用java面向对象的内容建立学生姓名，学号，id，班级，每一科的成绩，以及对管理员实现（对老师只实现查看）：通过名字查询成绩，通过学号查询成绩，通过id修改姓名，通过姓名修改成绩

这个问题如果用jsp和数据库的内容做那会非常简单，那么只用java面向对象来做呢？问题分析：本题首先需要建1.学生类2.班级类3.科目类4.对管理员和老师的接口（因为只有方法没有属性，用接口会简单一些）5.测试类

1.学生类，建立学生的名字，学号，id即可。然后构造学生方法，让每个班继承

public class Students {

public String
name;
public String
stunum;
public String
id;
public Subject[]
subject;
//构造学生的方法
public Students(String
name,String stuNum, String id){
this.name=name;
this.stunum=stuNum;
this.id=id;
}
}
2.班级类，继承学生类的属性并且设置班级属性为静态属性，不可改变
        一班

public class FirstClassStudent
extends Students{
//班级设置为静态属性，不可改变
public
static final String CLASS_NUMBER="java01";

public FirstClassStudent(String
name, String stuNum, String
id) {
super(name,
stuNum, id);
}
}
       二班

public class SecondClassStudent
extends Students{
public
static final String CLASS_NUMBER =
"java02";
public SecondClassStudent(String
name, String stuNum, String
id) {
super(name,
stuNum, id);
}
}
3.科目类  构建科目类方法，在测试类调用

public class Subject {

public String
subNum;
public String
subname;
public
int score;

public Subject(String
subNum,String subname,int
score){
this.subNum=subNum;
this.subname=subname;
this.score=score;
}
}
4.对管理员和老师的接口
(1)接口类 判断是不是学生操作【注：作者此处类名写的有问题，一般类名超过15字符当全部缩写，by等介词除外】

public interface IStudentOperator {

public void searchScoreByStudentName(Scanner
scanner,FirstClassStudent[] yiban);

public void sSBySNO(Scanner
scanner,FirstClassStudent[] yiBanSNO);

public void sSByAlter(Scanner
scanner,FirstClassStudent[] yiBanAlter);

public void sSByAlterName(Scanner
scanner,FirstClassStudent[] yiBanAlterName);

}
(2)管理员类 实现接口

public class Administrator
implements IStudentOperator{
@Override
public void s
4000
earchScoreByStudentName(Scanner
scanner,FirstClassStudent[] yiBan) {
System.out.println("管理员的查询过程");
System.out.print("请输入需要查询学生的姓名：");
String name =
scanner.next();
for(int
i=0;i<yiBan.length;i++){
if(yiBan[i].name.equals(name)){
Subject[]
sub = yiBan[i].subject;

System.out.println(name+"的成绩有:");

if(null ==
sub){
System.out.println("无选课成绩");
continue;
}

for(int
j=0;j<sub.length;j++){

System.out.print(sub[j].subname+"\t"+sub[j].score);
System.out.println();
}
}
}
}
@Override
public void sSBySNO(Scanner
scanner, FirstClassStudent[] yiBanSNO) {
System.out.println("管理员的查询过程");
System.out.print("请输入需要查询学生的学号：");
String stunum =
scanner.next();
for(int
i=0;i<yiBanSNO.length;i++){
if(yiBanSNO[i].stunum.equals(stunum)){
Subject[]
sub = yiBanSNO[i].subject;

System.out.println(stunum+"的人是"+yiBanSNO[i].name);
System.out.println(yiBanSNO[i].name+"的成绩有:

for(int
j=0;j<sub.length;j++){
System.out.print(sub[j].subname+"\t"+sub[j].score);
System.out.println();
}
}else{
System.out.println("查无此人");
}
}

}

@Override
public void sSByAlter(Scanner
scanner, FirstClassStudent[] yiBanAlter) {
System.out.println("管理员通过id修改的过程");
System.out.print("请输入该学生的id：");
String id =
scanner.next();
for(int
i=0;i<yiBanAlter.length;i++){
if(yiBanAlter[i].id.equals(id)){

