设计一个教师类Teacher

1. 设计一个教师类Teacher（属于cn包），要求：

1) 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。

2) 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。

3) 重写Teacher类的toString方法，通过该方法可以返回“编号为**、姓名为**、年龄为**的**学院老师”形式的字符串。

4) 由多个Teacher对象所形成的数组可以以两种方法排序（编号由低到高排序）：1）使用Arrays.sort(Object[] a)方法；2）使用Arrays.sort(Object[] a, Comparator c)方法。

5) 再定义一个类TeacherManagement（属于cn.sd包），提供方法search，方法可以在一组给定的教师中，根据姓名（或年龄）返回等于指定姓名（或年龄）的教师的字符串信息，信息格式为：“编号为**、姓名为**、年龄为**的**学院老师”。如果没有满足条件的教师，则返回“没有符合条件的教师”。

6) 构造main方法进行测试。

Teacher

package cn.net.sdkd;

public class Teacher implements Comparable {
	private int no, age;
	private String name, seminary;

	public Teacher(int no, String name, int age, String seminary) {
		this.no = no;
		this.age = age;
		this.name = name;
		this.seminary = seminary;
	}

	public void setNo(int no) {
		this.no = no;
	}

	public int getNo() {
		return no;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public int getAge() {
		return age;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getName() {
		return name;
	}

	public void setSeminary(String seminary) {
		this.seminary = seminary;
	}

	public String getSeminary() {
		return seminary;
	}

	public boolean equals(Teacher t) {
		return (this.getNo() == t.getNo()) ? true : false;
	}

	public String toString() {
		return "编号为" + this.no + "、姓名为" + this.name + "、年龄为" + this.age + "的" + this.seminary + "学院的老师 ";
	}

	public int compareTo(Object o) {
		Teacher otherTeacher = (Teacher) o;
		if (no < otherTeacher.no)
			return -1;
		if (no > otherTeacher.no)
			return 1;
		return 0;
	}
}

TeacherManagement

package cn.sd;

import cn.net.sdkd.Teacher;

public class TeacherManagement {
	public void search(Teacher[] teachers, int age) {
		int l = teachers.length, i;
		for (i = 0; i < l; i++) {
			if (age == teachers[i].getAge()) {
				System.out.println(teachers[i].toString());
				break;
			} else if (i == l - 1)
				System.out.println("没有符合条件的老师");
		}
	}

	public void search(Teacher[] teachers, String name) {
		int l = teachers.length, i;
		for (i = 0; i < l; i++) {
			if (name == teachers[i].getName()) {
				System.out.println(teachers[i].toString());
				break;
			} else if (i == l - 1)
				System.out.println("没有符合条件的老师");
		}
	}
}

main

package cn.net.sdkd;

import cn.sd.*;
import java.util.*;

public class mian {
	public static void main(String[] args) {
		Teacher[] teachers = new Teacher[4];
		teachers[0] = new Teacher(001, "MA", 32, "计院");
		teachers[1] = new Teacher(004, "SHAO", 31, "地科");
		teachers[2] = new Teacher(003, "SONG", 30, "机电");
		teachers[3] = new Teacher(002, "WU", 29, "艺术");

		if (teachers[1].equals(teachers[2])) {
			System.out.println(teachers[1].getName() + "老师和" + teachers[2].getName() + "老师学工号相同");
		} else {
			System.out.println(teachers[1].getName() + "老师和" + teachers[2].getName() + "老师学工号不相同");
		}
		if (teachers[2].equals(teachers[3])) {
			System.out.println(teachers[2].getName() + "老师和" + teachers[3].getName() + "老师学工号相同");
		} else {
			System.out.println(teachers[2].getName() + "老师和" + teachers[3].getName() + "老师学工号不相同");
		}

		System.out.println(teachers[3].toString());

		TeacherManagement a = new TeacherManagement();

		a.search(teachers, 30);
		a.search(teachers, "MA");
		a.search(teachers, "mama");

		System.out.println("按编号升序排列：");
		Arrays.sort(teachers);
		for (int i = 0; i < teachers.length; i++) {
			System.out.println(teachers[i].toString());
		}
	}
}