Help Please.. Sorting an array with a class.
Hello
I'm having trouble sorting an array that uses a class. I have to sort it by GPA and I can't quite get it.
Here's my code:
package test2;
import java.io.*;
public Main()
{
}
public static void main(String[] args) throws IOException
{
BufferedReader input = new BufferedReader (new InputStreamReader(System.in));
//System.out.println("Enter File 1");
//String file1 = input.readLine();
String file1 = "c:/studentfile1.dat";
//System.out.println("Enter File 2");
//String file2 = input.readLine();
String file2 = "c:/studentfile2.dat";
FileWriter OutputFile = new FileWriter ("c:/studentreport.csv");
PrintWriter OutFile = new PrintWriter (OutputFile);
// Create and Size Array
FileReader InputFile1 = new FileReader (file1);
BufferedReader InFile1 = new BufferedReader (InputFile1);
FileReader InputFile2 = new FileReader (file2);
BufferedReader InFile2 = new BufferedReader (InputFile2);
String arraycount1;
arraycount1 = InFile1.readLine();
String arraycount2;
arraycount2 = InFile2.readLine();
String buffer;
int File1Count = 0;
int File2Count = 0;
while (arraycount1 != null)
{
buffer = InFile1.readLine();
File1Count ++;
arraycount1 = InFile1.readLine();
}
while (arraycount2 != null)
{
buffer = InFile2.readLine();
buffer = InFile2.readLine();
File2Count ++;
arraycount2 = InFile2.readLine();
}
InFile1.close();
InFile2.close();
System.out.println (File1Count +" Students have been found.");
System.out.println ("And " +File2Count +" total entries have been located");
Student[] students = new Student[File2Count];
// End Create and Size Array
FileReader InputFile3 = new FileReader (file1);
BufferedReader InFile3 = new BufferedReader (InputFile3);
FileReader InputFile4 = new FileReader (file2);
BufferedReader InFile4 = new BufferedReader (InputFile4);
//Class
int StudentID;
String StudentName;
double GPA;
int HRS;
String GRADE;
//Class
String IDone;
String IDtwo;
String Name;
String gpa;
String hrs;
int idONE;
int idTWO;
IDone = InFile3.readLine();
idONE = Integer.parseInt(IDone);
Name = InFile3.readLine();
IDtwo = InFile4.readLine();
idTWO = Integer.parseInt(IDtwo);
for (int i = 0; i < File2Count; i++)
{
if (idONE == idTWO)
{
StudentID = idONE;
StudentName = Name;
hrs = InFile4.readLine();
HRS = Integer.parseInt(hrs);
gpa = InFile4.readLine();
GPA = Double.parseDouble(gpa);
GRADE = "A";
System.out.println ( StudentID + "," + StudentName + "," + GPA + "," + HRS + "," + GRADE );
students = new Student(StudentID, StudentName, HRS, GPA, GRADE);
}
IDtwo = InFile4.readLine();
if (IDtwo != null)
{
idTWO = Integer.parseInt(IDtwo);
if (idONE != idTWO)
{
IDone = InFile3.readLine();
idONE = Integer.parseInt(IDone);
Name = InFile3.readLine();
}
}
}
InFile3.close();
InFile4.close();
OutFile.close();
}
}