Subject[]
sub = yiBanAlter[i].subject;
System.out.println(id+"的人是"+yiBanAlter[i].name);
System.out.println("请输入修改后的名字");
String
alterName=scanner.next();
yiBanAlter[i].name=alterName;
System.out.println("名字修改为"+yiBanAlter[i].name);
System.out.println(yiBanAlter[i].name+"的成绩为");
for(int
j=0;j<sub.length;j++){

System.out.print(sub[j].subname+"\t"+sub[j].score);
System.out.println();
}

}
}
}

@Override
public void sSByAlterName(Scanner
scanner, FirstClassStudent[] yiBanAlterName) {
System.out.println("管理员通过名字修改的成绩");
System.out.print("请输入该学生的名字：");
String name =
scanner.next();
for(int
i=0;i<yiBanAlterName.length;i++){
if(yiBanAlterName[i].name.equals(name)){

Subject[]
sub = yiBanAlterName[i].subject;
System.out.println(yiBanAlterName[i].name+"的成绩修改为");
int
alterScore=scanner.nextInt();
System.out.println(yiBanAlterName[i].name+"的成绩为");
for(int
j=0;j<sub.length;j++){
switch (sub[i].subname) {
case
"数学":

break;

default:
break;
}
sub[j].score=alterScore;

System.out.print(sub[j].subname+"\t"+sub[j].score);
System.out.println();
}

}
}
}
}
(3)老师类  同上

public class
Teacher implements IStudentOperator{

@Override
public void searchScoreByStudentName(Scanner
scanner,FirstClassStudent[] yiBan) {
System.out.println("老师的查询过程");
System.out.print("请输入需要查询学生的姓名：");
String name =
scanner.next();
for(int
i=0;i<yiBan.length;i++){
if(yiBan[i].name.equals(name)){
Subject[]
sub = yiBan[i].subject;

System.out.println(
1ab0d
name+"的成绩有:");

if(null ==
sub){
System.out.println("无选课成绩");
continue;
}

for(int
j=0;j<sub.length;j++){

System.out.print(sub[j].subname+"\t"+sub[j].score);
System.out.println();
}
}
}

}

@Override
public void sSBySNO(Scanner
scanner, FirstClassStudent[] yiBanSNO) {
System.out.println("老师的查询过程");
System.out.print("请输入需要查询学生的学号：");
String stunum =
scanner.next();
for(int
i=0;i<yiBanSNO.length;i++){
if(yiBanSNO[i].stunum.equals(stunum)){
Subject[]
sub = yiBanSNO[i].subject;

System.out.println(stunum+"的人是"+yiBanSNO[i].name);
System.out.println(yiBanSNO[i].name+"的成绩有:");

if(null ==
sub){
System.out.println("无选课成绩");
continue;
}

for(int
j=0;j<sub.length;j++){

System.out.print(sub[j].subname+"\t"+sub[j].score);
System.out.println();
}
}
}
}
}
5.测试类

public class Test {

public static
void main(String[] args) {
/*----------------------------------名字查询成绩------------------------------------*/
FirstClassStudent liuxiong =
new FirstClassStudent("刘雄",
"50", "50000");
FirstClassStudent wangyu =
new FirstClassStudent("王宇",
"48", "48000");
FirstClassStudent gouwenbo =
new FirstClassStudent("苟文博",
"16", "16000");
FirstClassStudent liuxiong1 =
new FirstClassStudent("刘雄",
"99", "99000");
//创建一班的数组
FirstClassStudent[]
yiBan = {liuxiong,wangyu,gouwenbo,liuxiong1};

Subject liuxiongmath =
new Subject("01",
"数学", 59);
Subject liuxiongEnglish =
new Subject("02",
"英语", 1);
Subject liuxiongyuwen =
new  Subject("03",
"语文", 59);
Subject liuxiongjisuanji =
new  Subject("04",
"计算机", 59);
Subject[] subs = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
liuxiong.subject =
subs;

