我有Java作业，这是对
在您的程序中，创建三个类：InputHandler，OutputHandler和Student类。 InputHandler类处理从输入文件中读取信息。它还包含一个Student对象数组，用于在其中存储信息。 OutputHandler类采用通过InputHandler类中的方法提供的学生数组。然后，应在“ results.txt”文件中打印每个学生的整个记录以及计算出的平均值。它还应计算并打印标准偏差。最后，Student类包含用于存储学生信息的字段。它还有一个称为getQuizAverage（）的方法，该方法计算并返回该特定学生的测验平均值，OutputHandler使用该方法将其打印在结果文件中。
输入文件
input.txt：
99091;穆罕默德; 7; 5.5; 7; 8; 9
99092; Khalid; 7; 5.5; 7; 8; 8
99093; Ali; 7; 5.5; 7; 8; 9
99094; Ahmad; 7; 5.5; 7; 8; 9
Output.txt
99091穆罕默德7 5.5 7 8 9 7.3
99092哈立德7 5.5 7 8 8 7.1
99093阿里7 5.5 7 8 9 7.3
99094艾哈迈德7 5.5 7 8 9 7.3
我只得到一个重复输出的问题
99094艾哈迈德7 5.5 7 8 9 7.3
99094艾哈迈德7 5.5 7 8 9 7.3
99094艾哈迈德7 5.5 7 8 9 7.3
99094艾哈迈德7 5.5 7 8 9 7.3
我的班级我有4个班级，学生，输入处理器，输出处理器，主
public class Student {
public String Name;
public String getName() {
return Name;
}
public void setName(String name) {
Name = name;
}
public String getID() {
return ID;
}
public void setID(String iD) {
ID = iD;
}
public double getQuiz1() {
return quiz1;
}
public void setQuiz1(double quiz1) {
this.quiz1 = quiz1;
}
public double getQuiz2() {
return quiz2;
}
public void setQuiz2(double quiz2) {
this.quiz2 = quiz2;
}
public double getQuiz3() {
return quiz3;
}
public void setQuiz3(double quiz3) {
this.quiz3 = quiz3;
}
public double getQuiz4() {
return quiz4;
}
public void setQuiz4(double quiz4) {
this.quiz4 = quiz4;
}
public double getQuiz5() {
return quiz5;
}
public void setQuiz5(double quiz5) {
this.quiz5 = quiz5;
}
public double getAvgQuiz() {
return avgQuiz;
}
public void setAvgQuiz(double avgQuiz) {
this.avgQuiz = avgQuiz;
}
public String ID;
public double quiz1;
public double quiz2;
public double quiz3;
public double quiz4;
public double quiz5;
public double avgQuiz;
public double getQuizAverage()
{
return ((quiz1+quiz2+quiz3+quiz4+quiz5)/5);
}
public Student() {
// TODO Auto-generated constructor stub
}
}
InputHandler
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
public class InputHandler {
Student[] myStudent = new Student[4];
public InputHandler(String fileName) {
this.inputData(fileName);
}
private void inputData(String fileName) {
try {
File file = new File(fileName);
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
String line;
while ((line = bufferedReader.readLine())!=null)
{
String[] parts = line.split(";");
for(int i=0;i<4;i++)
{
myStudent[i] = new Student();
myStudent[i].setID(parts[0]);
myStudent[i].setName(parts[1]);
myStudent[i].setQuiz1(Double.parseDouble(parts[2]));
myStudent[i].setQuiz2(Double.parseDouble(parts[3]));
myStudent[i].setQuiz3(Double.parseDouble(parts[4]));
myStudent[i].setQuiz4(Double.parseDouble(parts[5]));
myStudent[i].setQuiz5(Double.parseDouble(parts[6]));
}
}
fileReader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public Student [] getStudents() {
return myStudent;
}
}
OutputHandler
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
public class OutputHandler {
Student[] myStudent;
public OutputHandler(Student[] stds) {
myStudent = stds;
}
void writeData() throws IOException {
FileWriter writt = new FileWriter("output.txt");
for (int i = 0; i < 4; i++) {
writt.write(myStudent[i].ID + '\t' + myStudent[i].Name + '\t'
+ '\t' + myStudent[i].quiz1 + '\t' + myStudent[i].quiz2
+ '\t' + myStudent[i].quiz3 + '\t' + myStudent[i].quiz4
+ '\t' + myStudent[i].quiz5 + '\t'+" "+myStudent[i].getQuizAverage());
writt.write('\n');
}
writt.close();
}
}
主功能
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
public class Main {
public static void main(String[] args) throws IOException {
InputHandler ih=new InputHandler("input.txt");
OutputHandler output1 = new OutputHandler(ih.getStudents());
output1.writeData();
}
}
最佳答案
您应该在InputHandler类inputData方法内删除一个for循环。因为您逐行阅读学生信息。再次循环是错误的。应该是这样
private void inputData(String fileName) {
try {
File file = new File(fileName);
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
String line;
int studentIndex = 0;
while ((line = bufferedReader.readLine())!=null)
{
String[] parts = line.split(";");
myStudent[studentIndex] = new Student();
myStudent[studentIndex].setID(parts[0]);
myStudent[studentIndex].setName(parts[1]);
myStudent[studentIndex].setQuiz1(Double.parseDouble(parts[2]));
myStudent[studentIndex].setQuiz2(Double.parseDouble(parts[3]));
myStudent[studentIndex].setQuiz3(Double.parseDouble(parts[4]));
myStudent[studentIndex].setQuiz4(Double.parseDouble(parts[5]));
myStudent[studentIndex].setQuiz5(Double.parseDouble(parts[6]));
studentIndex++;
}
fileReader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
关于java - Java重复输出的一部分，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/28971000/