77 - 完数
package Main;
import java.util.*;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner cin = new Scanner(System.in);
int n = cin.nextInt();
int flag = 1;
for (int i = 2; i <= n; i++) {
int num = 1;
for (int j = 2; j < i; j++) {
if (i % j == 0)
num += j;
}
if (num == i) {
if (flag == 1) {
System.out.print(i);
flag = 0;
} else {
System.out.print("," + i);
}
}
}
cin.close();
}
}
116 - Person类
class Person {
private String name;
private String sex;
private int age;
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 void print() {
System.out.println("name:" + name + "; sex:" + sex + "; age:" + age);
}
}
117 - Person类2
class Person {
private String name;
private String sex;
private int age;
public Person(String _name, String _sex, int _age)
{
this.age = _age;
this.name = _name;
this.sex = _sex;
}
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 void print() {
System.out.println("name:" + name + "; sex:" + sex + "; age:" + age);
}
}
120 - Person类3
import java.util.Scanner;
class Person {
private String name;
private String sex;
private int age;
static private int sumage = 0;
public Person(String _name, String _sex, int _age)
{
this.age = _age;
this.name = _name;
this.sex = _sex;
sumage +=age;
}
static public int getAvgAge()
{
return sumage/3;
}
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 void print() {
System.out.println("name:" + name + "; sex:" + sex + "; age:" + age);
}
}
public class Main{
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
String name = scan.next();
String sex = scan.next();
int age = scan.nextInt();
Person p1 = new Person(name,sex,age);
name = scan.next();
sex = scan.next();
age = scan.nextInt();
Person p2 = new Person(name,sex,age);
name = scan.next();
sex = scan.next();
age = scan.nextInt();
Person p3 = new Person(name,sex,age);
//p3.print();
System.out.println(Person.getAvgAge());
Person.getAvgAge();
scan.close();
}
}
119 - MyDate类
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int y = scan.nextInt();
int m = scan.nextInt();
int d = scan.nextInt();
MyDate date1 = new MyDate(y, m, d);
y = scan.nextInt();
m = scan.nextInt();
d = scan.nextInt();
MyDate date2 = new MyDate(y, m, d);
date1.print();
System.out.println(date1.compare(date2));
}
}
class MyDate {
private int year;
private int month;
private int day;
public MyDate(int y, int m, int d) {
this.day = d;
this.year = y;
this.month = m;
}
public int compare(MyDate d) {
if (year < d.year)
return -1;
if (year > d.year)
return 1;
if (month < d.month)
return -1;
if (month > d.month)
return 1;
if (day < d.day)
return -1;
if (day > d.day)
return 1;
return 0;
}
public void print() {
System.out.print(month + "/" + day + "/" + year + " ");
}
public int getYear() {
return year;
}
public void setYear(int year) {
this.year = year;
}
public int getMonth() {
return month;
}
public void setMonth(int month) {
this.month = month;
}
public int getDay() {
return day;
}
public void setDay(int day) {
this.day = day;
}
}
190 - 长方形长方体类
class Rectangle {
private double length;
private double width;
public Rectangle(double l, double w) {
this.length = l;
this.width = w;
}
public double getLength() {
return length;
}
public void setLength(double length) {
this.length = length;
}
public double getWidth() {
return width;
}
public void setWidth(double width) {
this.width = width;
}
public double getPerimeter() {
return 2.0 * (width + length);
}
public double getArea() {
return length * width;
}
}
class Cuboid extends Rectangle {
private double height;
public Cuboid(double l, double w, double h) {
super(l, w);
this.height = h;
}
public double getPerimeter() {
return 4.0 * (super.getWidth() + super.getLength() + height);
}
public double getArea() {
return 2 * (super.getLength() * super.getWidth() + height * super.getLength() + height * super.getWidth());
}
public double getVolume()
{
return height * super.getLength() *super.getWidth();
}
}
125 - 学生、大学生、研究生类
class Student {
private int num;
private String name;
private String sex;
public Student(int _num, String _name, String _sex) {
this.name = _name;
this.num = _num;
this.sex = _sex;
}
public int getNum() {
return num;
}
public void setNum(int num) {
this.num = num;
}
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;
}
void print() {
System.out.println("no: " + num);
System.out.println("name: " + name);
System.out.println("sex: " + sex);
}
}
class CollegeStudent extends Student {
private String major;
public CollegeStudent(int _num, String _name, String _sex, String _major) {
super(_num, _name, _sex);
this.major = _major;
}
void print() {
super.print();
System.out.println("major: " + this.major);
}
public String getMajor() {
return this.major;
}
}
class GraduateStudent extends CollegeStudent {
private String supervisor;
public GraduateStudent(int _no, String _name, String _sex, String _major, String _supervisor) {
super(_no, _name, _sex, _major);
this.supervisor = _supervisor;
}
public void print() {
super.print();
System.out.println("supervisor: " + this.supervisor);
}
public void doResearch() {
System.out.println(super.getName() + " is doing research");
}
}
129 - Shape类
abstract class Shape {
public abstract double getPerimeter();
public abstract double getArea();
}
class Square extends Shape {
private double length;
public Square(double l) {
this.length = l;
}
public double getPerimeter() {
return 4.0 * length;
}
public double getArea() {
return length * length;
}
}
class Rectangle extends Shape {
private double length, width;
public Rectangle(double l, double w) {
this.length = l;
this.width = w;
}
public double getPerimeter() {
return 2.0 * (length + width);
}
public double getArea() {
return length * width;
}
}
class Circle extends Shape {
private double r;
public Circle(double rr) {
this.r = rr;
}
public double getPerimeter() {
return 6.2830 * r;
}
public double getArea() {
return 3.14159 * r * r;
}
}
132 - 员工类-2
import java.util.*;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner cin = new Scanner(System.in);
int s = cin.nextInt();
Manager m = new Manager(s);
s = cin.nextInt();
int r = cin.nextInt();
Saleman sal = new Saleman(s, r);
int d = cin.nextInt();
s = cin.nextInt();
Worker w = new Worker(d, s);
System.out.println(m.getSalary());
System.out.println(sal.getSalary());
System.out.println(w.getSalary());
}
}
abstract class Employee {
abstract public int getSalary();
}
class Manager extends Employee {
private int salary;
public Manager(int s) {
salary = s;
}
public int getSalary() {
return salary;
}
}
class Saleman extends Employee {
private int salary;
private int raise;
public Saleman(int s, int r) {
salary = s;
raise = r;
}
public int getSalary() {
return salary + raise;
}
}
class Worker extends Employee {
private int days;
private int salary;
public Worker(int d, int s) {
days = d;
salary = s;
}
public int getSalary() {
return salary * days;
}
}
134 - Shape类-3 && 133 - Shape类-2
abstract class Shape {
public abstract double getPerimeter();
public abstract double getArea();
}
class Square extends Shape {
private double length;
public Square(double l) {
this.length = l;
}
public double getPerimeter() {
return 4.0 * length;
}
public double getArea() {
return length * length;
}
public double getLength() {
return this.length;
}
}
class Rectangle extends Square {
private double width;
public Rectangle(double l, double w) {
super(l);
this.width = w;
}
public double getPerimeter() {
return 2.0 * (super.getLength() + width);
}
public double getArea() {
return super.getLength() * width;
}
}
class Circle extends Shape {
private double r;
public Circle(double rr) {
this.r = rr;
}
public double getPerimeter() {
return 6.2830 * r;
}
public double getArea() {
return 3.14159 * r * r;
}
}
import java.util.*;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner cin = new Scanner(System.in);
int n = cin.nextInt();
String s = cin.next();
if(n == 1)
{
FootballMatch f = new FootballMatch(s);
f.HoldBallMatch();
}
else
{
BasketBallMatch f = new BasketBallMatch(s);
f.HoldBallMatch();
}
}
}
abstract class BallMatch {
public final void HoldBallMatch() {
checkin();
start();
play();
end();
annouceResult();
}
private void checkin() {
System.out.println("now checking in");
}
private void start() {
System.out.println("now starting");
}
private void end() {
System.out.println("now ending");
}
public abstract void play();
