java--面向对象1-18例题

向右看齐 2022-06-04 09:52 287阅读 0赞

**1.**

package Lei;

public class Cal \{  
public boolean getEvenNum(int x)\{  
boolean isOk=false;  
if(x%2==0)\{  
isOk=true;  
\}  
return isOk;  
/\*if(x%2==0)\{  
return true;  
\}else\{  
return false;  
\}\*/  
\}

**2.**

package Lei;  
  
  
public class Calculate \{  
int sum(int n) \{  
int sum=0;  
for (int i = 0; i <=n; i++) \{  
sum=sum+i;  
\}  
return sum;  
\}  
\}

**3.**

package Lei;  
  
  
public class Compare \{  
/\*int getMax(int x,int y)\{  
if(x>y)\{  
return x;  
\}else if(x<y)\{  
return y;  
\}else\{  
return x=y;  
\}  
\}\*/  
int getMax(int x,int y)\{  
int res=(x>y)?x:y;  
return res;  
\}  
\}

**4.**

package Lei;  
  
  
public class Dog \{  
private String name;  
private String furColor;  
private String type;  
public String getName() \{  
return name;  
\}  
public void setName(String name) \{  
this.name = name;  
\}  
public String getFurColor() \{  
return furColor;  
\}  
public void setFurColor(String furColor) \{  
this.furColor = furColor;  
\}  
public String getType() \{  
return type;  
\}  
public void setType(String type) \{  
this.type = type;  
\}  
  
\}

**5.**

package Lei;  
  
  
public class Goods \{  
private String id;  
private int price;  
private String brand;  
public Goods(String id, int price, String brand) \{  
this.id = id;  
this.price = price;  
this.brand = brand;  
\}  
public void display()\{  
System.out.println("商品编号："+this.id+" 商品名称："+this.brand+" 商品价格："+this.price);  
\}  
  
  
\}

**6.**

package Lei;  
  
  
public class ArrayUtils \{  
int getMax(int\[\] arr)\{  
int max=arr\[0\];  
for(int i=0;i<arr.length;i++)\{  
if(max<arr\[i\])\{  
max=arr\[i\];  
\}  
\}  
return max;  
\}  
int\[\] sort(int\[\] arr)\{  
for(int i=0;i<arr.length;i++)\{  
for(int j=0;j<arr.length-1-i;j++)\{  
if(arr\[j\]>arr\[j+1\])\{  
int temp=arr\[j\];  
arr\[j\]=arr\[j+1\];  
arr\[j+1\]=temp;  
\}  
\}  
\}  
return arr;  
\}  
  
\}

**7.**

package Lei;  
  
  
public class kdy \{  
private String name;  
private String id;  
private int salary;  
public kdy(String name, String id, int salary) \{  
this.name = name;  
this.id = id;  
this.salary = salary;  
\}  
public void display()\{  
System.out.println("姓名："+this.name+"员工编号："+this.id+"员工工资："+this.salary);  
\}  
  
\}

**8.**

package Lei;  
  
  
public class Math \{  
/\*void printIdea()\{  
for(int i=1;i<=9;i++)\{  
for(int j=i;j<=9;j++)\{  
System.out.print(i+"\*"+j+"="+i\*j+"\\t");  
\}  
System.out.println();  
\}  
\}\*/  
/\*void printIdea()\{  
for(int i=1;i<=9;i++)\{  
for(int k=1;k<=9-i;k++)\{  
System.out.print("\\t");  
\}  
for(int j=1;j<i+1;j++)\{  
System.out.print(i+"\*"+j+"="+i\*j+"\\t");  
\}  
System.out.println();  
\}  
\}\*/  
  
/\*void printIdea()\{  
for(int i=1;i<=9;i++)\{  
for(int j=1;j<=i;j++)\{  
System.out.print(i+"\*"+j+"="+i\*j+"\\t");  
\}  
System.out.println();  
\}  
\}\*/  
void printIdea()\{  
for(int i=1;i<=9;i++)\{  
for(int k=1;k<i;k++)\{  
System.out.print("\\t");  
\}  
for(int j=1;j<=10-i;j++)\{  
System.out.print(i+"\*"+j+"="+i\*j+"\\t");  
\}  
System.out.println();  
\}  
\}  
\}

**9.**

package Lei;  
  
  
public class Number \{  
private int n1;  
private int n2;  
public Number(int n1, int n2) \{  
this.n1 = n1;  
this.n2 = n2;  
\}  
public void addition()\{  
int sum=n1+n2;  
System.out.println("两个数相加的结果是："+sum);  
\}  
public void subtration()\{  
int sum=n1-n2;  
System.out.println("两个数相减的结果是："+sum);  
\}  
public void multiplication()\{  
int sum=n1\*n2;  
System.out.println("两个数相乘的结果是："+sum);  
\}  
public void division()\{  
if(n2==0)\{  
System.out.println("除数不能是0");  
\}else\{  
int sum=n1/n2;  
System.out.println("两个数相除的结果是："+sum);  
\}  
\}  
\}

