在哪查找网站的建设者,国际设计师网站,顺义网站建设哪家好,互联网运营培训课程1.#xff08;面向对象基础#xff09;写一个Worker 类#xff0c;并创建多个Worker 对象。
为Worker 类添加四个属性#xff0c; 1int 类型的id#xff0c;表示工人的编号#xff1b; 2String 类型的name#xff0c;表示工人的姓名#xff1b; 3…1.面向对象基础写一个Worker 类并创建多个Worker 对象。
为Worker 类添加四个属性 1int 类型的id表示工人的编号 2String 类型的name表示工人的姓名 3int 类型的age表示工人的年龄 4double 类型的salary表示工人的工资。为Worker 类添加两个构造方法 1公开无参构造方法 2接受四个参数的构造方法四个参数分别为int、字符串、int 和double类型。为Worker 类添加两个work 方法一个无参打印工人姓名工作8小时 另一个带整数参数打印工人姓名以及工作的时间为多少小时。
package com.fxm.test;
public class Test1{public static void main(String[] args){Worker w new Worker(10086,xiaobai,18,1800);w.work();w.work(6);}
}
class Worker{int id;String name;int age;double salary;public Worker(){}public Worker(int id,String name,int age,double salary){this.id id;this.name name;this.age age;this.salary salary;}public void work(){System.out.println(name 工作8小时);}public void work(int hours){System.out.println(name 工作 hours 小时);}
}2 ** 、完成如下代码
public class WorkerArrayTest{ public static void main(String[] args){ //1 、创建一个元素为Worker类型的数组长度为 3 //2 、创建 3 个Worker对象并保存到数组中 //3 、遍历数组并调用每一个Worker对象的无参work方法 //4 、调用oldWorker函数 } //写一个函数oldWorker遍历数组返回其中年纪最大的Worker对象 / / 形参为Worker[]类型 返回值为Worker类型 }
package com.fxm.test;
public class Test2{public static void main(String[] args){Worker[] ws new Worker[3];ws[0] new Worker(xiaobai,18);ws[1] new Worker(xiaohei,20);ws[2] new Worker(xiaohong,19);for(int i 0; i ws.length; i){ws[i].work();}Worker max oldWorker(ws);System.out.println(max.name--max.age);}public static Worker oldWorker(Worker[] ws){Worker max ws[0];for(int i 0; i ws.length; i){if(max.age ws[i].age){max ws[i];} }return max;}
}
class Worker{String name;int age;public void work(){}public Worker(String name,int age){this.name name;this.age age;}
}3 *** 、定义一个Company类该类中有一个Worker[]类型属性保存多个Worker对 象。完成如下代码 public class Company{ Worker[] ws new Worker[16]; int count 0; / / 记录ws中有效的元素个数 //完成添加Worker方法 public void addWorker(Worker w){ //如果ws已满扩容 //添加 w //将count递增 1 } //完成方法 返回每月公司需要支付的薪资 public double getAllSalaries(){ / / 遍历数组并计算总额 } //完成方法 判断一个给定的 W o r k e r 对象是否属于当前公司通过 i d 判断 public boolean contains(Worker w){ //遍历数组进行判断 } }
package com.fxm.test;
public class Test3{public static void main(String[] args){Company c new Company();//添加员工Worker w1 new Worker(1,zhang3,18,18000.0);Worker w2 new Worker(2,li4,20,20000.0);Worker w3 new Worker(3,wang5,16,16000.0);c.addWorker(w1);c.addWorker(w2);double sum c.getAllSalaries();System.out.println(sum);System.out.println(c.contains(w1));System.out.println(c.contains(w3));}
}
class Company{Worker[] ws new Worker[16];int count 0;public void addWorker(Worker w){if(count ws.length){ws java.util.Arrays.copyOf(ws,ws.length 1);}ws[count] w;count;}public double getAllSalaries(){double sum 0.0;for(int i 0; i count; i){sum ws[i].salary;}return sum;}public boolean contains(Worker w){for(int i 0; i count; i){if(ws[i].id w.id){return true;}}return false;}
}4.封装已知一个类Student 代码如下
class Student{String name;int age;String address;String zipCode;String mobile; }把Student 的属性都作为私有并提供get/set 方法以及适当的构造方法。为Student 类添加一个getPostAddress 方法要求返回Student 对象的 地址和邮编。
package com.fxm.test;
public class Test4{public static void main(String[] args){Student s new Student();s.setName(xiaobai);s.setAddress(nanyang);s.setZipCode(474250);s.study(6);System.out.println(s.getPostAddress());}
}
