「java做成绩单」java成绩代码
今天给各位分享java做成绩单的知识，其中也会对java成绩代码进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！
本文目录一览：
求JAVA源代码
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class GradeStatistic {
public static void main(String[] args) {
GradeStatistic gs = new GradeStatistic();
ListMark list = new ArrayListMark();
float sum = 0;
while(true){
Scanner sc = new Scanner(System.in);
System.out.print("Please input student name: ");
String name = sc.nextLine();
if(name.equals("end")){
break;
}
System.out.print("Please input student score: ");
float score = sc.nextFloat();
sum += score;
list.add(gs.new Mark(name, score));
}
float max = list.get(0).getScore();
float min = list.get(0).getScore();
for(Mark mark: list){
if(max mark.getScore()){
max = mark.getScore();
}
if(min mark.getScore()){
min = mark.getScore();
}
}
float average = sum / list.size();
System.out.println("Average is: " + average);
System.out.println("Max is: " + max);
System.out.println("Min is: " + min);
}
private class Mark{
private String name;
private float score;
public Mark(String name, float score){
this.name = name;
this.score = score;
}
public String getName() {
return name;
}
public float getScore() {
return score;
}
}
}
----------------------
Please input student name: Zhang san
Please input student score: 100
Please input student name: Li Si
Please input student score: 91
Please input student name: Ec
Please input student score: 35
Please input student name: ma qi
Please input student score: 67
Please input student name: end
Average is: 73.25
Max is: 100.0
Min is: 35.0
Java急急急
package org.czj._04;
import java.io.*;
public class BufferedReaderDemo01 {
public static void main(String args[]) throws Exception {
BufferedReader buf = null; // 声明对象
FileInputStream fis = new FileInputStream("D:" + File.separator + "score.txt");
buf = new BufferedReader(new InputStreamReader(fis)); // 将字节流变为字符流
// 第1步、使用File类找到一个文件
File f= new File("d:" + File.separator + "scoreAnalysis.txt") ; // 声明File对象
// 第2步、通过子类实例化父类对象
Writer out = null ; // 准备好一个输出的对象
out = new FileWriter(f,true) ; // 通过对象多态性，进行实例化
String str = null; // 接收输入内容
while ((str = buf.readLine())!=null) {
System.out.println(str);
double score=getTotalScore(str);
str+="总分数："+score;
out.write(str+"\r\n") ; // 将内容输出，保存文件
}
// 第4步、关闭输出流
out.flush() ; // 强制性清空缓冲区中的内容
out.close() ;
}
public static double getTotalScore(String s){
String newStr=s.replaceAll("[^0-9.]", "_");
String [] score=newStr.split("_");
double sum=0;
for (String str : score) {
try {
sum+=Float.parseFloat(str);
} catch (NumberFormatException e) {}
}
return sum;
}
};
JAVA编程题！
//把你的那个表作成test3.txt放到D盘根，跑程序就好了
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
public class MyTest3 {
List stuInfoList = new ArrayList();
public MyTest3(){
printResult();
}
public void readFile() {
try {
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("d:\\test3.txt")));
String line = "";
int i=0;
while ((line = br.readLine()) != null) {
if(i++0){ //略过头上的汉字行
StudentInfo student = new StudentInfo(line.split(" "));
stuInfoList.add(student);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
class StudentInfo implements Comparable{
public int stuId;
public double pings;
public double qizhong;
public double qimo;
public double bishi;
public double zhongFeng;
public StudentInfo(){};
public StudentInfo(String[] info){
this.stuId = Integer.parseInt(info[0]);
this.pings = Integer.parseInt(info[1]);
this.qizhong = Integer.parseInt(info[2]);
this.qimo = Integer.parseInt(info[3]);
this.bishi = Integer.parseInt(info[4]);
this.zhongFeng = pings*0.1+qizhong*0.25+qimo*0.15+bishi*0.5;
}
public String getPingJunFeng(int size){
return pings/size +" "+qizhong/size+" "+qimo/size+" "+bishi/size+" "+zhongFeng/size;
}
public String toString(){
return stuId + " " +pings + " "+qizhong+" "+qimo+" "+bishi+" "+zhongFeng;
}
public int compareTo(Object arg0) {
StudentInfo info = (StudentInfo)arg0;
return (int)(info.zhongFeng-this.zhongFeng);
}
}
public void printResult(){
readFile();
System.out.println("学号 平时 期中 期末 笔试 总评分");
for(Iterator it=stuInfoList.iterator();it.hasNext();){
System.out.println(it.next());
