教师类设计（equals、tostring改写）

设计一个教师类Teacher,要求：
属性有编号（int no）、姓名（String name）、年龄（int age）、所属学院（String seminary），为这些属性设置相应的get和set方法。
为Teacher类重写equals方法，要求：当两个教师对象的no相同时返回true。
重写Teacher类的toString方法，通过该方法可以返回“no: , name:, age: **, seminary: **”形式的字符串。

输入格式:

两个教师对象的编号，姓名，年龄，学院

输出格式:

教师的信息
两个教师是否相等

输入样例:

在这里给出一组输入。例如：

1 Linda 38 SoftwareEngineering
2 Mindy 27 ComputerScience

输出样例:

在这里给出相应的输出。例如：

no: 1, name:Linda, age: 38, seminary: SoftwareEngineering
no: 2, name:Mindy, age: 27, seminary: ComputerScience
false

解答

Teacher.java

import java.util.Objects;

class Teacher {
	private int no;
	private String name;
	private int age;
	private String seminary;
	// build
	public Teacher() {
		
	}
	public Teacher(int no, String name, int age, String seminary) {
		setNo(no);
		setName(name);
		setAge(age);
		setSeminary(seminary);
	}
	// set
	public void setNo(int no) {
		this.no = no;
	}
	public void setName(String name) {
		this.name = name;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public void setSeminary(String seminary) {
		this.seminary = seminary;
	}
	// get
	public int getNo() {
		return no;
	}
	public String getName() {
		return name;
	}
	public int getAge() {
		return age;
	}
	public String getSeminary() {
		return seminary;
	}
	// rewrite equals
	@Override
	public boolean equals(Object obj) {
		// 是否是同一个对象
        if (this == obj) { 
            return true;
        }
		// 传进来的对象为NULL或者二者为不同类
        if (obj == null || obj.getClass() != this.getClass()) { 
            return false;
        }
		// 类型转换
		Teacher teacher = (Teacher) obj;
		return this.getNo() == teacher.getNo();
	}
	//重写equals的同时也要重写hashCode
	@Override
	public int hashCode() { 
        return Objects.hash(no);
    }
	@Override
	// rewrite toString
	public String toString() {
		return "no: " + no + ", name:" + name + ", age: " + age + ", seminary: " + seminary;
	}
}
		

Main.java

import java.util.Scanner;

public class Main {
 
    public static void main(String[] args) {
		// input
        Scanner sc = new Scanner(System.in);
 
        int no1 = sc.nextInt();
        String name1 = sc.next();
        int age1 = sc.nextInt();
        String semi1 = sc.next();
		// set
        Teacher teacher1 = new Teacher(no1, name1, age1, semi1);
 
        int no2 = sc.nextInt();
        String name2 = sc.next();
        int age2 = sc.nextInt();
        String semi2 = sc.next();
		// set
        Teacher teacher2 = new Teacher(no2, name2, age2, semi2);
		// output
		System.out.println(teacher1.toString());
        System.out.println(teacher2.toString());
        System.out.println(teacher1.equals(teacher2));        
    }
}

Result