上传了实验四,已确认无敏感信息

实验4/.vscode/settings.json

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+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}

实验4/README.md

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+## Getting Started
+
+Welcome to the VS Code Java world. Here is a guideline to help you get started to write Java code in Visual Studio Code.
+
+## Folder Structure
+
+The workspace contains two folders by default, where:
+
+- `src`: the folder to maintain sources
+- `lib`: the folder to maintain dependencies
+
+Meanwhile, the compiled output files will be generated in the `bin` folder by default.
+
+> If you want to customize the folder structure, open `.vscode/settings.json` and update the related settings there.
+
+## Dependency Management
+
+The `JAVA PROJECTS` view allows you to manage your dependencies. More details can be found [here](https://github.com/microsoft/vscode-java-dependency#manage-dependencies).

实验4/src/Task1/Animal.java

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+//Animal.java
+package Task1;
+
+public class Animal {
+    String name;
+
+    public Animal() {
+        System.out.println("super");
+    }
+
+    public void shout() {
+        System.out.println(String.format("%s发出叫声", this.name));
+    }
+}

实验4/src/Task1/Dog.java

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+//Dog.java
+package Task1;
+
+public class Dog extends Animal {
+    public Dog() {
+        super();
+    }
+
+    public void shout() {
+        System.out.println(String.format("%s发出汪汪叫", this.name));
+    }
+
+    public void superShout() {
+        super.shout();
+    }
+}

实验4/src/Task1/Test.java

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+//Test.java
+package Task1;
+
+public class Test {
+    public static void main(String[] args) {
+        Dog lucky = new Dog();
+        lucky.name = "lucky";
+        lucky.shout();
+        lucky.superShout();
+    }
+}

实验4/src/Task2/Person.java

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+//Person.java
+package Task2;
+
+public abstract class Person {
+    String name;
+    int age;
+
+    public Person() {
+        System.out.println("super");
+    }
+
+    public abstract void sayHello();
+}

实验4/src/Task2/Student.java

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+//Student.java
+package Task2;
+
+public class Student extends Person {
+    public Student() {
+        super();
+    }
+
+    public void sayHello() {
+        System.out.println(String.format("大家好，我叫%s，今年%d岁，很高兴认识大家", this.name, this.age));
+    }
+
+    public static void main(String[] args) {
+        Student s1 = new Student();
+        s1.name = "Jack";
+        s1.age = 18;
+        s1.sayHello();
+    }
+}

实验4/src/Task4/Rectangle.java

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+//Rectangle.java
+package Task4;
+
+public class Rectangle {
+    public interface AreaRectangle {
+
+    }
+
+    private double x;
+    private double y;
+
+    public Rectangle(double x, double y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    public double area() {
+        return x * y;
+    }
+
+    public String toString() {
+        return "该长方形面积为" + this.area();
+    }
+}

实验4/src/Task4/TestArea.java

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+//TestArea.java
+package Task4;
+
+public class TestArea {
+    public static void main(String[] args) {
+        Rectangle r1 = new Rectangle(10.0, 20.0);
+        System.out.println(r1.toString());
+    }
+}

实验4/src/Task5/Person.java

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+//Person.java
+package Task5;
+
+public abstract class Person {
+    String name;
+    String gender;
+    String birthday;
+
+    public abstract void printInfo();
+}

实验4/src/Task5/Student.java

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+//Student.java
+package Task5;
+
+public class Student extends Person {
+    String school;
+    String id;
+    String grade;
+
+    public void printInfo() {
+        System.out.println("name:\t" + this.name);
+        System.out.println("gender:\t" + this.gender);
+        System.out.println("birthday:\t" + this.birthday);
+        System.out.println("school:\t" + this.school);
+        System.out.println("id:\t" + this.id);
+        System.out.println("grade\t" + this.grade);
+    }
+}

实验4/src/Task5/Teacher.java

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+//Teacher.java
+package Task5;
+
+public class Teacher extends Person {
+    String school;
+    String id;
+
+    public void printInfo() {
+        System.out.println("name:\t" + this.name);
+        System.out.println("gender:\t" + this.gender);
+        System.out.println("birthday:\t" + this.birthday);
+        System.out.println("school:\t" + this.school);
+        System.out.println("id:\t" + this.id);
+    }
+}

