一、语法练习

练习题一.png

代码实现：

Circle类：
public class Circle
{
    final double Pi=3.14;
    double r;//圆的半径

    public Circle(){}

    public Circle(double r)
    {
        this.r = r;
    }

    public double getR()
    {
        return r;
    }

    public void setR(double r)
    {
        this.r = r;
    }

    //计算圆的周长
    public void showArea(double r){
        double S=Pi*r*r;
        System.out.println("圆的面积是："+S);
    }
    //计算圆的面积
    public void showPerimeter(double r){
        double C=2*Pi*r;
        System.out.println("圆的周长是："+C);
    }
}

TestCircle类：

public class TestCircle
{
    public static void main(String[] args)
    {
        Circle circle=new Circle();
        circle.showArea(2.5);
        circle.showPerimeter(4);
    }
}

运行截图:

image.png

二、语法练习

image.png

代码实现：

MyDate类：

public class MyDate
{
    int year;
    int month;
    int day;

    public MyDate(){}

    public MyDate(int year, int month, int day)
    {
        this.year = year;
        this.month = month;
        this.day = day;
    }

    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;
    }

    //打印日期方法
    public void  showDate(int year,int month,int day){
            System.out.println("日期是："+year+"年"+month+"月"+day+"日");
    }

    //判断年饭是否为闰年方法
    public void  isBi(int year){
        if (year%4==0&&year%100!=0) {
            System.out.println(year+"是闰年");
        }else if (year%400==0&&year%100==0){
            System.out.println(year+"是闰年");
        }else {
            System.out.println(year+"不是闰年");
        }
    }

}

TestMyDate类：

public class TestMyDate
{
    public static void main(String[] args)
    {
        MyDate myDate= new MyDate();
        myDate.showDate(1900,1,1);
        myDate.isBi(1900);
    }
}

运行截图:

image.png

三、语法练习

image.png

代码实现：

Card类：

public class Card{
{
    String point;
    String suit;

    public Card(){}

    public Card(String point, String suit)
    {
        this.point = point;
        this.suit = suit;
    }

    public String getPoint()
    {
        return point;
    }

    public void setPoint(String point)
    {
        this.point = point;
    }

    public String getSuit()
    {
        return suit;
    }

    public void setSuit(String suit)
    {
        this.suit = suit;
    }

    //打印牌面信息
    public void showCard( String suit,String point){
        System.out.println(suit+""+point);
    }

}

TestCard类：

public class TestCard
{
    public static void main(String[] args)
    {
        Card card= new Card();
        System.out.print("牌面信息是：");
        card.showCard("黑桃","A");
    }
}

运行截图:

image.png

四、语法练习

image.png

代码实现：

Manager类：

public class Manager
{
    String ManagerName;//管理人员姓名
    String ManagerNumber;//管理人员工号
    int ManagerSalary;//管理人员薪资
    double BasePay;//基本工资
    double award;//奖金

    public Manager(){}

    public Manager(String managerName, String managerNumber, int managerSalary)
    {
        ManagerName = managerName;
        ManagerNumber = managerNumber;
        ManagerSalary= managerSalary;
    }

    public String getManagerName()
    {
        return ManagerName;
    }

    public void setManagerName(String managerName)
    {
        ManagerName = managerName;
    }

    public String getManagerNumber()
    {
        return ManagerNumber;
    }

    public void setManagerNumber(String managerNumber)
    {
        ManagerNumber = managerNumber;
    }

    public int getManagerSalary()
    {
        return ManagerSalary;
    }

    public void setManagerSalary(int managerSalary)
    {
        ManagerSalary = managerSalary;
    }

    public double getBasePay()
    {
        return BasePay;
    }

    public void setBasePay(double basePay)
    {
        BasePay = basePay;
    }

    public double getAward()
    {
        return award;
    }

    public void setAward(double award)
    {
        this.award = award;
    }

    //打印姓名，工号信息
    public void intro(String managerName,String managerNumber){
            System.out.println("经理姓名："+managerName+"\n"+"工号："+managerNumber);
    }
    //打印薪资信息
    public void showSalary( double BasePay,double award){
         ManagerSalary=(int)(BasePay+award);
        System.out.println("基本工资为："+BasePay+"奖金为："+award);

