用java编写一个简单例子，题目如下

Question

编写一个student类，其中包括（姓名、学号、班级、年龄、家庭住址）和取得这些
属性的方法，再增加一个sayHello()方法，用于输出学生的详细信息（1）创建Student
类的对象，编写程序测试这些方法。（2）创建两个学生对象，并比较二者的年龄，输出
年龄较大者的学生信息

Answer 1

package test;

public class Student {
private String name;
private String id;
private String clazz;
private int age;
private String address;

/**
* sayHello方法
*/
public void sayHello() {
System.out.println("学号为" + this.id + "的同学的具体信息如下：");
System.out.println("姓名：" + this.name);
System.out.println("班级：" + this.clazz);
System.out.println("年龄：" + this.age);
System.out.println("家庭住址：" + this.address);
}

/**
* 测试方法
*
* @param args
*/
public static void main(String[] args) {
// 第一问
Student student = new Student();
student.setAddress("百度知道");
student.setAge(1);
student.setClazz("一班");
student.setId("071251000");
student.setName("lsy605604013");
student.sayHello();

// 第二问
Student studentNew = new Student();
studentNew.setAddress("搜搜知道");
studentNew.setAge(2);
studentNew.setClazz("二班");
studentNew.setId("071251001");
studentNew.setName("lady");
if (student.getAge() < studentNew.getAge())
studentNew.sayHello();
else if (student.getAge() > studentNew.getAge())
student.sayHello();
else
System.out.println("两人一样大");

}

public String getName() {
return name;
}

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

public String getId() {
return id;
}

public void setId(String id) {
this.id = id;
}

public String getClazz() {
return clazz;
}

public void setClazz(String clazz) {
this.clazz = clazz;
}

public int getAge() {
return age;
}

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

public String getAddress() {
return address;
}

public void setAddress(String address) {
this.address = address;
}

}

Answer 2

java:

  @Test
void contextLoads() {
Student student = new Student ("张三","1","三年级四班",18,"xxx");
Student student2 = new Student ("张三","1","三年级四班",10,"xxx");
System.out.println (sayHello(student,student2));
}

private Student sayHello(Student student, Student student2) {
return  student.getAge ()>student2.getAge ()? student:student2;
}

//    编写一个student类，其中包括（姓名、学号、班级、年龄、家庭住址）和取得这些
//    属性的方法，再增加一个sayHello()方法，用于输出学生的详细信息（1）创建Student
//    类的对象，编写程序测试这些方法。（2）创建两个学生对象，并比较二者的年龄，输出
//            年龄较大者的学生信息
}
@Data
class Student{
private String name; //姓名
private String stuId; //学号
private String stuClass;//班级
private Integer age;//年龄
private String homeAddr;//住址

public Student() {
}

public Student(String name, String stuId, String stuClass, Integer age, String homeAddr) {
this.name = name;
this.stuId = stuId;
this.stuClass = stuClass;
this.age = age;
this.homeAddr = homeAddr;
}

@Override
public String toString() {
return "Student{" +
"name='" + name + '\'' +
", stuId='" + stuId + '\'' +
", stuClass='" + stuClass + '\'' +
", age=" + age +
", homeAddr='" + homeAddr + '\'' +
'}';
}
}

Answer 3

/**
* student类
*
*/
public class Student {
private String name;
private String id;
private String clazz;
private int age;
private String address;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getClazz() {
return clazz;
}
public void setClazz(String clazz) {
this.clazz = clazz;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public Student() {

}
public Student(String name, String id, String clazz, int age,
String address) {
this.name = name;
this.id = id;
this.clazz = clazz;
this.age = age;
this.address = address;
}
public void sayHello(){
System.out.println(getName()+"的详细信息如下：");
System.out.println("学号："+getId());
System.out.println("班级："+getClazz());
System.out.println("年龄："+getAge());
System.out.println("地址："+getAddress());
}
}

/**
* 测试类
*
*/
public class Test {
public static void main(String[] args) {
// Student st1 = new Student("张三", "0000001", "一班", 15, "张三家");
// Student st2 = new Student("李四", "0000002", "二班", 16, "李四家");
Student st1 = new Student();
Student st2 = new Student();
st1.setName("张三");
st1.setId("000001");
st1.setClazz("一班");
st1.setAge(15);
st1.setAddress("张三家");
st2.setName("李四");
st2.setId("000002");
st2.setClazz("二班");
st2.setAge(16);
st2.setAddress("李四家");

if(st1.getAge()>st2.getAge()){
System.out.println(st1.getName()+"年龄比"+st2.getName()+"大，下面将输出"+st1.getName()+"的详细信息");
st1.sayHello();
}else if(st1.getAge()<st2.getAge()){
System.out.println(st2.getName()+"年龄比"+st1.getName()+"大，下面将输出"+st2.getName()+"的详细信息");
st2.sayHello();
}else {
System.out.println(st1.getName()+"和"+st2.getName()+"年龄相同");
}
}
}

Answer 4

按照OO的思想，比较操作实现接口比较好。代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MyCSharpProjects
{
class Student:IComparable
{
#region private fields
private string name;
private string id;
private string grade;
private int age;
private string address;
#endregion

#region public properties
public string Name
{
get { return name; }
set { name = value; } // here you could apply pattern or regular expression to the name.
}
// ...其他属性类型，照抄即可。
#endregion

#region protected method
public override string ToString()
{
StringBuilder strbuilder = new StringBuilder();
strbuilder.Append("Name :");
strbuilder.AppendLine(Name);

// 其他属性找这个抄都写到strbuilder中

return strbuilder.ToString();
}

#endregion

#region public methods
public void SayHello()
{
this.ToString();
}

public override bool Equals(object obj)
{
if (CompareTo(obj) == 0)
return true;
return false;
}

public override int GetHashCode()
{
return base.GetHashCode();
}

public virtual int CompareTo(object obj)
{
Student s = obj as Student;

if (s != null)
{
if (s == this)
{
return 0;
}
else
{
if (s.Name == this.Name && s.id == this.id && s.grade == this.grade && s.age == this.age && s.address == this.address)
return 0;
else if (s.age > this.age)
{
return 1;
}
else
{
return -1;
}
}
}

throw new Exception("invalid type");
}

#endregion

}
}

Answer 5

我能独自完成作业！这里我的定义和张老师的不同， 张老师是鼓励大家讨论的其实也就是两种方式吧， 一种就是用实例， 就是给你一个例子， 要你用