class Student{private String name;private int age;private String address;private String zipCode;private String mobile;public String getName(){return name;}public void setName(String newName){name newName;}public int getAge(){return age;}public void setAge(int newAge){age newAge;}public String getAddress(){return address;}public void setAddress(String newAddress){address newAddress;}public String getZipCode(){return zipCode;}public void setZipCode(String newZipCode){zipCode newZipCode;}public String getMobile(){return mobile;}public void setMobile(String newMobile){mobile newMobile;}public void study(int hours){System.out.println(nameѧϰhoursСʱ);}public String getPostAddress(){return addresszipCode;}
}5、 *** .使用day07的Teacher类和Student类 类 Clazz //该类对象表示一个班级 属性 Teacher t Student[] ss new Student[10];//保存多个Student对象 int count;//表示有效元素个数 方法 addStudent(Student s);//添加Student对象 removeStudent(int id);//根据id移除Student对象 updateStudent(Student s);//更新Student对象 queryStudent(int id);//根据id查询Student对象
package com.fxm.test;
public class Test5{public static void main(String[] args){Clazz c new Clazz();Student s1 new Student(1,xiao1hei,16,男);Student s2 new Student(2,xiao2hei,16,男);Student s3 new Student(3,xiao3hei,16,男);Student s4 new Student(4,xiao4hei,16,男);c.addStudent(s1);c.addStudent(s2);c.addStudent(s3);c.addStudent(s4);s4.age 18;c.updateStudent(s4);Student s c.queryStudent(4);System.out.println(s.name--s.age);c.removeStudent(4);System.out.println(c.queryStudent(4));}
}
class Student{int id;String name;int age;char sex;public Student(int id,String name,int age,char sex){this.id id;this.name name;this.age age;this.sex sex;}public void study(){System.out.println(name学习8小时); }public void study(int hours){System.out.println(name学习hours小时);}
}class Teacher{int id;String name;String course;public void teach(){System.out.println(name教course);}
}class Clazz{Student[] ss new Student[10];Teacher t;int count;public void addStudent(Student s){if(ss.length count){ss java.util.Arrays.copyOf(ss,ss.length 1);}ss[count] s;count;}public void removeStudent(int id){int index -1;for(int i 0; i count; i){if(ss[i].id id){index i;break;}}if(index -1){return;}System.arraycopy(ss,index1,ss,index,count-index-1);count--;}public boolean updateStudent(Student s){for(int i 0; i count; i){if(ss[i].id s.id){ss[i] s;return true;}}return false;}public Student queryStudent(int id){for(int i 0; i count; i){if(ss[i].id id){return ss[i];}}return null;}
}6、按类图要求写出所有的类 Instrument表示乐器类play方法打印输出”弹奏乐器” Wind继承Instrument重写play方法打印输出”弹奏Wind” 并提供另外一个playWind方法打印输出”调用wind的play2方法” Brass继承Instrument重写play方法打印输出”弹奏Brass” 并提供另外一个playBrass方法打印输出”调用Brass的play2方法”
package com.fxm.test;
public class Test6{public static void main(String args[]){Wind w new Wind();w.play();w.playWind();Brass b new Brass();b.play();b.playBrass();}
}
class Instrument{public void play(){System.out.println( 弹奏乐器);}
}
class Wind extends Instrument{public void play(){System.out.println( 弹奏Wind);}public void playWind(){System.out.println( 调用Wind的play2方法);}
}
class Brass extends Instrument{public void play(){System.out.println( 弹奏Brass);}public void playBrass(){System.out.println( 调用Brass的play2方法);}
}
7.封装、继承有以下几个类根据下面的继承关系用 Java 代码实现。 a) Circle 类圆形 属性半径方法求周长、求面积 b) Rect 类矩形 属性长、宽方法求周长、求面积 c) Square 类正方形 属性边长方法求周长、求面积 提示 1 三个子类各自有其属性圆radius半径 矩形length长 width宽 正方形 length边长; 2 父类中的周长(girth)和面积(area)的方法统一返回0.0在三个子类中重写两个方法 圆 周长公式3.142r 面积公式3.14rr 矩形 周长公式(lengthwidth)2 面积公式 lengthwidth 正方形周长公式 length4 面积公式 lengthlength
package com.fxm.test;
public class Test7{public static void main(String args[]){Circle c new Circle();c.area();c.girth();}
}
class Shape{public double area(){ return 0.0;}public double girth(){return 0.0;}
}
