期末复习JAVA题.doc

1. 分解质因数 package d2;import java.util.Scanner;public class Zys public static void main(Stringargs)Scanner sc=new Scanner(System.in);System.out.print(请输入一个数：);int a=sc.nextInt();int n=2;System.out.println(a+=);while(a=n)if(a%n=0)System.out.print(n+*);a=a/n;if(a%n!=0)n+;2. 判断是否是回文数 ackage c2;import java.util.Scanner;public class huiwenshu public static void main(Stringargs)/System.out.println(请输入一个数);Scanner a=new Scanner(System.in);System.out.println(请输入一个数);String b=a.nextLine();boolean c=false;for(int i=0;i=0;i-)System.out.println(ai);4. 水仙花数public class sxh public static void main(Stringargs)int a,b,c;for(int i=100;i=999;i+)a=i/10%10;b=i%10;c=i/100;if(i=a*a*a+b*b*b+c*c*c)System.out.println(i);5. 素数public class Sushu public static void main(String args)for(int i=100;i=200;i+)boolean b=false;for(int j=2;j=Math.sqrt(i);j+ )if(i%j=0) b=true;break;elseb=false;if (b=false)System.out.println(i);6最大公约数和最小公倍数import java.util.Scanner;public class Sz public static void main(String args) int a, b, m;Scanner s = new Scanner(System.in);System.out.print(键入一个整数： );a = s.nextInt();System.out.print(再键入一个整数： );b = s.nextInt();deff cd = new deff();m = cd.deff(a, b);int n = a * b / m;System.out.println(最大公约数: + m);System.out.println(最小公倍数: + n);class deff public int deff(int x, int y) int t;if (x y) t = x;x = y;y = t;while (y != 0) if (x = y)return x;else int k = x % y;x = y;y = k;return x;1、题目：一个数如果恰好等于它的因子之和，这个数就称为 完数 。例如6=123.编程 找出1000以内的所有完数。public class shishu public static void main(String args) int i;for (i = 2; i = 1000; i+) int sum = 0;for (int j = 1; j = w.length) System.out.println(军队装备足够了!); return; else wsize = weapon; size+; public void attacAll() for (Weapon wea : w) if (wea != null) wea.attack(); public void moveAll() for (Weapon wea : w) if (wea != null) wea.move(); package A1;class Flighter extends Weapon public void attack() System.out.println(Flighter attacks); public void move() System.out.println(Flighter moves); public class NotSimple public static void main(String args) Army a = new Army(3); a.addWeapon(new Tank(); a.addWeapon(new Flighter(); a.addWeapon(new WarShip(); a.attacAll(); a.moveAll(); interface Assaultable abstract public void attack();interface Mobile abstract public void move();abstract class Weapon implements Assaultable, Mobile class Tank extends Weapon public void attack() System.out.println(Tank attacks); public void move() System.out.println(Tank moves); package A1;class WarShip extends Weapon public void attack() System.out.println(WarShip attacks); public void move() System.out.println(WarShip moves); class Army private Weapon w = null; private int size = 0; private Army() public Army(int i) w = new Weaponi; public void addWeapon(Weapon weapon) if (size = w.length) System.out.println(军队装备足够了!); return; else wsize = weapon; size+; public void attacAll() for (Weapon wea : w) if (wea != null) wea.attack(); public void moveAll() for (Weapon wea : w) if (wea != null) wea.move(); package A1;class Flighter extends Weapon public void attack() System.out.println(Flighter attacks); public void move() System.out.println(Flighter moves); package A1;public class NotSimple public static void main(String args) Army a = new Army(3); a.addWeapon(new Tank(); a.addWeapon(new Flighter(); a.addWeapon(new WarShip(); a.attacAll(); a.moveAll(); interface Assaultable abstract public void attack();interface Mobile abstract public void move();abstract class Weapon implements Assaultable, Mobile package A1; class Tank extends Weapon public void attack() System.out.println(Tank attacks); public void move() System.out.println(Tank moves); package A1;class WarShip extends Weapon public void attack() System.out.println(WarShip attacks); public void move() System.out.println(WarShip moves); 一个公司有2辆小汽车(car)，一辆公共汽车(bus)，其中：第一小辆汽车每天跑300公里；第二辆小汽车每天跑400公里；公共汽车每天跑500公里，已知小汽车每百公里耗油量为7升，公共汽车每百公里耗油量为10升，用接口编程计算每天所有交通工具的耗油量。public interface Vehicle int getfuel();import c1.Vehicle;public class bus implements Vehicle int kil;bus(int k1)kil=k1;public int getfuel()return(10*kil/100);import c1.Vehicle;class car implements Vehicle int kil; car(int k1)kil=k1;public int getfuel()return(7*kil/100);import c1.bus;import c1.car;import c1.pany1;import c1.Vehicle;public class pany1 Vehicle a;pany1()a=new Vehicle3;a0=new car(300);a1=new bus(500);a2=new car(400);int rf()int i=0;for(i=0;ia.length;i+)i=i+ai.getfuel();return (i);public static void main(Stringargs)pany1 c=new pany1();System.out.println(sum=+c.rf();编写创建一个box类，在其中定义三个变量表示一个立方体的长、宽和高，定义一个构造方法对这三个变量进行初始化，然后定义一个方法求立方体的体积。创建一个对象，求给定尺寸的立方体的体积。public class Box double length;double wide;double high;Box(double l,double w,double h)this.length=l;this.wide=w;this.high=h;public void volume()double v;v=length*wide*high;System.out.println(box的体积是：+v);public class Test public static void main(Stringargs)Box a=new Box(2,2,3);a.volume();定义一个学生类student，属性包括学号、班号、姓名、性别、年龄、班级总人数；方法包括获得学号、获得班号、获得姓名、获得性别、获得年龄、获得班级总人数、修改学号、修改班号、修改姓名、修改性别、修改年龄、以及一个tostring（）方法将student类中的所有属性组合成一个字符串。定义一个学生数组对象。设计程序进行测试。public class Student private String num;private String grade;private String name;private String sex;private int age;private int count ;Student(String nu,String gr,String na,String se,int ag,int co) this.num=nu; this.grade=gr;this.name=na;this.sex=se; this.age=ag; this.count=co;public String getNum() return num;public void setNum(String num) this.num = num;public String getGrade() return grade;public void setGrade(String grade) this.grade = grade;public String getName() return name;public void setName(String name) this.name = name;public String getSex() return sex;public void setSex(String sex) this.sex = sex;public int getAge() return age;public void setAge(int age) this.age = age;public int getcount() return count;public void setcount(int count) this.count = count;public String toString()return 学号+num+班号+grade+姓名+name+性别+sex+年龄+age+班级总人数+count;public class Test3 public static void main(Stringargs)Student s=new Student2; s0=new Student(130813125,信管131,张晓晓,女,20,34); s1=new Student(130813126,信管131,小高密,女,20,34); for(int i=0;i2;i+) System.out.println(si.toString(); 设计一个人员类person，其中包含一个方法pay，代表人员的工资支出。再以person类派生出教师类teacher和大学生类collegestudent其中：教师：工资支出=基本工资+授课时数*30大学生：奖学金支出将人员类定义为抽象类，pay为抽象方法，设计程序实现多态性。public abstract class Person public abstract void pay(int a,int b);public abstract void pay();public class CollegeStudent int award;public void pay(int w)this.award=w;System.out.println(CollegeStudent的奖学金支出是：+award);public class Teacher extends Personint wage;int time;int p;public void pay(int w,int t)this.wage=w;this.time=t;p=wage+time*30;System.out.println(Teacher的工资支出是：+p);Overridepublic