Subject wangyumath =
new Subject("01",
"数学", 59);
Subject wangyuEnglish =
new Subject("02",
"英语", 1);
Subject wangyuyuwen =
new  Subject("03",
"语文", 59);
Subject wangyujisuanji =
new  Subject("04",
"计算机", 59);
Subject[] sub1 = {wangyuEnglish,wangyujisuanji,wangyumath,wangyuyuwen};
wangyu.subject =
sub1;

Subject gouwenbomath =
new Subject("01",
"数学", 59);
Subject gouwenboEnglish =
new Subject("02",
"英语", 1);
Subject gouwenboyuwen =
new  Subject("03",
"语文", 59);
Subject gouwenbojisuanji =
new  Subject("04",
"计算机", 59);
Subject[] sub2 = {gouwenboEnglish,gouwenbojisuanji,gouwenbomath,gouwenboyuwen};
gouwenbo.subject =
sub2;

Subject liuxiong1math =
new Subject("01",
"数学", 59);
Subject liuxiong1English =
new Subject("02",
"英语", 1);
Subject liuxiong1yuwen =
new  Subject("03",
"语文", 59);
Subject liuxiong1jisuanji =
new  Subject("04",
"计算机", 59);
Subject[] sub3 = {liuxiong1English,liuxiong1jisuanji,liuxiong1math,liuxiong1yuwen};
liuxiong1.subject =
sub3;

/*----------------------------------学号查询成绩------------------------------------*/
FirstClassStudent fifty =
new FirstClassStudent("刘雄",
"50", "50000");
FirstClassStudent foutyEight =
new FirstClassStudent("王宇",
"48", "48000");
FirstClassStudent sixteen =
new FirstClassStudent("苟文博",
"16", "16000");
FirstClassStudent nintynine =
new FirstClassStudent("刘雄",
"99", "99000");

FirstClassStudent[]
yiBanSNO = {fifty,foutyEight,sixteen,nintynine};

Subject fiftymath =
new Subject("01",
"数学", 59);
Subject fiftyEnglish =
new Subject("02",
"英语", 1);
Subject fiftyyuwen =
new  Subject("03",
"语文", 59);
Subject fiftyjisuanji =
new  Subject("04",
"计算机", 59);
Subject[] SNO1 = {fiftyEnglish,fiftyjisuanji,fiftymath,fiftyyuwen};
fifty.subject =
SNO1;

Subject foutyEightmath =
new Subject("01",
"数学", 59);
Subject foutyEightEnglish =
new Subject("02",
"英语", 1);
Subject foutyEightyuwen =
new  Subject("03",
"语文", 59);
Subject foutyEightjisuanji =
new  Subject("04",
"计算机", 59);
Subject[] SNO2 = {foutyEightEnglish,foutyEightjisuanji,foutyEightmath,foutyEightyuwen};
foutyEight.subject =
SNO2;

Subject sixteenmath =
new Subject("01",
"数学", 59);
Subject sixteenEnglish =
new Subject("02",
"英语", 1);
Subject sixteenyuwen =
new  Subject("03",
"语文", 59);
Subject sixteenjisuanji =
new  Subject("04",
"计算机", 59);
Subject[] SNO3 = {sixteenEnglish,sixteenjisuanji,sixteenmath,sixteenyuwen};
sixteen.subject =
SNO3;

Subject nintyninemath =
new Subject("01",
"数学", 59);
Subject nintynineEnglish =
new Subject("02",
"英语", 1);
Subject nintynineyuwen =
new  Subject("03",
"语文", 59);
Subject nintyninejisuanji =
new  Subject("04",
"计算机", 59);
Subject[] SNO4 = {nintynineEnglish,nintyninejisuanji,nintyninemath,nintynineyuwen};
nintynine.subject =
SNO4;