}
System.out.println("-----------80分以上---------------\r\n学号 总评分");
for(Iterator it=stuInfoList.iterator();it.hasNext();){
StudentInfo info = (StudentInfo)it.next();
if(info.zhongFeng=80)
System.out.println(info.stuId + " "+info.zhongFeng);
}
System.out.println("-----------没有及格---------------\r\n学号 总评分");
for(Iterator it=stuInfoList.iterator();it.hasNext();){
StudentInfo info = (StudentInfo)it.next();
if(info.zhongFeng60)
System.out.println(info.stuId + " "+info.zhongFeng);
}
Collections.sort(stuInfoList);
System.out.println("-----------排序之后---------------\r\n学号 平时 期中 期末 笔试 总评分");
for(Iterator it=stuInfoList.iterator();it.hasNext();){
System.out.println(it.next());
}
StudentInfo pinjunfeng = new StudentInfo();
for(Iterator it=stuInfoList.iterator();it.hasNext();){
StudentInfo info = (StudentInfo)it.next();
pinjunfeng.bishi+=info.bishi;
pinjunfeng.pings+=info.pings;
pinjunfeng.qimo+=info.qimo;
pinjunfeng.qizhong+=info.qizhong;
pinjunfeng.zhongFeng+=info.zhongFeng;
}
System.out.println("-----------平均分---------------\r\n平时 期中 期末 笔试 总评分");
System.out.println(pinjunfeng.getPingJunFeng(stuInfoList.size()));
}
public static void main(String[] args) throws Exception {
new MyTest3();
}
}
这两道题代码怎么写java？
创建一个名字为“ReportCard”的类，然后用下边的内容全部替换掉，你会成为全班最亮的仔。
import java.util.HashMap;
/**
* 学生成绩单
*/
public class ReportCard {
public static void main(String[] args) {
ReportCard reportCard = new ReportCard("张三", "070602213");
reportCard.set("语文", 80.0);
reportCard.set("数学", 59.5);
reportCard.set("英语", 66.0);
reportCard.set("java", 80, 99.0);
reportCard.set("数据库", 80, 66.0);
reportCard.set("毛概", null);
System.out.println(reportCard.getStudentName() + "语文分数:" + reportCard.get("语文"));
System.out.println(reportCard.getStudentName() + "数学考核结果:" + (reportCard.isPassed("数学") ? "合格" : "不合格"));
System.out.println(reportCard.getStudentName() + "期末是否挂科：" + (reportCard.isAllPassed() ? "否" : "是"));
}
// 学生姓名
private String studentName;
// 学生学号
private String studentNumber;
// 成绩单
private HashMapString, CourseResult cards = new HashMap();
public ReportCard() {
}
public ReportCard(String studentName, String studentNumber) {
this.studentName = studentName;
this.studentNumber = studentNumber;
}
public Double get(String courseName){
CourseResult courseResult = cards.get(courseName);
return courseResult == null ? Double.NaN : courseResult.getStudentScore();
}
public void set(String courseName, Double studentScore){
CourseResult courseResult = new CourseResult(courseName, studentScore);
cards.put(courseName, courseResult);
}
public void set(String courseName, double passMark, Double studentScore){
CourseResult courseResult = new CourseResult(courseName, passMark, studentScore);
cards.put(courseName, courseResult);
}
public boolean isPassed(String courseName){
return cards.get(courseName).isPassed();
}
public boolean isAllPassed(){
for(CourseResult cr : cards.values()){
if ( ! cr.isPassed()) {
return false;
}
}
return true;
}
public String getStudentName() {
return studentName;
}
public String getStudentNumber() {
return studentNumber;
}
public void setStudentName(String studentName) {
this.studentName = studentName;
}
public void setStudentNumber(String studentNumber) {
this.studentNumber = studentNumber;
}
/**
* 课程
*/
class Course{
// 课程名称
protected String courseName;
// 及格分
protected double passMark = 60;
public Course(String courseName, Double passMark) {
this.courseName = courseName;
if ( passMark != null) {
this.passMark = passMark;
}
}
}
/**
* 课程成绩
*/
class CourseResult extends Course{
// 学生成绩
private Double studentScore;
public CourseResult(String courseName, Double studentScore) {
this(courseName, null, studentScore);
}
public CourseResult(String courseName, Double passMark, Double studentScore) {
super(courseName, passMark);
this.studentScore = studentScore == null ? Double.NaN : studentScore;
}
public boolean isPassed(){
return studentScore = passMark;
}
public String getCourseName() {
return courseName;
}
public double getPassMark() {
return passMark;
}
public Double getStudentScore() {
return studentScore;
}
}
编写一程序，用哈希表实现学生成绩单的存储与查询
import java.util.Hashtable;
声明引用了吗?
