JavaSE基础知识分享(八)

合集 - Java(19)

1.JavaSE基础知识分享(一)2024-07-282.JavaSE基础编程十题(数据类型、运算符、选择语句、循环语句部分)2024-07-293.JavaSE基础知识分享(二)2024-07-304.JavaSE基础知识分享(二)相关练习题2024-08-015.JavaSE基础编程十题(数组和方法部分)2024-08-026.JavaSE基础知识分享(三)2024-08-057.JavaSE基础知识分享(三)相关练习题2024-08-078.JavaSE基础知识分享(四)2024-08-099.JavaSE基础知识分享(五)2024-08-1210.JavaSE基础知识分享(六)2024-08-1411.JavaSE基础知识分享(七)2024-08-15

12.JavaSE基础知识分享(八)2024-08-16

13.JavaSE基础知识分享(九)2024-08-1814.JavaSE基础知识分享(十)2024-08-1915.JavaSE基础知识分享(十一)2024-08-2016.JavaSE基础知识分享(十二)2024-08-2117.JavaSE基础知识分享(十三)2024-08-2218.JavaSE基础知识分享(十四)2024-08-2319.JavaSE基础知识分享(十五)2024-08-25

收起

写在前面

前面讲的是java中集合这部分的内容，今天给大家发一个上期题目参考答案！

Person类：

package com.shujia.TiMu_1000.ten2.Ti15;
 
/**
 * @author cjy
 * @create 2024-08-07-20:47
 */
public abstract class Person {
    private String name;
    private int age;
    private String gender;
 
    public Person() {
    }
 
    public Person(String name, int age, String gender) {
        this.name = name;
        this.age = setAge(age);
        this.gender = gender;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public int getAge() {
        return age;
    }
 
    private int setAge(int age) {
        if (age < 0) {
            System.out.println("年龄输入错误，默认为0");
            return 0;
        }
        return age;
    }
 
    public String getGender() {
        return gender;
    }
 
    public void setGender(String gender) {
        this.gender = gender;
    }
 
    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", gender='" + gender + '\'' +
                '}';
    }
 
    @Override
    protected void finalize() throws Throwable {
        try {
            System.out.println("对象 " + name + " 正在被销毁");
        } finally {
            super.finalize();
        }
    }
 
    public void increaseAge(int age) {
        if (age > 0 && setAge(this.age) != 0) {
            this.age += age;
        } else {
            System.out.println("你增加的年龄为负数，不能增加！");
        }
    }
 
    public abstract String speak();
}
 

School类：

package com.shujia.TiMu_1000.ten2.Ti15;
 
/**
 * @author cjy
 * @create 2024-08-07-21:05
 */
public class School {
    public Person[] people;
 
    public School() {
    }
 
    public School(int size) {
        people = new Person[size];
    }
 
    public void print(int index) {
        if (index >= 0 && index < people.length && people[index] != null) {
            System.out.println(people[index].speak());
        } else {
            System.out.println("索引超出范围或对象为空");
        }
    }
}
 

Student类:

package com.shujia.TiMu_1000.ten2.Ti15;
 
/**
 * @author cjy
 * @create 2024-08-07-20:58
 */
public class Student extends Person{
    private String studentId;
 
    public Student() {
    }
 
    public Student(String name, int age, String gender, String studentId) {
        super(name, age, gender);
        this.studentId = studentId;
    }
 
    public String getStudentId() {
        return studentId;
    }
 
    public void setStudentId(String studentId) {
        this.studentId = studentId;
    }
 
    @Override
    public String toString() {
        return "Student{" +
                "name='" + getName() + '\'' +
                ", age=" + getAge() +
                ", gender='" + getGender() + '\'' +
                ", studentId='" + studentId + '\'' +
                '}';
    }
 
    @Override
    public String speak() {
        return getName()+"正在学高数!!";
    }
 
}
 

Teacher类:

package com.shujia.TiMu_1000.ten2.Ti15;
 
/**
 * @author cjy
 * @create 2024-08-07-21:04
 */
public class Teacher extends Person implements Smoking{
    public Teacher() {
    }
 
    public Teacher(String name, int age, String gender) {
        super(name, age, gender);
    }
 
 
 
    @Override
    public String speak() {
        return getName()+"正在教高数!!";
    }
 
    @Override
    public void smoking() {
        System.out.println(getName()+"正在吸烟");
    }
 
    public void preparing(){
        System.out.println(getName()+"正在备课");
    }
}
 
 

Test类：

package com.shujia.TiMu_1000.ten2.Ti15;
 
/**
 * @author cjy
 * @create 2024-08-07-21:01
 */
public class Test {
    public static void main(String[] args) {
 
//        Person p4 = new Person("小明",21,"男");
//        System.out.println(p4.toString());
 
//        Person p4 = new Person("小明", 20, "男");
//        System.out.println(p4.toString());
//        System.out.println("================================");
//        p4.increaseAge(2);
//        System.out.println(p4.toString());
 
//        Student p1 =new Student("李子杰",23,"男","1001");
//        System.out.println(p1.toString());
 
 
        Student p1 =new Student("李子杰",23,"男","1001");
        Student p2 =new Student("尤海涛",22,"男","1002");
        Teacher p3 =new Teacher("黄崇涛",21,"男");
        School s1 = new School(3);
        s1.people[0] = p1;
        s1.people[1] = p2;
        s1.people[2] = p3;
        System.out.println(p1.speak());
        System.out.println(p2.speak());
        System.out.println(p3.speak());
        Teacher t1 = (Teacher)  s1.people[2];
        t1.preparing();
 
//
//        p3.smoking();
 
    }
}
 
 

抽烟接口：

package com.shujia.TiMu_1000.ten2.Ti15;
 
/**
 * @author cjy
 * @create 2024-08-08-20:15
 */
public interface Smoking {
    abstract void smoking();
}
 

好了，今天的分享就结束了。答案也是仅供参考，不代表最终答案，如果有错误或更简单的方法，欢迎在下面留言！！