/*----------------------------------通过id修改姓名------------------------------------*/
FirstClassStudent alter50 =
new FirstClassStudent("刘雄",
"50", "50000");
FirstClassStudent alter48 =
new FirstClassStudent("王宇",
"48", "48000");
FirstClassStudent alter16 =
new FirstClassStudent("苟文博",
"16", "16000");
FirstClassStudent alter99 =
new FirstClassStudent("刘雄",
"99", "99000");

FirstClassStudent[]
yiBanAlter = {alter16,alter48,alter50,alter99};

Subject alter16math =
new Subject("01",
"数学", 59);
Subject alter16English =
new Subject("02",
"英语", 1);
Subject alter16yuwen =
new  Subject("03",
"语文", 59);
Subject alter16jisuanji =
new  Subject("04",
"计算机", 59);
Subject[] suba1 = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter16.subject =
suba1;

Subject alter50math =
new Subject("01",
"数学", 59);
Subject alter50English =
new Subject("02",
"英语", 1);
Subject alter50yuwen =
new  Subject("03",
"语文", 59);
Subject alter50jisuanji =
new  Subject("04",
"计算机", 59);
Subject[] suba2 = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter50.subject =
suba2;

Subject alter48math =
new Subject("01",
"数学", 59);
Subject alter48English =
new Subject("02",
"英语", 1);
Subject alter48yuwen =
new  Subject("03",
"语文", 59);
Subject alter48jisuanji =
new  Subject("04",
"计算机", 59);
Subject[] suba3 = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter48.subject =
suba3;

Subject alter99math =
new Subject("01",
"数学", 59);
Subject alter99English =
new Subject("02",
"英语", 1);
Subject alter99yuwen =
new  Subject("03",
"语文", 59);
Subject alter99jisuanji =
new  Subject("04",
"计算机", 59);
Subject[] suba4 = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter99.subject =
suba4;

/*----------------------------------通过姓名修改成绩------------------------------------*/
FirstClassStudent alterliuxiong =
new FirstClassStudent("刘雄",
"50", "50000");
FirstClassStudent alterwangyu =
new FirstClassStudent("王宇",
"48", "48000");
FirstClassStudent altergouwenbo =
new FirstClassStudent("苟文博",
"16", "16000");
FirstClassStudent alterliuxiong1 =
new FirstClassStudent("刘雄",
"99", "99000");

FirstClassStudent[]
yiBanAlterName = {altergouwenbo,alterliuxiong,alterliuxiong1,alterwangyu};

Subject alterliuxiongmath =
new Subject("01",
"数学", 59);
Subject alterliuxiongEnglish =
new Subject("02",
"英语", 1);
Subject alterliuxiongyuwen =
new  Subject("03",
"语文", 59);
Subject alterliuxiongjisuanji =
new  Subject("04",
"计算机", 59);
Subject[] subn1 = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alterliuxiong.subject =
subn1;

Subject altergouwenbomath =
new Subject("01",
"数学", 59);
Subject altergouwenboEnglish =
new Subject("02",
"英语", 1);
Subject altergouwenboyuwen =
new  Subject("03",
"语文", 59);
Subject altergouwenbojisuanji =
new  Subject("04",
"计算机", 59);
Subject[] subn2 = {gouwenboEnglish,gouwenbojisuanji,gouwenbomath,gouwenboyuwen};
altergouwenbo.subject =
subn2;

Subject alterwangyumath =
new Subject("01",
"数学", 59);
Subject alterwangyuEnglish =
new Subject("02",
"英语", 1);
Subject alterwangyuyuwen =
new  Subject("03",
"语文", 59);
Subject alterwangyujisuanji =
new  Subject("04",
"计算机", 59);
Subject[] subn3 = {wangyuEnglish,wangyujisuanji,wangyumath,wangyuyuwen};
alterwangyu.subject =
subn3;

