java编制绩点代码 java成绩

用java编写一个绩点计算程序，输入科目，学分，成绩，求平均绩点，解决不了自主输入科目的问题，求解决！

数据库里面开一个字段，外面定义一个String变量，当你输入文字（科目）的适合，赋值给这个变量，之后用SQL语句插入到数据库的字段就可以了。

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用java写一个计算GPA成绩的程序

姓名和成绩我不知道你想怎样输入，只给出算GPA的算法，输入输出你自己来写吧，如果输入输出你不学的话，我也帮不了你。

//marks是一个学生成绩的数组，hours是该学生选课的学分的数组

private double getGPA(String[] marks, int[] hours)

{

double sumHour = 0;//总学分

double sumHourPoint = 0;//总学分绩点

for (int i = 0; i hours.length; i++)

{

sumHour += hours[i];

sumHourPoint += pointOf(marks[i]) * hours[i];

}

return sumHourPoint / sumHour;//GPA = 总学分绩点/总学分

}

private double pointOf(mark){//计算单科绩点

double point = 0;

switch(mark.charAt(0))

{

case 'A': point = 4;

case 'B': point = 3;

case 'C': point = 2;

case 'D': point = 1;

default: point = 0;

}

if(mark.length() 1)

{

switch(mark.charAt(1))

{

case '+': point += 0.5; break;

default: break;

}

}

return point;

}

求解这个JAVA程序怎么编？看不懂题意！

提供一些思路吧，编写一个Student类，其中有各种属性，比如名字：String name;

选修课程：String[] xuanxius;

平均成绩：double avg;

各科成绩：int[] chengjis;

平均成绩的get方法是：for循环各科成绩，进行相加，得到的总成绩再除以chengjis.length;得到的double值就是平均成绩

然后根据平均成绩进行判断，属于哪个段，就把对应的abcd输出就行了

输出就简单了吧，自己输出就行，要是有什么不明白可以追问

计算GPA和学分的java程序

import java.util.ArrayList;

import java.util.List;

import javax.swing.JOptionPane;

//名字；---

//课程名称#1；----

//总共学分：

//成绩：使用ABCDF计算格式；A=4分， B=3.。。

//有没有其他课程#2：Yes/no 名称---

//

//显示：

//

//名字：XXX

//课程 学分 成绩

//计算机课 4 B+

//数学 5 B

//平均点数GPA 3.0

class Course {

private String course;

private String unit;

private String grade;

private String score;

public String getCourse() {

return this.course;

}

public void setCourse(String course) {

this.course = course;

}

public String getUnit() {

return this.unit;

}

public void setUnit(String unit) {

this.unit = unit;

}

public String getGrade() {

return this.grade;

}

public void setGrade(String grade) {

this.grade = grade;

}

public String getScore() {

return this.score;

}

public void setScore(String score) {

this.score = score;

}

}

class GPAInfo {

private String name;

private ListCourse courseInfo;

private String gpa;

public String getName() {

return this.name;

}

public void setName(String name) {

this.name = name;

}

public ListCourse getCourseInfo() {

return this.courseInfo;

}

public void setCourseInfo(ListCourse courseInfo) {

this.courseInfo = courseInfo;

}

public String getGpa() {

return this.gpa;

}

public void setGpa(String gpa) {

this.gpa = gpa;

}

}

public class GPA {

public static void main(String[] args) {

String hasNextStudent = "y";

String hasNextCourse = "y";

ListGPAInfo gpaInfolist = new ArrayListGPAInfo();

while((hasNextStudent != null) "y".equals(hasNextStudent.toLowerCase())) {

GPAInfo gpaInfo = new GPAInfo();

String name = JOptionPane.showInputDialog("enter a name");

gpaInfo.setName(name);

ListCourse courselist = new ArrayListCourse();

while ((hasNextCourse != null) "y".equals(hasNextCourse.toLowerCase())) {

Course course = new Course();

String courseName = JOptionPane.showInputDialog(" What class do you have?");

course.setCourse(courseName);

String unit = JOptionPane.showInputDialog(" Enter the units you get");

course.setUnit(unit);

String grade = JOptionPane.showInputDialog(" Grade you get?");

course.setGrade(grade);

course.setScore(String.valueOf(getScore(grade.toCharArray()[0])));

courselist.add(course);

hasNextCourse = JOptionPane.showInputDialog(" other class? Yes or no");

}// while has next course

hasNextCourse = "y";

gpaInfo.setCourseInfo(courselist);

gpaInfo.setGpa(getGpa(courselist));

gpaInfolist.add(gpaInfo);

hasNextStudent = JOptionPane.showInputDialog(" other student? Yes or no");

}// while has next student

String output = "";

for (GPAInfo gpaInfo : gpaInfolist) {

output += "名字：" + gpaInfo.getName() + "\n";

output += "课程 学分 成绩" + "\n";

ListCourse courselist = gpaInfo.getCourseInfo();

for (Course course : courselist) {

output += course.getCourse() + " " + course.getUnit() + " " + course.getScore() + "\n";

}

output += "平均点数GPA " + gpaInfo.getGpa() + "\n\n";

}

JOptionPane.showMessageDialog(null, output);

System.exit(-1);

}

private static String getGpa(ListCourse courselist) {

double avg = 0;

int totalScore = 0;

int totalUnit = 0;

for (Course course : courselist) {

totalUnit += Integer.parseInt(course.getScore());

totalScore += Integer.parseInt(course.getUnit()) * Integer.parseInt(course.getScore());

}

if (totalUnit != 0) {

avg = totalScore / totalUnit;

}

if (avg 4) {

avg = 4;

}

return String.valueOf(avg);

}

private static int getScore(char score) {

int point;

score = Character.toUpperCase(score);

switch (score) {

case 'A':

point = 4;

break;

case 'B':

point = 3;

break;

case 'C':

point = 2;

break;

case 'D':

point = 1;

break;

default:

point = 0;

break;

}

return point;

}

}