**10.**

package Lei;  
  
  
public class Number11 \{  
private int num1;  
private int num2;  
  
private double a;  
private double b;  
private double c;  
  
private String str1;  
private String str2;  
public Number11(int num1, int num2) \{  
if(num1>num2)\{  
System.out.println(num1);  
\}else\{  
System.out.println(num2);  
\}  
\}  
public Number11(double a, double b, double c) \{  
System.out.println(a\*b\*c);  
\}  
public Number11(String str1, String str2) \{  
if(str1.equals(str2))\{  
System.out.println("相等");  
\}else\{  
System.out.println("不相等 ");  
\}  
\}  
  
  
  
  
  
/\*public Number11(int num1, int num2) \{  
this.num1 = num1;  
this.num2 = num2;  
\}  
  
  
public Number11(double a, double b, double c) \{  
this.a = a;  
this.b = b;  
this.c = c;  
\}  
  
  
  
public Number11(String str1, String str2) \{  
this.str1 = str1;  
this.str2 = str2;  
\}  
  
  
public void show1()\{  
if(num1>num2)\{  
System.out.println("最大值："+this.num1);  
\}else\{  
System.out.println("最大值："+this.num2);  
\}  
\}  
public void show2()\{  
System.out.println("三个数的乘积为："+this.a\*this.b\*this.c);  
\}  
public void show3()\{  
if(str1.equals(str2))\{  
System.out.println("相同的字符串");  
\}else\{  
System.out.println("不是相同的字符串！");  
\}  
\}\*/  
  
  
\}

**11.**

package Lei;  
  
  
public class Person9 \{  
private String name;  
private int age;  
  
  
public Person9(String name, int age) \{  
this.name = name;  
this.age = age;  
\}  
  
  
public void display()\{  
System.out.println("姓名："+this.name+" 年龄："+this.age);  
\}  
\}

**12.**

package Lei;  
  
  
public class User \{  
private String name;  
private String age;  
private String Email;  
private String telephone;  
public User(String name,String age,String Email,String telephone)\{  
this.name=name;  
this.age=age;  
this.Email=Email;  
this.telephone=telephone;  
\}  
public void show()\{  
System.out.println("名字："+this.name+" 年龄："+this.age+" 电子邮件："+this.Email+" 电话："+this.telephone);  
\}  
\}

**13.**

package Lei;  
  
  
public class User10 \{  
private String id;  
private String password;  
private String email;  
public User10(String id, String password, String email) \{  
this.id = id;  
this.password = password;  
if(email==null)\{  
this.email=id+"@gameschool.com";  
\}else\{  
this.email = email;  
\}  
  
\}  
public void info()\{  
System.out.println("用户ID："+this.id+" 用户密码："+this.password+" 电子邮箱："+this.email);  
\}  
  
\}

**14.**

package Lei;  
  
  
public class Year \{  
boolean valid(int year)\{  
if((year%4==0&&year%100!=0)||(year%400==0))\{  
return true;  
\}else\{  
return false;  
\}  
\}  
\}

**15.Store**

package Lei;  
  
  
public class Store \{  
public double money;  
  
public Store(double money) \{  
this.money = money;  
\}  
double totle=0.0;  
public double cq(double money)\{  
if(money%10==0||money%5==0)\{  
totle=totle+money;  
return totle;  
\}else\{  
System.out.println("不是5或10的倍数，存钱失败！！！");  
return totle;  
//System.out.println(totle);  
\}  
\}  
public double quqian(double money2) \{  
if((money2%2==0.0)&&(totle-money2>0.0))\{  
totle=totle-money2;  
return totle;  
\}else\{  
System.out.println("输入有误！！！，请重新输入");  
return totle;  
\}  
  
\}  
  
\}

**16.**

package Lei;  
  
  
public class Phone \{  
private String brand;  
private double price;  
private String color;  
  
  
  
  
  
public Phone(String brand, double price, String color) \{  
this.brand = brand;  
this.price = price;  
this.color = color;  
\}  
public String getBrand() \{  
return brand;  
\}  
public void display()\{  
System.out.println(this.brand+"品牌手机,价格："+this.price+",颜色："+this.color);  
\}  
  
  
public String songName()\{  
return "好汉歌";  
\}  
\}

**17.**

package Lei;  
  
  
public class Person \{  
private String name;  
private String height;  
private String weapon;  
private String race;  
  
  
public Person(String name, String height, String weapon, String race) \{  
this.name = name;  
this.height = height;  
this.weapon = weapon;  
this.race = race;  
\}  
  
public String getName() \{  
return name;  
\}  
  
  
public String getHeight() \{  
return height;  
\}  
  
  
public String getWeapon() \{  
return weapon;  
\}  
  
  
public String getRace() \{  
return race;  
\}  
  
  
  
\}

**18.**

package Lei;  
  
  
public class Num \{  
public static int num=0;  
public static void showMe()\{  
System.out.println("呵呵呵");  
\}  
\}

Test: