collegestudent.java

java继承类的使用 java继承类的使用

/**
 * @(#)CollegeStudent.java
 *
 *
 * @author 
 * @version 1.00 2008/3/31
 */

import student.Student;
public class CollegeStudent extends Student {
	
    private String stuPro;
    
    public CollegeStudent(String sno,String scl,String sna,String ssx,int sag,String pro) {
    	super(sno,scl,sna,ssx,sag);
    	setStuPro(pro);
    }
    
    public String getStuPro(){
    	return this.stuPro;
    }
    
    public void  setStuPro(String pro){
    	this.stuPro=pro;
    }
    
    //对超类中的toString方法进行重写
    public String toString(){
    	return super.getStuNo()+super.getStuClass()+super.getStuName()+super.getStuSex()+super.getStuAge()+this.stuPro;
    }
}

//测试程序的主类
class TestMainCollegeStudent{
	public static void main (String[] args) {
		Student stu=new Student("2008001","计算机1班","张三","男",24);
		CollegeStudent colStu=new CollegeStudent("2005180028","05计科","小明","女",22,"计算机科学与技术");
		System.out.println("两个学生的原始信息如下：");
		System.out.println("第一个学生："+stu.toString());
		System.out.println("第二个学生："+colStu.toString());
		System.out.println();
		
		stu.setStuName("小张");
		colStu.setStuPro("信息管理与信息系统专业");
		colStu.setStuNo("2005181028");
		colStu.setStuName("小吕");
		
		System.out.println("两个学生的修改后的信息如下：");
		System.out.println("第一个学生："+stu.toString());
		System.out.println("第二个学生："+colStu.toString());
		System.out.println();
    }
}