实验4/src/Task5/TestPerson.java

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+//TestPerson.java
+package Task5;
+
+public class TestPerson {
+    public static void main(String[] args) {
+        Student s1 = new Student();
+        s1.name = "Jason Fate Chen";
+        s1.gender = "male";
+        s1.birthday = "May.5th.2005";
+        s1.school = "XJIT";
+        s1.id = "202301130071";
+        s1.grade = "1";
+        s1.printInfo();
+        Teacher t1 = new Teacher();
+        t1.name = "White";
+        t1.gender = "female";
+        t1.birthday = "Mar.7th.1993";
+        t1.school = "Tsinghua";
+        t1.id = "199303071145";
+        t1.printInfo();
+    }
+}

实验4/src/case1/Task1.java

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+package case1;
+
+import java.util.Scanner;
+
+public class Task1 {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        String dogName = sc.next();
+        String dogSex = sc.next();
+        String dogColor = sc.next();
+        String catName = sc.next();
+        String catSex = sc.next();
+        double catWeight = sc.nextDouble();
+        // 通过有参构造函数实例化Dog类对象dog
+        // dog调用talk()方法
+        // dog调用eat()方法
+        /********* begin *********/
+        Dog lucky = new Dog(dogName, dogSex, dogColor);
+        lucky.talk();
+        lucky.eat();
+        /********* end *********/
+        // 通过有参构造函数实例化Cat类对象cat
+        // cat调用talk()方法
+        // cat调用eat()方法
+        /********* begin *********/
+        Cat 哈基米 = new Cat(catName, catSex, catWeight);
+        哈基米.talk();
+        哈基米.eat();
+        /********* end *********/
+    }
+}
+
+// 抽象类Pet 封装属性name和sex
+// 构造函数初始化name和sex
+// 声明抽象方法talk()
+// 声明抽象方法eat()
+abstract class Pet {
+    /********* begin *********/
+    protected String name;
+    protected String 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 abstract void talk();
+
+    public abstract void eat();
+    /********* end *********/
+}
+
+// Dog类继承自Pet类 封装属性color
+// 构造函数初始化name、sex和color
+// 实现自己的talk()方法和eat()方法
+// talk()输出'名称：name，性别：sex，颜色：color，汪汪叫'
+// eat()输出'name吃骨头'
+class Dog extends Pet {
+    /********* begin *********/
+    private String color;
+
+    public String getColor() {
+        return color;
+    }
+
+    public void setColor(String color) {
+        this.color = color;
+    }
+
+    public Dog(String name, String sex, String color) {
+        this.name = name;
+        this.sex = sex;
+        this.color = color;
+    }
+
+    public void talk() {
+        System.out.println("名称:" + this.name + "，性别：" + this.sex + "，颜色：" + this.color + "，汪汪叫");
+    }
+
+    public void eat() {
+        System.out.println(this.name + "吃骨头");
+    }
+    /********* end *********/
+}
+
+// Cat类继承自Pet类 封装属性weight
+// 构造函数初始化name、sex和weight
+// 实现自己的talk()方法和eat()方法
+// talk()输出'名称：name，性别：sex，体重：weight kg，喵喵叫'
+// eat()输出'name吃鱼'
+class Cat extends Pet {
+    /********* begin *********/
+    private double weight;
+
+    public double getWeight() {
+        return weight;
+    }
+
+    public void setWeight(double weight) {
+        this.weight = weight;
+    }
+
+    public Cat(String name, String sex, double weight) {
+        this.name = name;
+        this.sex = sex;
+        this.weight = weight;
+    }
+
+    public void talk() {
+        System.out.println("名称:" + this.name + "，性别：" + this.sex + "，体重：" + this.weight + " kg，喵喵叫");
+    }
+
+    public void eat() {
+        System.out.println(this.name + "吃鱼");
+    }
+    /********* end *********/
+
+}