Subject alterliuxiong1math =
new Subject("01",
"数学", 59);
Subject alterliuxiong1English =
new Subject("02",
"英语", 1);
Subject alterliuxiong1yuwen =
new  Subject("03",
"语文", 59);
Subject alterliuxiong1jisuanji =
new  Subject("04",
"计算机", 59);
Subject[] subn4 = {liuxiong1English,liuxiong1jisuanji,liuxiong1math,liuxiong1yuwen};
alterliuxiong1.subject =
subn4;

Scanner scanner =
new Scanner(System.in);

/*----------------------------------查看管理员是谁------------------------------------*/
IStudentOperator admin =
new Administrator();
IStudentOperator teacher =
new Teacher();
System.out.println("请输入角色");
System.out.println("0管理员\t1老师");
int
role = scanner.nextInt();
if(role==0){
admin =new Administrator();
}else
if(role==1){
teacher =
new Teacher();
}else{
System.out.println("无该角色");
return;
}

/*----------------------------------要执行的操作------------------------------------*/
System.out.print("请输入要执行的操作");
System.out.println("0：通过名字查询成绩\t1：通过学号查询成绩\t2:通过id修改姓名\t3：通过姓名修改成绩\t4：通过姓名删除成绩");
int
type = scanner.nextInt();

switch (type) {
case 0:
admin.searchScoreByStudentName(scanner,
yiBan);
break;
case 1:
admin.sSBySNO(scanner,
yiBanSNO);
break;
case 2:
admin.sSByAlter(scanner,
yiBanAlter);
break;
case 3:

break;

default:
System.out.println("抱歉！该功能正在制作中");
break;
}

}

}
public class Test {

public static
void main(String[] args) {
/*----------------------------------名字查询成绩------------------------------------*/
FirstClassStudent liuxiong =
new FirstClassStudent("刘雄",
"50", "50000");
FirstClassStudent wangyu =
new FirstClassStudent("王宇",
"48", "48000");
FirstClassStudent gouwenbo =
new FirstClassStudent("苟文博",
"16", "16000");
FirstClassStudent liuxiong1 =
new FirstClassStudent("刘雄",
"99", "99000");
//创建一班的数组
FirstClassStudent[]
yiBan = {liuxiong,wangyu,gouwenbo,liuxiong1};

Subject liuxiongmath =
new Subject("01",
"数学", 59);
Subject liuxiongEnglish =
new Subject("02",
"英语", 1);
Subject liuxiongyuwen =
new  Subject("03",
"语文", 59);
Subject liuxiongjisuanji =
new  Subject("04",
"计算机", 59);
Subject[] subs = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
liuxiong.subject =
subs;

Subject wangyumath =
new Subject("01",
"数学", 59);
Subject wangyuEnglish =
new Subject("02",
"英语", 1);
Subject wangyuyuwen =
new  Subject("03",
"语文", 59);
Subject wangyujisuanji =
new  Subject("04",
"计算机", 59);
Subject[] sub1 = {wangyuEnglish,wangyujisuanji,wangyumath,wangyuyuwen};
wangyu.subject =
sub1;

Subject gouwenbomath =
new Subject("01",
"数学", 59);
Subject gouwenboEnglish =
new Subject("02",
"英语", 1);
Subject gouwenboyuwen =
new  Subject("03",
"语文", 59);
Subject gouwenbojisuanji =
new  Subject("04",
"计算机", 59);
Subject[] sub2 = {gouwenboEnglish,gouwenbojisuanji,gouwenbomath,gouwenboyuwen};
gouwenbo.subject =
sub2;

Subject liuxiong1math =
new Subject("01",
"数学", 59);
Subject liuxiong1English =
new Subject("02",
"英语", 1);
Subject liuxiong1yuwen =
new  Subject("03",
"语文", 59);
Subject liuxiong1jisuanji =
new  Subject("04",
"计算机", 59);
Subject[] sub3 = {liuxiong1English,liuxiong1jisuanji,liuxiong1math,liuxiong1yuwen};
liuxiong1.subject =
sub3;