public abstract void annouceResult();
}
class FootballMatch extends BallMatch
{
String score;
public FootballMatch(String s)
{
score = s;
}
public void play()
{
System.out.println("now playing football");
}
public void annouceResult()
{
System.out.println("now annoucing result: "+score);
}
}
class BasketBallMatch extends BallMatch
{
String score;
public BasketBallMatch(String s)
{
score = s;
}
public void play()
{
System.out.println("now playing BasketBallMatch");
}
public void annouceResult()
{
System.out.println("now annoucing result: "+score);
}
}
138 - 打球过程
import java.util.*;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner cin = new Scanner(System.in);
int n = cin.nextInt();
String s = cin.next();
if(n == 1)
{
FootballMatch f = new FootballMatch(s);
f.HoldBallMatch();
}
else
{
BasketBallMatch f = new BasketBallMatch(s);
f.HoldBallMatch();
}
}
}
abstract class BallMatch {
public final void HoldBallMatch() {
checkin();
start();
play();
end();
annouceResult();
}
private void checkin() {
System.out.println("now checking in");
}
private void start() {
System.out.println("now starting");
}
private void end() {
System.out.println("now ending");
}
public abstract void play();
public abstract void annouceResult();
}
class FootballMatch extends BallMatch
{
String score;
public FootballMatch(String s)
{
score = s;
}
public void play()
{
System.out.println("now playing football");
}
public void annouceResult()
{
System.out.println("now annoucing result: "+score);
}
}
class BasketBallMatch extends BallMatch
{
String score;
public BasketBallMatch(String s)
{
score = s;
}
public void play()
{
System.out.println("now playing basketball");
}
public void annouceResult()
{
System.out.println("now annoucing result: "+score);
}
}
140 - 家电类
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner cin = new Scanner(System.in);
int n = cin.nextInt();
Appliance[] a = new Appliance[n];
for(int i = 0 ;i <n; i++)
{
int num,h;
num = cin.nextInt();
h = cin.nextInt();
if(num == 1)
{
a[i] = new TV(h);
}
else if(num == 2)
{
a[i] = new WashMachine(h);
}
else
{
a[i] = new AirConditioner(h);
}
}
Truck t = new Truck(a);
System.out.println(t.getSumHeavy());
}
}
interface Appliance {
int getheavy();
}
class TV implements Appliance {
int heavy;
public TV(int h) {
heavy = h;
}
public int getheavy() {
return heavy;
}
}
class WashMachine implements Appliance {
int heavy;
public WashMachine(int h) {
heavy = h;
}
public int getheavy() {
return heavy;
}
}
class AirConditioner implements Appliance {
int heavy;
public AirConditioner(int h) {
heavy = h;
}
public int getheavy() {
return heavy;
}
}
class Truck {
private Appliance t[];
public Truck(Appliance[] x) {
t = x;
}
public int getSumHeavy() {
int sum = 0;
for (int i = 0; i < t.length; i++)
sum += t[i].getheavy();
return sum;
}
}
150 - 教师类
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner cin = new Scanner(System.in);
int no = cin.nextInt();
String name = cin.next();
int age = cin.nextInt();
String s = cin.next();
Teacher t1 = new Teacher(no, name, age, s);
System.out.println(t1.toString());
no = cin.nextInt();
name = cin.next();
age = cin.nextInt();
s = cin.next();
Teacher t2 = new Teacher(no, name, age, s);
System.out.println(t2.toString());
System.out.println(t1.equals(t2));
}
}
class Teacher {
private int no, age;
String name, seminary;
public Teacher(int num, String n, int a, String s) {
no = num;
age = a;
name = n;
seminary = s;
}
public int getNo() {
return no;
}
public void setNo(int no) {
this.no = no;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSeminary() {
return seminary;
}
public void setSeminary(String seminary) {
this.seminary = seminary;
}
public String toString() {
return "no: " + no + ", name:" + name + ", age: " + age + ", seminary: " + seminary;
}
public boolean equals(Teacher t) {
return this.age == t.getAge() && this.no == t.getNo() && this.name.equals(t.getName())
&& this.seminary.equals(t.getSeminary());
}
}
149 - 教师类-2
import java.lang.reflect.Array;
import java.util.*;
import javax.lang.model.type.ArrayType;
public class Main {
public static void main(String[] args) {
Scanner cin = new Scanner(System.in);
