Question

Java程序设计.在线等,求高手帮忙.

设计一个学生类CStudent,其数据成员是学生的注册号、姓名、数学、外语、计算机课程成绩，试着建立几个学生实例，输入相关信息，并在屏幕上显示出来。
2楼那位,运行的时候提示错误
s[0] = new Student("s001", "张三", 89, 93, 98);
s[1] = new Student("s002", "李四", 86, 79, 90);
s[2] = new Student("s003", "王五", 93, 80, 93);
s[3] = new Student("s004", "赵六", 81, 87, 80);

Answer 1

新建一个Student.java类，代码如下：

***************************************************************

public class Student {
// 注册号、姓名、数学、外语、计算机课程成绩
private String id;
private String name;
private Integer maths;
private Integer english;
private Integer computer;

public Student() {
}

public Student(String id, String name, Integer maths, Integer english,
Integer computer) {
this.id = id;
this.name = name;
this.maths = maths;
this.english = english;
this.computer = computer;
}

public String getId() {
return id;
}

public void setId(String id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public Integer getMaths() {
return maths;
}

public void setMaths(Integer maths) {
this.maths = maths;
}

public Integer getEnglish() {
return english;
}

public void setEnglish(Integer english) {
this.english = english;
}

public Integer getComputer() {
return computer;
}

public void setComputer(Integer computer) {
this.computer = computer;
}

public static void main(String[] args) {
Student[] s = new Student[4];
s[0] = new Student("s001", "张三", 89, 93, 98);
s[1] = new Student("s002", "李四", 86, 79, 90);
s[2] = new Student("s003", "王五", 93, 80, 93);
s[3] = new Student("s004", "赵六", 81, 87, 80);
System.out.println("学生信息如下：");
for (int i = 0; i < 4; i++) {
System.out.println("注册号：" + s[i].getId() + ", 姓名：" + s[i].getName()
+ ", 数学：" + s[i].getMaths() + ", 外语：" + s[i].getEnglish()
+ ", 计算机：" + s[i].getComputer());
}
}
}

***************************************************************

运行结果如下：

学生信息如下：
注册号：s001, 姓名：张三, 数学：89, 外语：93, 计算机：98
注册号：s002, 姓名：李四, 数学：86, 外语：79, 计算机：90
注册号：s003, 姓名：王五, 数学：93, 外语：80, 计算机：93
注册号：s004, 姓名：赵六, 数学：81, 外语：87, 计算机：80

***************************************************************
***************************************************************
***************************************************************

回答楼主问题补充：

我是在MyEclipse下运行的，你是在CMD里运行的吧，可能不识别汉语，这样，我把汉字全改为拼音或英文，你试试，代码如下：

***************************************************************

public class Student {
private String id;
private String name;
private Integer maths;
private Integer english;
private Integer computer;

public Student() {
}

public Student(String id, String name, Integer maths, Integer english,
Integer computer) {
this.id = id;
this.name = name;
this.maths = maths;
this.english = english;
this.computer = computer;
}

public String getId() {
return id;
}

public void setId(String id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public Integer getMaths() {
return maths;
}

public void setMaths(Integer maths) {
this.maths = maths;
}

public Integer getEnglish() {
return english;
}

public void setEnglish(Integer english) {
this.english = english;
}

public Integer getComputer() {
return computer;
}

public void setComputer(Integer computer) {
this.computer = computer;
}

public static void main(String[] args) {
Student[] s = new Student[4];
s[0] = new Student("s001", "zhangsan", 89, 93, 98);
s[1] = new Student("s002", "lisi", 86, 79, 90);
s[2] = new Student("s003", "wangwu", 93, 80, 93);
s[3] = new Student("s004", "zhaoliu", 81, 87, 80);
System.out.println("Students' information as follow: ");
for (int i = 0; i < 4; i++) {
System.out.println("ID: " + s[i].getId() + ", Name: "
+ s[i].getName() + ", Maths: " + s[i].getMaths()
+ ", English: " + s[i].getEnglish() + ", Computer: "
+ s[i].getComputer());
}
}
}

***************************************************************

运行结果如下：

Students' information as follow:
ID: s001, Name: zhangsan, Maths: 89, English: 93, Computer: 98
ID: s002, Name: lisi, Maths: 86, English: 79, Computer: 90
ID: s003, Name: wangwu, Maths: 93, English: 80, Computer: 93
ID: s004, Name: zhaoliu, Maths: 81, English: 87, Computer: 80

Answer 2

楼主真幽默。。
二楼写的是sql代码。。。你先搞清楚人家在说什么
再说别人有错误吧
你用JVM运行sql代码。。。

Answer 3

/*****************数据库是Oracle数据库************************/

create database stu;
use stu;
create table CStudent(num id,number,varchar(20),name varchar(20),math num,foLanguage num,computer num);

insert into CStudent values(1,'admin','admin',85,92,99);
insert into CStudent values(1,'wwe','wwe',85,92,99);
insert into CStudent values(1,'hhh','hhh',85,92,99);

select * from CStudent;

Answer 4

你是想写个java类 将数据库里面的东西查出来并且显示到web网页上吗？还是其它的意思？真的没看懂你具体想要实现的是什么！！！

我也给你写一个吧

class CStudent{

public static void main(string[] args)
{
CStudent student=new CStudent();
student.show_studentnews();
}
public Arraylist entry_studentnews()
{
Arraylist news1=null;
Arraylist news2=null;
news1.add("学号");
news1.add（"姓名"）;
news1.add（"数学成绩"）;
news1.add（"外语成绩"）;
news1.add（"计算机成绩"）;
news2.add(news1[0]);
return news2;
}
public void show_studentnews()
{
Arraylist news=entry_studentnews();
for(Arraylist i:news)
{
System.out.println(i[0]+i[1]+i[2]+i[3]+i[4]);
}
}
}

我刚刚写完 这个应该好用可能会有些中英文标点符号不同意自己修改下 （你要是能将我写的这些明白java基础就算入门了）

Answer 5

最简单的思路，把数据成员和输出语句写到一个类里 CStudent。然后再建一个学生个人信息类PStudent，把参数传到CStudent里的方法里，调用……
public class CStudent{
public void search(String id,String name, String shuxue,String yingyu){
System.out.println(id,name,shuxue,yingyu);
}
}
public class PStutend{
public String id;
public String name;
public String shuxue;
public String yingyu;
public void studentLi(){
id="1";
name="liming";
shuxue="100";
yingyu="101";
CStudent cs=new CStudent();
cs.search(id,name,shuxue,yingyu);
}
public void studentZhang(){
id="2";
name="ZhangHong";
shuxue="101";
yingyu="190";
CStudent cs=new CStudent();
cs.search(id,name,shuxue,yingyu);
}
public static void main(){
new PStudent().studentLi();
new PStudent().studentZhang();
}
}
虽然在设计上不是很合理，但能达到你的要求，适合初学者。