studenttest.java

编程之道--java程序设计入门源代码

/**
 *学生测试类
 */
public class StudentTest
{
	public static void main(String[] args)
	{
		//生成一个新的ClassManage类对象，职务是班长
		ClassManage monitor = new ClassManage("Tom", "20031009", "班长");
		
		Student[] student = new Student[3];//学生类数组，容量为3

		//数组初始化
		student[0] = monitor;
		student[1] = new Student("Jack", "2003100901");
		student[2] = new Student("Rose", "2002091002");
		
		for(int i = 0; i <student.length; i++)
		{
			System.out.println(student[i].toString());
		}
	}
}

/**
 *学生类，包括学生的基本信息
 */
class Student
{
	private String strName = "";//学生姓名
	private String strNumber = "";//学号
	private String strSex = "";//性别
	private String strBirthday = "";//出生年月
	private String strSpeciality = "";//专业
	private String strAddress = "";//地址

	public Student(String name, String number)
	{
		strName = name;
		strNumber = number;
	}

	public String getStudentName()
	{
		return strName;
	}

	public String getStudentNumber()
	{
		return strNumber;
	}

	public void setStudentSex(String sex)
	{
		strSex = sex;
	}

	public String getStudentSex()
	{
		return strSex;
	}

	public String getStudentBirthday()
		{
		return strBirthday;
	}
 
	public void setStudentBirthday(String birthday)
	{
		strBirthday = birthday;
	}

	public String getStudentSpeciality()
	{
		return strSpeciality;
	}

	public void setStudentSpeciality(String speciality)
	{
		strSpeciality = speciality;
	}

	public String getStudentAddress()
	{
		return strAddress;
	}

	public void setStudentAddress(String address)
	{
		strAddress = address;
	}

	public String toString()
	{
		String information = "学生姓名=" + strName + ", 学号=" + strNumber;  
		if( !strSex.equals("") )
			information += ", 性别=" + strSex;
		if( !strBirthday.equals(""))
			information += ", 出生年月=" + strBirthday;
		if( !strSpeciality.equals("") )
			information += ", 专业=" + strSpeciality;
		if( !strAddress.equals("") )
			information += ", 籍贯=" + strAddress;
		return information;
	}
}

/**
 *学生管理者类，增加了职务字段
 */
class ClassManage extends Student
{
	private String strDuty = "";

	public ClassManage(String name, String number, String strDuty)
	{
		super(name, number);//调用父类的构造器，初始化相关字段
		this.strDuty = strDuty;
	}

	public String getDuty()
	{
		return strDuty;
	}

	//覆盖父类的方法
	public String toString()
	{
		String str = super.toString();//调用父类中的方法
		if(!strDuty.equals(""))
		{
			str += ", 职务=" + strDuty;
		}
		
		return str;
	}
}