java重复输出的一部分
我有Java赋值，这是对 在程序中创建三个类：java重复输出的一部分,java,eclipse,io,filereader,java-io,Java,Eclipse,Io,Filereader,Java Io,我有Java赋值，这是对 在程序中创建三个类：inputhHandler、outputhHandler和学生类。InputHandler类处理从输入文件读取信息。它还包含一个学生对象数组，用于存储其中的信息。OutputHandler类获取通过InputHandler类中的方法提供的学生数组。然后，它应该在'results.txt'文件中打印每个学生的全部记录以及计算出的平均值。还应计算并打印标准偏差。最后，学生类包含存储学生信息的字段。它还有一个名为getQuizAverage（）的方法，该方
inputhHandleroutputhHandlerInputHandlerOutputHandlerInputHandlerpublic 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
}
}
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;
}
}
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();
}
}
您应该删除InputHandler类inputData方法中的for循环。因为你逐行阅读学生信息。再次循环是错误的。应该是这样的
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();
}
}
在输入标题中，您试图将同一行的部分链接到所有对象。也需要在循环中输入行。请发布简短的代码，就像我在读故事一样！只要看看StackOverflow欢迎您，请参阅-在它的当前状态下，不清楚您想问什么。我用粗体字体回答了这个问题，关于这个问题，我不能说一点，因为这里的人总是要求我们对这个问题进行完整的描述，但是如果我没有一个循环，它将如何读取其他学生的所有信息。你正在使用
while（）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();
}
}