今天给大家发一下上期在文末题目的参考答案！

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：

<code>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 + '\'' +code>

", age=" + age +

", gender='" + gender + '\'' +code>

'}';

}

@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() + '\'' +code>

", age=" + getAge() +

", gender='" + getGender() + '\'' +code>

", studentId='" + studentId + '\'' +code>

'}';

}

@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！！