int n = cin.nextInt();
Teacher[] t = new Teacher[n];
TeacherManagement tm = new TeacherManagement();
tm.add(t);
for (int i = 0; i < n; i++) {
int no = cin.nextInt();
String name = cin.next();
int age = cin.nextInt();
String s = cin.next();
t[i] = new Teacher(no, name, age, s);
}
Arrays.sort(t);
for (int i = 0; i < t.length; i++) {
System.out.println(t[i].toString());
}
String name = cin.next();
Vector<String> v = tm.search(name);
System.out.println("search by name:");
if(v.isEmpty())
{
System.out.println("no such teacher");
}
else
{
for (int i = 0; i < v.size(); i++)
System.out.println(v.elementAt(i));
}
v.clear();
int age = cin.nextInt();
v = tm.search(age);
System.out.println("search by age:");
if(v.isEmpty())
{
System.out.println("no such teacher");
}
else
{
for (int i = 0; i < v.size(); i++)
System.out.println(v.elementAt(i));
}
v.clear();
cin.close();
}
}
class Teacher implements Comparable<Teacher> {
private int no, age;
String name, seminary;
public Teacher(int num, String n, int a, String s) {
no = num;
age = a;
name = n;
seminary = s;
}
public int compareTo(Teacher t) {
if (this.getNo() > t.getNo())
return 1;
else if (this.getNo() < t.getNo())
return -1;
return 0;
}
public int getNo() {
return no;
}
public void setNo(int no) {
this.no = no;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSeminary() {
return seminary;
}
public void setSeminary(String seminary) {
this.seminary = seminary;
}
public String toString() {
return "no: " + no + ", name: " + name + ", age: " + age + ", seminary: " + seminary;
}
public boolean equals(Teacher t) {
return this.age == t.getAge() && this.no == t.getNo() && this.name.equals(t.getName())
&& this.seminary.equals(t.getSeminary());
}
}
class TeacherManagement {
Teacher[] t;
public TeacherManagement() {
t = null;
}
public void add(Teacher[] s) {
t = s;
}
public Vector<String> search(String name) {
Vector<String> v = new Vector<String>();
for (int i = 0; i < t.length; i++) {
if (t[i].getName().equals(name))
v.addElement(t[i].toString());
}
return v;
}
public Vector<String> search(int age) {
Vector<String> v = new Vector<String>();
for (int i = 0; i < t.length; i++) {
if (t[i].getAge() == age)
v.addElement(t[i].toString());
}
return v;
}
}
142 - 计算机类
import java.lang.reflect.Array;
import java.util.*;
import javax.lang.model.type.ArrayType;
public class Main {
public static void main(String[] args) {
Scanner cin = new Scanner(System.in);
String model1 = cin.next();
double num = cin.nextDouble();
int num1 = cin.nextInt();
String model2 = cin.next();
String model3 = cin.next();
int num3 = cin.nextInt();
String model4 = cin.next();
int num4 = cin.nextInt();
String model5 = cin.next();
int num5 =cin.nextInt();
Computer c1 = new Computer(model1, num ,num1, model2,model3,num3,model4,num4,model5,num5);
model1 = cin.next();
num = cin.nextDouble();
num1 = cin.nextInt();
model2 = cin.next();
model3 = cin.next();
num3 = cin.nextInt();
model4 = cin.next();
num4 = cin.nextInt();
model5 = cin.next();
num5 =cin.nextInt();
Computer c2 = new Computer(model1, num ,num1, model2,model3,num3,model4,num4,model5,num5);
System.out.println(c1.equals(c2));
System.out.println("Computer1:");
c1.print();
System.out.println("Computer2:");
c2.print();
}
}
class Computer {
CPU cpu;
Mainboard mainboard;
Memory memory;
Screen screen;
Harddisk harddisk;
public Computer(String model1, double frequency, int num, String model2, String model3, int num3, String model4,
int num4, String model5, int num5) {
cpu = new CPU(model1, frequency, num);
mainboard = new Mainboard(model2);
memory = new Memory(model3, num3);
screen = new Screen(model4, num4);
harddisk = new Harddisk(model5, num5);
}
public boolean equals(Computer o) {
// IF(!CPU.EQUALS(O.GETCPU()))
// RETURN 1;
// IF(!MAINBOARD.EQUALS(O.GETMAINBOARD()))
// RETURN 2;
// IF(!MEMORY.EQUALS(O.GETMEMORY()))
// RETURN 3;
// IF(!SCREEN.EQUALS(O.GETSCREEN()))
// RETURN 4;
// IF(!HARDDISK.EQUALS(O.GETHARDDISK()))
// RETURN 5;
// RETURN 6;
return cpu.equals(o.getCpu()) && mainboard.equals(o.getMainboard()) && memory.equals(o.getMemory())
&& screen.equals(o.getScreen()) && harddisk.equals(o.getHarddisk());
}