class Circle extends Shape{double radius;public Circle(){}public Circle(double radius){this.radius radius;}public void setRadius(double radius){this.radius radius;}public double getRadius(){return radius;}public double area(){return (3.14*radius*radius);}public double girth(){return (6.28*radius);}
}
class Rect extends Shape{private double length;private double width;public void Rect(){}public void Rect(double length,double width){this.length length;this.width width;}public void setLength(double length){this.length length;}public void setWidth(double width){this.width width;}public double getLength(){return length;}public double getWidth(){return width;}public double area(){return (length*width);}public double girth(){return ((lengthwidth)*2);}
}
class Square extends Shape{private double length;public void setLength(double length){this.length length;}public double getLength(){return length;}public double area(){return (length*length);}public double girth(){return (length*4);}
}8.封装、继承、super某公司的雇员分为以下若干类
Employee这是所有员工总的父类属性员工的姓名,员工的生日月份。方法getSalary(intmonth) 根据参数月份来确定工资如果该月员工过生日则公司会额外奖励100 元。
SalariedEmployeeEmployee 的子类拿固定工资的员工。属性月薪
HourlyEmployee Employee 的子类 按小时拿工资的员工 每月工作超出160 小时的部分按照1.5 倍工资发放。属性每小时的工资、每月工作的小时数
SalesEmployeeEmployee 的子类销售人员工资由月销售额和提成率决定。 属性月销售额、提成率
BasePlusSalesEmployeeSalesEmployee 的子类有固定底薪的销售人员工资 由底薪加上销售提成部分。属性底薪。
根据要求创建 SalariedEmployee 、 HourlyEmployees 、SaleEmployee 和 BasePlusSalesEmployee四个类的对象各一个并计算某个月这四个对象的工资。 注意要求把每个类都做成完全封装不允许非私有化属性。
package com.fxm.test;public class Employee {public Employee(String name, int month){this.name name;this.month month;}public float get_Salary(int month){//如果月份为员工生日月份则增加100if(month this.month){return 100;}else{return 0;}}private String name;private int month;public static void main(String[] args) {Employee a[] new Employee[4];a[0] new SalariedEmployee(A, 2, 1000);a[1] new HourlyEmployee(B, 3, 2000, 200);a[2] new SalesEmployee(C, 4, 50000, (float) 0.1);a[3] new BasedPlusSalesEmployee(D, 5, 50000, (float) 0.1, 1000);System.out.println(A的工资为 a[0].get_Salary(2));System.out.println(B的工资为 a[1].get_Salary(2));System.out.println(C的工资为 a[2].get_Salary(2));System.out.println(D的工资为 a[3].get_Salary(2));}
}class SalariedEmployee extends Employee{public SalariedEmployee(String name, int month, float salary){super(name, month);this.salary salary; }Overridepublic float get_Salary(int month){return salary super.get_Salary(month); }private float salary;
}
class HourlyEmployee extends Employee
{public HourlyEmployee(String name, int month, float salary, int hour){super(name, month);this.salary salary;this.hour hour;}Overridepublic float get_Salary(int month){//大于160小时的情况if (hour 160){return (float) (salary * 160 (hour - 160) * salary * 1.5 super.get_Salary(month));}else{return salary * hour super.get_Salary(month);}}private float salary; //每小时工资private int hour; //每月工作的小时数
}//销售人员
class SalesEmployee extends Employee
{public SalesEmployee(String name, int month, float sale, float bonus){super(name, month);this.sale sale;this.bonus bonus;}Overridepublic float get_Salary(int month){return sale * bonus super.get_Salary(month);}private float sale; //销售额private float bonus; //提成率
}//有固定底薪的销售人员
class BasedPlusSalesEmployee extends SalesEmployee
{public BasedPlusSalesEmployee(String name, int month, float sale,float bonus, float baseSalary){super(name, month, sale, bonus);this.baseSalary baseSalary;}Overridepublic float get_Salary(int month){return baseSalary super.get_Salary(month);}private float baseSalary; //底薪
}
