助教" public static final String LECTURER = "講師"

19、 public static final String ASSOCIATE_PROFESSOR = "副教授" public static final String PROFESSOR = "教授" public Faculty(String name,String title) super(name); this.title = title; Override public String toString() return super.toString() + "職稱" + this.title + "n" Ov

20、erride public String volunteer(String organization) return organization; public class TestPerson public static void main(String args) Faculty faculty = new Faculty("Jerry","副教授"); System.out.println(faculty + "所屬社團(tuán)" + faculty.volunteer("北京市慈善義工協(xié)會"); 4、請根據(jù)UML圖,

21、給出類Person 、類Student、Faculty類和接口Volunteer的定義實(shí)現(xiàn)。解題要求：編寫測試程序，創(chuàng)建一個名為“Tom”的一年級學(xué)生、“北京青年志愿者協(xié)會”成員，創(chuàng)建一個名為“JERRY”的助教、“北京市慈善義工協(xié)會”成員，輸出兩個人的姓名、年級和所屬志愿者協(xié)會的基本信息。效果如下：interface Volunteer  public abstract String volunteer(String organization);class Person private String name; public Person() public Person(

22、String name) = name; Override public String toString() return "姓名" + + "n" class Student extends Person implements Volunteer private int grade; public static final int FRESHMAN = 1; public static final int SOPHOMORE = 2; public static final int JUNIOR = 3; pub

23、lic static final int SENIOR = 4; public Student(String name, int grade) super(name); this.grade = grade; Override public String toString() return super.toString() + "年級" + this.grade + "n" Override public String volunteer(String organization) return organization; class Faculty extends Person implements Volunteer private String title; public static final String TEACHING_ASSISTANT = "助教" public static final