JAVA编程问题，求一个题的全部代码

public class Student {

private String name;

private int id;

private double englishScore;

private double chineseScore;

private double mathScore;

public Student(String name, int id, double englishScore, double chineseScore, double mathScore) {

super();

thisname = name;

thisid = id;

thisenglishScore = englishScore;

thischineseScore = chineseScore;

thismathScore = mathScore;

}

public String getName() {

return name;

}

public void setName(String name) {

thisname = name;

}

public int getId() {

return id;

}

public void setId(int id) {

thisid = id;

}

public double getEnglishScore() {

return englishScore;

}

public void setEnglishScore(double englishScore) {

thisenglishScore = englishScore;

}

public double getChineseScore() {

return chineseScore;

}

public void setChineseScore(double chineseScore) {

thischineseScore = chineseScore;

}

public double getMathScore() {

return mathScore;

}

public void setMathScore(double mathScore) {

thismathScore = mathScore;

}

public double getsumScore(){

return englishScore+chineseScore+mathScore;

}

}import javautilScanner;

public class StudentDemo {

private Student[] datas;

public void inputData(){

Scanner scanner = new Scanner(Systemin);

Systemoutprintln("请输入学生个数：");

int studentNum = scannernextInt();

     datas =new Student[studentNum];

for (int i = 0; i < dataslength; i++) {

Systemoutprintln("请输入学生学号：");

int id=scannernextInt();

Systemoutprintln("请输入学生姓名：");

String name = scannernext();

Systemoutprintln("请输入学生英语成绩：");

double englishScore=scannernextDouble();

Systemoutprintln("请输入学生数学成绩：");

double  mathScore=scannernextDouble();

Systemoutprintln("请输入语文成绩：");

double  chineseScore=scannernextDouble();

Student student = new Student(name, id, englishScore, chineseScore, mathScore);

datas[i]=student;

}

}

public String getScores(){

StringBuffer sb = new StringBuffer();

for (int i = 0; i < dataslength; i++) {

    sbappend("学生"+datas[i]getName()+"的总分是："+datas[i]getsumScore()+",");

}

return sbtoString();

}

public double getAllAvgScore(){

int len = dataslength;

double sum=0;

for (int i = 0; i < dataslength; i++) {

sum +=datas[i]getsumScore();

}

double avg=sum/len;

return avg;

}

public double[] getEachavgScore(){

int len=dataslength;

double chinessum=0;

double mathsum=0;

double englishsum=0;

for (int i = 0; i < dataslength; i++) {

chinessum+=datas[i]getChineseScore();

mathsum+=datas[i]getMathScore();

englishsum+=datas[i]getEnglishScore();

}

double chinAvg=chinessum/len;

double mathAvg=mathsum/len;

double englishAvg=englishsum/len;

double[] avgs ={chinAvg,mathAvg,englishAvg};

return avgs;

}

}public class Test {

public static void main(String[] args) {

StudentDemo demo = new StudentDemo();

demoinputData();

 String scores = demogetScores();

 Systemoutprintln(scores);

double[] eachavgScore = demogetEachavgScore();

Systemoutprintln("语文的平均总分是："+eachavgScore[0]);

Systemoutprintln("数学的平均总分是："+eachavgScore[1]);

Systemoutprintln("英语的平均总分是："+eachavgScore[2]);

double allAvgScore = demogetAllAvgScore();

Systemoutprintln("全班的平均总分是"+allAvgScore);

