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POI am trying to get the average of a certain student but it adds all the the values
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copied!<p>I am trying to get the average of a certain student but it adds all the the values. this is the output program</p> <pre> CMPE 325 Student Record Holder System -------------------------------- 1.Add Student 2.View Records 3.Update Students 4.Get Average 5.Exit -------------------------------- Enter your choice: 1 How many Students you want to input?: 2 Student[1]Enter Id Number: 1 First Name: Erwin Middle Name: asdasdas Last Name: sadasdas Degree: asdasdas Year Level: 1 Student[2]Enter Id Number: 2 First Name: INK Middle Name: asdasd Last Name: asdas Degree: sadas Year Level: 3 CMPE 325 Student Record Holder System -------------------------------- 1.Add Student 2.View Records 3.Update Students 4.Get Average 5.Exit -------------------------------- Enter your choice: 3 Enter Id Number: 1 ----------------Student Info-------------- Id Number: 1 Name:Erwin asdasdas sadasdas Degree and Year: asdasdas-1 The number of Subjects: 3 Name of Course: Law Enter Grade: 3 Name of Course: Laww2 Enter Grade: 1 Name of Course: Law4 Enter Grade: 2 Enter another subject and grade? [Y]or[N]n CMPE 325 Student Record Holder System -------------------------------- 1.Add Student 2.View Records 3.Update Students 4.Get Average 5.Exit ------------------------------- Enter your choice: 3 Enter Id Number: 2 ----------------Student Info-------------- Id Number: 2 Name:IDK asdasd asdas Degree and Year: sadas-3 The number of Subjects: 2 Name of Course: psych Enter Grade: 3 Name of Course: egg Enter Grade: 2 Enter another subject and grade? [Y]or[N]n CMPE 325 Student Record Holder System -------------------------------- 1.Add Student 2.View Records 3.Update Students 4.Get Average 5.Exit -------------------------------- Enter your choice: 4 ENTER ID NUMBER: 1 SUM: 11.0 AVERAGE: 2.2 </pre> <p>this is my Tester</p> <pre><code>import java.util.ArrayList; import java.util.Scanner; public class RecHolder { static ArrayList<Rec> record = new ArrayList<Rec>(); static ArrayList<Grade> records = new ArrayList<Grade>(); public RecHolder() { menu(); } @SuppressWarnings("resource") public static void menu() { Scanner in = new Scanner(System.in); int choice; System.out.println("CMPE 325 Student Record Holder System"); System.out.println("--------------------------------"); System.out.println("1.Add Student"); System.out.println("2.View Records"); System.out.println("3.Update Students"); System.out.println("4.Get Average"); System.out.println("5.Exit"); System.out.println(); System.out.println("--------------------------------"); System.out.print("Enter your choice: "); choice = in.nextInt(); switch (choice) { case 1: record(); break; case 2: display(); break; case 3: update(); break; case 4: average(); break; case 5: break; } } @SuppressWarnings("resource") public static void record() { Scanner in = new Scanner(System.in); int total; System.out.println("How many Students you want to input?: "); total = in.nextInt(); Rec[] student = new Rec[total]; for (int index = 0; index < student.length; index++) { student[index] = new Rec(); System.out.printf("Student[%d]", index + 1); System.out.println("Enter"); in.nextLine(); System.out.print("Id Number: "); student[index].setIdNumber(in.nextLine()); System.out.print("First Name: "); student[index].setFirstName(in.nextLine()); System.out.print("Middle Name: "); student[index].setMiddleName(in.nextLine()); System.out.print("Last Name: "); student[index].setLastName(in.nextLine()); System.out.print("Degree: "); student[index].setDegree(in.nextLine()); System.out.print("Year Level: "); student[index].setYearLevel(in.nextInt()); record.add(student[index]); } menu(); } @SuppressWarnings("resource") public static void displayall() { Scanner in = new Scanner(System.in); if(record.size() == 0) { System.out.print("Invalid\n"); in.nextLine(); menu(); } else { if(records.size() == 1){ System.out.print("-------------The Record for all Student-----------"); for (int i = 0; i < record.size(); i++) { System.out.printf("\nStudent[%d]", i + 1); System.out.print("\nId Number: " + record.get(i).getIdNumber()); System.out.print("\nName: "+ record.get(i).getFirstName() + " "+ record.get(i).getMiddleName() + " "+ record.get(i).getLastName()); System.out.print("\nDegree and Year: "+ record.get(i).getDegree() + "-"+ record.get(i).getYearLevel()+"\n\n"); } in.nextLine(); display(); } else{ System.out.print("--------------The Record for all Student------------"); for (int i = 0; i < record.size(); i++) { System.out.printf("\nStudent[%d]", i + 1); System.out .print("\nId Number: " + record.get(i).getIdNumber()); System.out.print("\nName: "+ record.get(i).getFirstName() + " "+ record.get(i).getMiddleName() + " "+ record.get(i).getLastName()); System.out.print("\nDegree and Year: "+ record.get(i).getDegree() + "-"+ record.get(i).getYearLevel()+"\n\n"); } // for(int loopforSubjct = 0 ; loopforSubjct < records.size(); loopforSubjct++ ) // { // System.out.printf("\nSubject: "+ records.get(loopforSubjct).getSubject()+" Grade: "+ records.get(loopforSubjct).getGrade()); // } in.nextLine(); } } display(); } @SuppressWarnings("resource") public static void specific() { Scanner in = new Scanner(System.in); if(record.size() == 0) { System.out.print("Enter Data 1st\n"); in.nextLine(); menu(); } else{ String id = new String(); System.out.print("Enter Id Number: "); id = in.nextLine(); if(records.size()==1){ for (int loopforSpcfc = 0; loopforSpcfc < record.size(); loopforSpcfc++) { if (id.equals(record.get(loopforSpcfc).getIdNumber())) { System.out.printf("\n ----------------Student Exists-------------- "); System.out.print("\nId Number: "+ record.get(loopforSpcfc).getIdNumber()); System.out.print("\nName:"+ record.get(loopforSpcfc).getFirstName() + " "+ record.get(loopforSpcfc).getMiddleName() + " "+ record.get(loopforSpcfc).getLastName()); System.out.print("\nDegree and Year: "+ record.get(loopforSpcfc).getDegree() + "-"+ record.get(loopforSpcfc).getYearLevel() + "\n\n");in.nextLine(); } else { in.nextLine(); System.out.print("Student Number Invalid!\n"); menu(); } } } else{ for (int loopforSpcfc = 0; loopforSpcfc < record.size(); loopforSpcfc++) { if (id.equals(record.get(loopforSpcfc).getIdNumber())) { System.out.printf("\nStudent Exists"); System.out.print("\nId Number: "+ record.get(loopforSpcfc).getIdNumber()); System.out.print("\nName: "+ record.get(loopforSpcfc).getFirstName() + " "+ record.get(loopforSpcfc).getMiddleName() + " "+ record.get(loopforSpcfc).getLastName()); System.out.print("\nDegree and Year: "+ record.get(loopforSpcfc).getDegree() + "-"+ record.get(loopforSpcfc).getYearLevel() +"\n\n"); System.out.println(); } } for(int loopforSubjct = 0 ; loopforSubjct < records.size(); loopforSubjct++ ) { System.out.printf("\nSubject: "+ records.get(loopforSubjct).getSubject()+" Grade: "+ records.get(loopforSubjct).getGrade()); } in.nextLine(); } } display(); } public static void update(){ @SuppressWarnings("resource") Scanner in = new Scanner(System.in); if(record.size() == 0) { System.out.print("Enter Data 1st\n"); in.nextLine(); menu(); } else{ String idnum = new String(); char answer; in.nextLine(); System.out.print("Enter Id Number: "); idnum = in.nextLine(); int total; for (int loopforSpcfc = 0; loopforSpcfc < record.size(); loopforSpcfc++) { if (idnum.equals(record.get(loopforSpcfc).getIdNumber())) { System.out.printf("\n ----------------Student Info-------------- "); System.out.print("\nId Number: "+ record.get(loopforSpcfc).getIdNumber()); System.out.print("\nName:"+ record.get(loopforSpcfc).getFirstName() + " "+ record.get(loopforSpcfc).getMiddleName() + " "+ record.get(loopforSpcfc).getLastName()); System.out.print("\nDegree and Year: "+ record.get(loopforSpcfc).getDegree() + "-"+ record.get(loopforSpcfc).getYearLevel() + "\n\n");in.nextLine(); } } for(int