给你完整代码
学生类Student，代码如下：
class Student{
private String no;
private String name;
private Integer score;
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getScore() {
return score;
}
public void setScore(Integer score) {
this.score = score;
}
public String toString(){
return "学号：" + no + " 姓名：" + name + " 成绩：" + score;
}
}
主类HashTest，代码如下：
import javax.swing.*;
import java.util.Vector;
import java.util.Hashtable;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class HashTest extends JFrame {
JLabel lblsearchbyidorname;
JTextField txfidorname;
JButton btnsearchbyidorname;
JTable reader;
JButton btnadd;
JButton btndelete;
Hashtable ht;
Vector colnames;
JLabel lblno;
JLabel lblname;
JLabel lblscore;
JTextField addno;
JTextField addname;
JTextField addscore;
Vector data;
public HashTest() throws HeadlessException {
super("学生成绩管理");
ht = new Hashtable();
lblsearchbyidorname = new JLabel("学号：");
txfidorname = new JTextField(20);
lblno = new JLabel("学号");
lblname = new JLabel("姓名");
lblscore = new JLabel("分数");
addno = new JTextField(10);
addname = new JTextField(12);
addscore = new JTextField(10);
btnsearchbyidorname = new JButton("查找--");
btnadd = new JButton("新增");
btndelete = new JButton("删除");
colnames = new Vector();
colnames.add("学号");
colnames.add("姓名");
colnames.add("成绩");
data = new Vector();
reader = new JTable(new ReaderTableModel(data,colnames));
reader.setPreferredSize(new Dimension(700,260));
JPanel pnlsearch = new JPanel();
pnlsearch.add(lblsearchbyidorname);
pnlsearch.add(txfidorname);
pnlsearch.add(btnsearchbyidorname);
pnlsearch.add(btndelete);
JScrollPane scptable = new JScrollPane(reader,
ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
JPanel pnladd = new JPanel();
pnladd.add(lblno);
pnladd.add(addno);
pnladd.add(lblname);
pnladd.add(addname);
pnladd.add(lblscore);
pnladd.add(addscore);
pnladd.add(btnadd);
reader.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
ScoreHandler sh = new ScoreHandler();
btnadd.addActionListener(sh);
btndelete.addActionListener(sh);
btnsearchbyidorname.addActionListener(sh);
Container c = getContentPane();
c.add(pnlsearch,BorderLayout.NORTH);
c.add(scptable,BorderLayout.CENTER);
c.add(pnladd,BorderLayout.SOUTH);
setSize(600,400);
setVisible(true);
}
public static void main(String[] args) {
new HashTest();
}
class ScoreHandler implements ActionListener{
public void actionPerformed(ActionEvent e) {
JButton btn = (JButton)e.getSource();
if(btn == btnsearchbyidorname){
Object obj = ht.get(txfidorname.getText().trim());
if(obj == null){
JOptionPane.showMessageDialog(null,"没有找到！");
}else{
JOptionPane.showMessageDialog(null,"查询结果如下：\n" + obj.toString());
}
}else if(btn == btnadd){
Student stu = new Student();
stu.setName(addname.getText().trim());
stu.setNo(addno.getText().trim());
stu.setScore(Integer.valueOf(addscore.getText().trim()));
ht.put(stu.getNo(),stu);
addDataToTable(stu);
addname.setText("");
addno.setText("");
addscore.setText("");
}else if(btn == btndelete){
int index = reader.getSelectedRow();
if (index == -1){
JOptionPane.showMessageDialog(null,"你没有选择学生！");
}else{
String no = (String)reader.getValueAt(index,0);
Student stu = (Student)ht.remove(no);
JOptionPane.showMessageDialog(null,"学生成绩删除！\n" + stu.toString());
data.remove(index);
reader.repaint();
}
}
}
}
public void addDataToTable(Student stu){
Vector temp = new Vector();
temp.add(stu.getNo());
temp.add(stu.getName());
temp.add(stu.getScore());
data.add(temp);
reader.repaint();
}
}
java中用if做成绩单
如果可以修改，最好把java改成javascript
你的程序没有问题（可能思路有些问题，比如90怎么可能是优秀跟良好的）就是多了一个分号
html
head
title程序结构3SWITCH/title
/head
body
script language="javascript"
function c(form)
{var a=form.cnumber.value;
//{这里去掉
if(a=90a=100)
{document.write("优秀");}
if(a=80a=90)
{document.write("良好");}
if(a=70a=80)
{document.write("中等");}
if(a=60a=70)
{document.write("及格");}
if(a=60){document.write("不及格");}
}
/script
form
input name="cnumber" type="text" /br /
input name="button" type="button" onclick="c(form)" value="提交" /
/form
/body
/html
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