public void print() {
System.out.println("CPU:");
System.out.println(cpu.toString());
System.out.println("Mainboard:");
System.out.println(mainboard.toString());
System.out.println("Memory:");
System.out.println(memory.toString());
System.out.println("Screen:");
System.out.println(screen.toString());
System.out.println("Harddisk:");
System.out.println(harddisk.toString());
}
public CPU getCpu() {
return cpu;
}
public void setCpu(CPU cpu) {
this.cpu = cpu;
}
public Mainboard getMainboard() {
return mainboard;
}
public void setMainboard(Mainboard mainboard) {
this.mainboard = mainboard;
}
public Memory getMemory() {
return memory;
}
public void setMemory(Memory memory) {
this.memory = memory;
}
public Screen getScreen() {
return screen;
}
public void setScreen(Screen screen) {
this.screen = screen;
}
public Harddisk getHarddisk() {
return harddisk;
}
public void setHarddisk(Harddisk harddisk) {
this.harddisk = harddisk;
}
}
class CPU {
private String model;
private double basicFrequency;
private int Kernelnumber;
public CPU(String s, double b, int k) {
model = s;
basicFrequency = b;
Kernelnumber = k;
}
public boolean equals(CPU o) {
return model.equals(o.getModel()) && basicFrequency == o.getBasicFrequency()
&& Kernelnumber == o.getKernelnumber();
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public double getBasicFrequency() {
return basicFrequency;
}
public void setBasicFrequency(double basicFrequency) {
this.basicFrequency = basicFrequency;
}
public int getKernelnumber() {
return Kernelnumber;
}
public void setKernelnumber(int kernelnumber) {
Kernelnumber = kernelnumber;
}
public String toString() {
return "Model: " + model + "\nFrequency: " + basicFrequency + "\nNumber of Cores: " + Kernelnumber;
}
}
class Mainboard {
private String model;
public Mainboard(String s) {
model = s;
}
public String toString() {
return "Model: " + model;
}
public boolean equals(Mainboard o) {
return model.equals(o.getModel());
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
}
class Memory {
private String model;
private int vol;
public Memory(String m, int v) {
model = m;
vol = v;
}
public boolean equals(Memory o) {
return vol == o.getVol() && model.equals(o.getModel());
}
public String toString() {
return "Model: " + model + "\nSize: " + vol;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public int getVol() {
return vol;
}
public void setVol(int vol) {
this.vol = vol;
}
}
class Screen {
private String model;
private int Size;
public Screen(String m, int s) {
model = m;
Size = s;
}
public boolean equals(Screen o) {
return Size == o.getSize() && model.equals(o.getModel());
}
public String toString() {
return "Model: " + model + "\nSize: " + Size;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public int getSize() {
return Size;
}
public void setSize(int size) {
Size = size;
}
}
class Harddisk {
private String model;
private int Size;
public Harddisk(String m, int s) {
model = m;
Size = s;
}
public boolean equals(Harddisk o) {
return Size == o.getSize() && model.equals(o.getModel());
}
public String toString() {
return "Model: " + model + "\nSize: " + Size;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public int getSize() {
return Size;
}
public void setSize(int size) {
Size = size;
}
}
139 - 整数数组比较
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner cin = new Scanner(System.in);
int n = cin.nextInt();
int[] a = new int[n];
for (int i = 0; i < n; i++)
a[i] = cin.nextInt();
int[] b = a.clone();
Arrays.sort(b);
int num1 = 0;
int num2 = 0;
int num3 = 0;
for (int i = 0; i < n; i++) {
if (a[i] > b[i])
num1++;
else if (a[i] == b[i])
num2++;
else
num3++;
}
System.out.println(num1);
System.out.println(num2);
System.out.println(num3);
cin.close();
}
}
151 - 矩阵类
153 - 判断回文
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner cin = new Scanner(System.in);
int num = cin.nextInt();
Integer n = num;
String s = n.toString();
System.out.println(s.length());
boolean flag = true;
for (int i = 0; i < s.length() / 2; i++) {
if (s.charAt(i) != s.charAt(s.length() - i - 1)) {
flag = false;
break;
}
}
if (flag == true)
System.out.println("Y");
else
System.out.println("N");
}
}