    }
    //打印工作信息
    public void work(){
            System.out.println("正在努力的做着管理工作，分配任务，检查员工提交上来的代码.....");
    }
}

Coder类：

public class Coder
{
    String CoderName;//员工姓名
    String CoderNumber;//员工工号
    int CoderBasePay;//员工基本工资

    public Coder(){}

    public Coder(String coderName, String coderNumber, int coderBasePay)
    {
        CoderName = coderName;
        CoderNumber = coderNumber;
        CoderBasePay = coderBasePay;
    }

    public String getCoderName()
    {
        return CoderName;
    }

    public void setCoderName(String coderName)
    {
        CoderName = coderName;
    }

    public String getCoderNumber()
    {
        return CoderNumber;
    }

    public void setCoderNumber(String coderNumber)
    {
        CoderNumber = coderNumber;
    }

    public int getCoderBasePay()
    {
        return CoderBasePay;
    }

    public void setCoderBasePay(int coderBasePay)
    {
        CoderBasePay = coderBasePay;
    }

    //打印姓名，工号信息
    public void intro(String CoderName,String CoderNumber){
        System.out.println("员工姓名："+CoderName+"\n"+"工号："+CoderNumber);
    }
    //打印薪资信息
    public void showSalary(int CoderBasePay ){

        System.out.println("基本工资为："+CoderBasePay+"奖金为：无");

    }
    //打印工作信息
    public void work(){
        System.out.println("正在努力的写的代码.....");
    }
}

Test类：

public class Test
{
    public static void main(String[] args)
    {
        Manager manager = new Manager();
        manager.intro("James","9527");
        manager.showSalary(15000,3000);
        manager.work();
        System.out.println("=========");

        Coder coder = new Coder();
        coder.intro("Kode","0025");
        coder.showSalary(10000);
        coder.work();
    }
}

运行截图:

image.png

五、语法练习

image.png

代码实现：

Teacher类：

public class Teacher
{
    String TeacherName;//教师姓名
    int TeacherAge;//教师年龄
    String content;//讲课内容

    public Teacher(){}
  
    public Teacher(String teacherName, int TeacherAge, String content)
    {
        TeacherName = teacherName;
        this.TeacherAge = TeacherAge;
        this.content = content;
    }

    public String getTeacherName()
    {
        return TeacherName;
    }

    public void setTeacherName(String teacherName)
    {
        TeacherName = teacherName;
    }

    public int TeacherAge()
    {
        return TeacherAge;
    }

    public void setTeacherAge(int TeacherAge)
    {
        this.TeacherAge = TeacherAge;
    }

    public String getContent()
    {
        return content;
    }

    public void setContent(String content)
    {
        this.content = content;
    }

    //吃饭方法
    public void eat(int TeacherAge,String TeacherName){
            System.out.println("年龄为"+TeacherAge+"的"+TeacherName+"正在吃饭....");
    }
    //讲课方法
    public void teach(int TeacherAge,String TeacherName,String content){
        System.out.println("年龄为"+TeacherAge+"的"+TeacherName+"正在亢奋的讲着"+content+"的知识");
    }
}

Student类：

public class Student
{
    String StudentName;//学生姓名
    int StudentAge;//学生年龄
    String content;//学习内容

    public Student(){}

    public Student(String studentName, int studentAge, String content)
    {
        StudentName = studentName;
        StudentAge = studentAge;
        this.content = content;
    }

    public String getStudentName()
    {
        return StudentName;
    }

    public void setStudentName(String studentName)
    {
        StudentName = studentName;
    }

    public int getStudentAge()
    {
        return StudentAge;
    }

    public void setStudentAge(int studentAge)
    {
        StudentAge = studentAge;
    }

    public String getContent()
    {
        return content;

Test1类：

public class Test1
{
    public static void main(String[] args)
    {
        Teacher teacher= new Teacher();
        teacher.eat(30,"周老师");
        teacher.teach(30,"周老师","java");

        Student student = new Student();
        student.eat(18,"韩同学");
        student.study(18,"韩同学","java");
    }
}

运行截图:

image.png