student.java

这是我老师上课要我们编写的java小程序

import java.io.*;
import java.awt.*;
class stu//
{
	private int stunum;//定义学号
	int stubj;//班级
	String stuname;//姓名
	String stuxb;//性别
	int stuage;//年龄
	static String stuzy;//专业
	static int firstnum;//第一个人的学号
    stu(int a,String b,String c,int d)
	{
		stubj=a;
		stuname=new String(b);//实例化
		stuxb=c;  
		stuage=d;
		stunum=firstnum++;//赋值
	 }
	int getstunum()//获得学号
	{
		return stunum;
	 }
	int getstubj()//获得班级
	{
		return stubj;
	 }
	String getstuname()//获得姓名
	{
		return stuname;
	}
	String getstuxb()//获得性别
	{
		return stuxb;
	 }
	int getstuage()
	{
		return stuage;
	 }
	static{
		stuzy=("计算机科学与技术");
		firstnum=1001;	}//输入专业，学号
	int setstuage(int newage)//修改年龄
	{
		stuage=newage;
		return newage;
	}
	public String toString()
	{
		return("专业: "+stuzy+" 学号: "+getstunum()+" 班级: "
		+getstubj()+" 姓名: "+getstuname()+" 性别: "
		+getstuxb()+" 年龄: "+getstuage());
    }
}
 class student
	{
		public static void main(String args[])
		{
			stu stu1=new stu(2,"zhang","男生",20);
			stu stu2=new stu(1,"lisi","男生",15);
			stu stu3=new stu(3,"wang","女生",25);
			stu1.setstuage(21);
			stu2.setstuage(23);
            stu3.setstuage(20);//修改年龄
			System.out.println(stu1.toString());
			System.out.println(stu2.toString());
			System.out.println(stu3.toString());//输出三个学生的信息
		}

	}