}

}结果：

请输入学生个数：

3

请输入学生学号：

0001

请输入学生姓名：

李晓明

请输入学生英语成绩：

78

请输入学生数学成绩：

88

请输入语文成绩：

69

请输入学生学号：

0002

请输入学生姓名：

张华

请输入学生英语成绩：

97

请输入学生数学成绩：

88

请输入语文成绩：

86

请输入学生学号：

0003

请输入学生姓名：

余小慧

请输入学生英语成绩：

78

请输入学生数学成绩：

98

请输入语文成绩：

65

学生晓明的总分是：2350,学生张华的总分是：2710,学生余小慧的总分是：2410,

语文的平均总分是：7333333333333333

数学的平均总分是：9133333333333333

英语的平均总分是：8433333333333333

全班的平均总分是2490

abstract class 员工{

    private String 姓名;

    private String 工号;

    private double 工资;

    private String 奖金属性;

    public 员工(String 姓名, String 工号, double 工资, String 奖金属性){

        this姓名 = 姓名;

        this工号 = 工号;

        this工资 = 工资;

        this奖金属性 = 奖金属性;

    }

    //生成上面的set get方法。

}

class 张三 extends 员工{

    public 张三(String 姓名, String 工号, double 工资, String 奖金属性) {

        super(姓名, 工号, 工资, 奖金属性);

    }

}

class 经理 extends 员工{

    public 经理(String 姓名, String 工号, double 工资, String 奖金属性) {

        super(姓名, 工号, 工资, 奖金属性);

    }

}

/

测试类

/

public class Util{

    public static void main(String[] args){

        //多态的理解思路

        员工 zhang = new 张三("张三","001",20001,"年终奖");

    }

}

public class Test {

public static void main(String[] args) {

Teacher teacher = new Teacher("Wang Laoshi", false, 19910123, "qinghua", 3);

Systemoutprintln(teachertoString());

CollegeStudent collStu = new CollegeStudent("College Student", true, 19851231, "Beijingdaxue","001", 2, "Computer", 3);

Systemoutprintln(collStutoString());

MiddleSchStudent middStu = new MiddleSchStudent("Middle schoole student", false, 19910705, "Di yi zhongxue", "002", 17, "English", 5);

Systemoutprintln(middStutoString());

}

}

abstract class Person {

protected String name;

protected boolean sex;

protected int birthday;

public Person(){}

public Person(String name, boolean sex, int birthday){

thisname =name;

thissex = sex;

thisbirthday = birthday;

}

public String toString(){

return "name:" + name + ", sex:" + sex + ", birthday: " + birthday;

}

}

class Teacher extends Person{

private String school;

private int schoolType;

public Teacher(){

}

public Teacher(String name, boolean sex, int birthday, String school, int schoolType){

super(name, sex, birthday);

thisschool = school;

thisschoolType = schoolType;

}

public String toString(){

return supertoString() + ", school: " + school + ", school type: " + schoolType;

}

}

abstract class Student extends Person{

protected String school;

protected String no;

protected int grade;

public Student(){

}

public Student(String name, boolean sex, int birthday, String school, String no, int grade){

super(name, sex, birthday);

thisschool = school;

thisno = no;

thisgrade = grade;

}

public String toString(){

return supertoString() + ", school:" + school + ", student no: " + no + ", studeng grade: " + grade;

}

}

class CollegeStudent extends Student{

private String major;

private int grade;

public CollegeStudent(){

}

public CollegeStudent(String name, boolean sex, int birthday, String school, String no, int grade, String major, int colledgeGrade){

super(name, sex, birthday,school, no,grade);

thismajor = major;

thisgrade = colledgeGrade;

}

public String toString(){

return supertoString() + ", major:" + major + ", grade: " + grade;

}

}

class MiddleSchStudent extends Student{

private int grade;

public MiddleSchStudent(){

}

public MiddleSchStudent(String name, boolean sex, int birthday, String school, String no, int grade, String major, int colledgeGrade){

super(name, sex, birthday,school, no,grade);

thisgrade = colledgeGrade;

}

public String toString(){

return supertoString() + ", grade: " + grade;

}

}

---------------测试

name:Wang Laoshi, sex:false, birthday: 19910123, school: qinghua, school type: 3

name:College Student, sex:true, birthday: 19851231, school:Beijingdaxue, student no: 001, studeng grade: 2, major:Computer, grade: 3

name:Middle schoole student, sex:false, birthday: 19910705, school:Di yi zhongxue, student no: 002, studeng grade: 17, grade: 5