/*----------------------------------学号查询成绩------------------------------------*/
FirstClassStudent fifty =
new FirstClassStudent("刘雄",
"50", "50000");
FirstClassStudent foutyEight =
new FirstClassStudent("王宇",
"48", "48000");
FirstClassStudent sixteen =
new FirstClassStudent("苟文博",
"16", "16000");
FirstClassStudent nintynine =
new FirstClassStudent("刘雄",
"99", "99000");

FirstClassStudent[]
yiBanSNO = {fifty,foutyEight,sixteen,nintynine};

Subject fiftymath =
new Subject("01",
"数学", 59);
Subject fiftyEnglish =
new Subject("02",
"英语", 1);
Subject fiftyyuwen =
new  Subject("03",
"语文", 59);
Subject fiftyjisuanji =
new  Subject("04",
"计算机", 59);
Subject[] SNO1 = {fiftyEnglish,fiftyjisuanji,fiftymath,fiftyyuwen};
fifty.subject =
SNO1;

Subject foutyEightmath =
new Subject("01",
"数学", 59);
Subject foutyEightEnglish =
new Subject("02",
"英语", 1);
Subject foutyEightyuwen =
new  Subject("03",
"语文", 59);
Subject foutyEightjisuanji =
new  Subject("04",
"计算机", 59);
Subject[] SNO2 = {foutyEightEnglish,foutyEightjisuanji,foutyEightmath,foutyEightyuwen};
foutyEight.subject =
SNO2;

Subject sixteenmath =
new Subject("01",
"数学", 59);
Subject sixteenEnglish =
new Subject("02",
"英语", 1);
Subject sixteenyuwen =
new  Subject("03",
"语文", 59);
Subject sixteenjisuanji =
new  Subject("04",
"计算机", 59);
Subject[] SNO3 = {sixteenEnglish,sixteenjisuanji,sixteenmath,sixteenyuwen};
sixteen.subject =
SNO3;

Subject nintyninemath =
new Subject("01",
"数学", 59);
Subject nintynineEnglish =
new Subject("02",
"英语", 1);
Subject nintynineyuwen =
new  Subject("03",
"语文", 59);
Subject nintyninejisuanji =
new  Subject("04",
"计算机", 59);
Subject[] SNO4 = {nintynineEnglish,nintyninejisuanji,nintyninemath,nintynineyuwen};
nintynine.subject =
SNO4;

/*----------------------------------通过id修改姓名------------------------------------*/
FirstClassStudent alter50 =
new FirstClassStudent("刘雄",
"50", "50000");
FirstClassStudent alter48 =
new FirstClassStudent("王宇",
"48", "48000");
FirstClassStudent alter16 =
new FirstClassStudent("苟文博",
"16", "16000");
FirstClassStudent alter99 =
new FirstClassStudent("刘雄",
"99", "99000");

FirstClassStudent[]
yiBanAlter = {alter16,alter48,alter50,alter99};

Subject alter16math =
new Subject("01",
"数学", 59);
Subject alter16English =
new Subject("02",
"英语", 1);
Subject alter16yuwen =
new  Subject("03",
"语文", 59);
Subject alter16jisuanji =
new  Subject("04",
"计算机", 59);
Subject[] suba1 = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter16.subject =
suba1;

Subject alter50math =
new Subject("01",
"数学", 59);
Subject alter50English =
new Subject("02",
"英语", 1);
Subject alter50yuwen =
new  Subject("03",
"语文", 59);
Subject alter50jisuanji =
new  Subject("04",
"计算机", 59);
Subject[] suba2 = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter50.subject =
suba2;

Subject alter48math =
new Subject("01",
"数学", 59);
Subject alter48English =
new Subject("02",
"英语", 1);
Subject alter48yuwen =
new  Subject("03",
"语文", 59);
Subject alter48jisuanji =
new  Subject("04",
"计算机", 59);
Subject[] suba3 = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter48.subject =
suba3;