loop=0;loop<record.size();loop++){{ if(idnum.equals(record.get(loop).getIdNumber())){ System.out.println("The number of Sujects: "); total = in.nextInt(); do{ Grade[] update = new Grade[total]; for(int indexupdater = 0;indexupdater<update.length;indexupdater++){ update[indexupdater] = new Grade(); in.nextLine(); System.out.print("Name of Course: "); update[indexupdater].setSubject(in.nextLine()); System.out.print("Enter Grade: "); update[indexupdater].setGrade(in.nextDouble()); records.add(update[indexupdater]); } System.out.print("Enter another subject and grade? [Y]or[N]"); String ans = in.next(); answer = ans.charAt(0); }while(answer == 'y'); } } } } menu(); } public static void average() { Scanner in = new Scanner(System.in); if(record.size() == 0) { System.out.print("Enter Data 1st\n"); in.nextLine(); menu(); } else{ double sum=0; double average=0; String ID = new String(); System.out.print("Enter An Valid Id Number: "); for(int xx=0;xx<record.size();xx++){ if(ID.equals(record.get(xx).getIdNumber())) { for(int ind=0;ind<records.size();ind++) { sum += records.get(ind).getGrade(); } average=sum/records.size(); System.out.println(average); System.out.print("SUM: "+sum); System.out.print("\nAVERAGE: "+average); } } } } public static void display(){ Scanner input = new Scanner(System.in); int choice; System.out.println("--------------------------------"); System.out.println("1.View List"); System.out.println("2.View Specific Record"); System.out.println("3.Exit"); System.out.println(); System.out.println("--------------------------------"); System.out.print("Enter your choice: "); choice = input.nextInt(); switch (choice) { case 1: displayall(); break; case 2: specific(); break; case 3: menu(); break; } } public static void main(String[] args) { new RecHolder(); } } </code></pre> <p> This is for my Grades public class Grade {</p> <pre><code> private String IDNumber; private String subject; private double grade; private double average; public Grade() { String IDNum; String sub; double grad; double ave; } public Grade(String IDNum,String sub,double grad,double ave) { this.IDNumber=IDNum; this.subject=sub; this.grade=grad; this.average=ave; } public void setSubject(String subject) { this.subject=subject; } public String getSubject() { return subject; } public void setGrade(double grade) { this.grade=grade; } public double getGrade() { return grade; } public String getIDNumber() { return IDNumber; } } </code></pre> <p> for the StudntRecord public class Rec { private String IDNumber; private String firstName; private String middleName; private String lastName; private String degree; private int yearLevel;</p> <pre><code> @Override public String toString() { return ("ID Number: "+this.getIdNumber()+ "\nName: "+ this.getFirstName()+ " "+ this.getMiddleName()+ " "+ this.getLastName()+ "\nDegree and YearLevel: "+ this.getDegree() + " - " + this.getYearLevel()); } public Rec() { String IDNum; String fName; String mName; String lName; String deg; int level; } public Rec(String IDNum, String fName, String mName, String lName, String deg,int level ) { this.IDNumber=IDNum; this.firstName=fName; this.middleName=mName; this.lastName=lName; this.degree=deg; this.yearLevel=level; } public void setIdNumber(String IDNumber) { this.IDNumber = IDNumber; } public void setFirstName(String firstName) { this.firstName=firstName; } public void setMiddleName(String middleName) { this.middleName=middleName; } public void setLastName(String lastName) { this.lastName=lastName; } public void setDegree(String degree) { this.degree=degree; } public void setYearLevel(int yearLevel) { this.yearLevel=yearLevel; } public String getIdNumber() { return IDNumber; } public String getFirstName() { return firstName; } public String getMiddleName() { return middleName; } public String getLastName() { return lastName; } public String getDegree() { return degree; } public int getYearLevel() { return yearLevel; } } </code></pre>

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