Subject alter99math =
new Subject("01",
"数学", 59);
Subject alter99English =
new Subject("02",
"英语", 1);
Subject alter99yuwen =
new  Subject("03",
"语文", 59);
Subject alter99jisuanji =
new  Subject("04",
"计算机", 59);
Subject[] suba4 = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter99.subject =
suba4;

/*----------------------------------通过姓名修改成绩------------------------------------*/
FirstClassStudent alterliuxiong =
new FirstClassStudent("刘雄",
"50", "50000");
FirstClassStudent alterwangyu =
new FirstClassStudent("王宇",
"48", "48000");
FirstClassStudent altergouwenbo =
new FirstClassStudent("苟文博",
"16", "16000");
FirstClassStudent alterliuxiong1 =
new FirstClassStudent("刘雄",
"99", "99000");

FirstClassStudent[]
yiBanAlterName = {altergouwenbo,alterliuxiong,alterliuxiong1,alterwangyu};

Subject alterliuxiongmath =
new Subject("01",
"数学", 59);
Subject alterliuxiongEnglish =
new Subject("02",
"英语", 1);
Subject alterliuxiongyuwen =
new  Subject("03",
"语文", 59);
Subject alterliuxiongjisuanji =
new  Subject("04",
"计算机", 59);
Subject[] subn1 = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alterliuxiong.subject =
subn1;

Subject altergouwenbomath =
new Subject("01",
"数学", 59);
Subject altergouwenboEnglish =
new Subject("02",
"英语", 1);
Subject altergouwenboyuwen =
new  Subject("03",
"语文", 59);
Subject altergouwenbojisuanji =
new  Subject("04",
"计算机", 59);
Subject[] subn2 = {gouwenboEnglish,gouwenbojisuanji,gouwenbomath,gouwenboyuwen};
altergouwenbo.subject =
subn2;

Subject alterwangyumath =
new Subject("01",
"数学", 59);
Subject alterwangyuEnglish =
new Subject("02",
"英语", 1);
Subject alterwangyuyuwen =
new  Subject("03",
"语文", 59);
Subject alterwangyujisuanji =
new  Subject("04",
"计算机", 59);
Subject[] subn3 = {wangyuEnglish,wangyujisuanji,wangyumath,wangyuyuwen};
alterwangyu.subject =
subn3;

Subject alterliuxiong1math =
new Subject("01",
"数学", 59);
Subject alterliuxiong1English =
new Subject("02",
"英语", 1);
Subject alterliuxiong1yuwen =
new  Subject("03",
"语文", 59);
Subject alterliuxiong1jisuanji =
new  Subject("04",
"计算机", 59);
Subject[] subn4 = {liuxiong1English,liuxiong1jisuanji,liuxiong1math,liuxiong1yuwen};
alterliuxiong1.subject =
subn4;

Scanner scanner =
new Scanner(System.in);

/*----------------------------------查看管理员是谁------------------------------------*/
IStudentOperator admin =
new Administrator();
IStudentOperator teacher =
new Teacher();
System.out.println("请输入角色");
System.out.println("0管理员\t1老师");
int
role = scanner.nextInt();
if(role==0){
admin =new Administrator();
}else
if(role==1){
teacher =
new Teacher();
}else{
System.out.println("无该角色");
return;
}

/*----------------------------------要执行的操作------------------------------------*/
System.out.print("请输入要执行的操作");
System.out.println("0：通过名字查询成绩\t1：通过学号查询成绩\t2:通过id修改姓名\t3：通过姓名修改成绩\t4：通过姓名删除成绩");
int
type = scanner.nextInt();

switch (type) {
case 0:
admin.searchScoreByStudentName(scanner,
yiBan);
break;
case 1:
admin.sSBySNO(scanner,
yiBanSNO);
break;
case 2:
admin.sSByAlter(scanner,
yiBanAlter);
break;
case 3:

break;

default:
System.out.println("抱歉！该功能正在制作中");
break;
}

}
解析：这种问题的难点在于如何建立唯一属性和其他属性的关系（数据库中的主码和非主码的关系）