I got confused I could write this kind of code and still has alot to write but couldnt manage it I f you can help me or at least give some recommendation I would really appreciate.
/*Title:Basic Student register program
**
*Description:This program takes 2 .text files about student and department available on the university,and reads it.
*In this program you can you can register new students with their name and ID'S in a specific department or you can delete. Additionally,
*You can limit the number of student registering in a department as well as you can view the registered students and available departments.
*into 2 .text files.
*
*User Guide:After you run the program you can see the menu as output.You can select
*any choice by selecting
*
* @author Ahmed S.Mustafa**
*/
import java.io.*;
import java.util.Scanner;
import java.applet.*;
class student {
private String sID;
private String sName;
public student (String Name, String ID) {
sID = ID;
sName = Name;
}
public void setsName (String Name) {
sName = Name;
}
public String getsName () {
return sName;
}
public void setsID (String ID) {
sID = ID ;
}
public String getsID () {
return sID;
}
public void Displaystudent ()
{
System.out.println("Name:" + sName + " ID:" + sID);
}
class department {
private String dDepartName;
private String dDID; //DID Means Department ID/code
private student [] stu = new student [5];
private Integer dNumOfStudents;
public department (String DepartName, String DID) {
dDepartName = DepartName;
dDID = DID;
}
public void setdDID (String DID) {
dDID = DID;
}
public String getdDID () {
return dDID;
}
public void setdDepart (String DepartName) {
dDepartName = DepartName; //
}
public String getdDepart () {
return dDepartName;
}
public int getdNumOfStudents () {
return dNumOfStudents;
}
public student [] getstu () {
return stu;
}
public void addstudent (student s){
if (dNumOfStudents < 6){
stu [dNumOfStudents] = s;
dNumOfStudents++;
}
else {
System.out.println("You cant add anymore students into the department of " + dDepartName);
}
}
public int Search (student s){
for (int i = 0; i < dNumOfStudents; i++) {
if (stu [i] .getsID () .equalsIgnoreCase(s.getsID() )) {
return i;
}
}
return -1; //// WHY -1 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
}
public void Displaydepartment () {
System.out.println("DID:" + dDID + " DepartName:" + dDepartName );
System.out.println(dDepartName + "'s Students:");/////WHY !!!!!
if (dNumOfStudents == 0) {
System.out.print("<>None");
} else {
for (int i = 0; i < dNumOfStudents; i++) {
System.out.print(stu [i].getsName() + " ");
}
}
}
}
abstract class Regist {
public abstract void ReadSt();
public abstract void ReadDp();
public abstract int SearchSt(String ID);
public abstract int SearchDp(String ID);
public abstract void Insertstudent(student s);
public abstract void Insertdepartment(department d);
public abstract void DeleteSt(String ID);
public abstract void DeleteDp(String DID);
public abstract void UpdateSt(String ID);
public abstract void UpdateDp(String DID);
public abstract void SelectDp(String DIDdp, String IDSt);
public abstract void studentQuery(String ID);
public abstract void departmentQuery(String DID);
public void ListDp() {
System.out.println("DID " + "Name " + "NumOfStudents;");
System.out.println("");
}
public void ListSt() {
System.out.println("ID " + "Name ");
System.out.println("");
}
public abstract void WriteFileDp();
public abstract void WriteFileSt();
public abstract void DisplayMenu();
}
class StuRegist extends Regist { ///ERRROR!!!!!!!!
protected department[] dp = new department[100];
protected student[] st = new student[100];
protected int countdp = 0;
protected int countst = 0;
public void ReadDp() {
try {
FileReader FRead = new
FileReader
("C://Users//hp//Documents//eclipseProjects//SemesterProject//department.txt");
BufferedReader in = new BufferedReader(FRead);
String line = in.readLine();
line = in.readLine();
while (line != null) {
String data[] = line.split("\t");
department d = new department(data[0], data[1]);
dp[countdp] = d;
countdp++;
line = in.readLine();
}
} catch (IOException e) {
System.out.println("Error:" + e);
}
}
public void ReadSt() {
try {
FileReader FRead = new
FileReader("C://Users//hp//Documents//eclipseProjects//SemesterProject//department.txt");
BufferedReader in = new BufferedReader(FRead);
String line = in.readLine();
line = in.readLine();
while (line != null) {
String data[] = line.split("\t");
student s = new student(data[0], data[1]);
st [countst] = s;
countst++;
line = in.readLine();
}
} catch (IOException e1) {
System.out.println("Error:" + e1);
}
}
public int SearchSt(String ID) {
for (int i = 0; i < countst; i++) {
if (st[i].getsID().equalsIgnoreCase(ID)) {
return i;
}
}
return -1;
}
public void Insertstudent(student s) {
if (SearchSt(s.getsID()) == -1) {
if (countst <= 100) {
st[countst] = s;
countst++;
} else {
System.out.println("You cannot add anymore student!");
}
} else {
System.out.println("Student " + st[SearchSt(s.getsID())].getsName() + " already exist");
}
}
public void DeleteSt(String ID) {
Scanner in = new Scanner(System.in);
if (SearchSt(ID) != -1) {
System.out.println("You re going to delete student " + st[SearchSt(ID)].getsName() + "!");
System.out.println("Enter y to continue or n to stop deletion");
String ans = in.next();
if (ans.equalsIgnoreCase("y")) {
st[SearchSt(ID)] = null;
System.out.println("Student is succesfully deleted.");
}
} else {
System.out.println("There is no student with the ID:" + ID + " in this university!");
}
}
public void SelectDp(String DIDdp, String IDst) {
if (SearchDp(DIDdp) != -1) {
if (SearchSt(IDst) != -1) {
dp[SearchDp(DIDdp)].addstudent(st[SearchSt(IDst)]);
System.out.println("Student" + st[SearchSt(IDst)].getsName()
+ " is succesfully selected dp " + dp[SearchDp(DIDdp)].getdDepart()); ////Error!!!!!!!!!!!
} else {
System.out.println("There is no student with the ID:" + IDst + " in this university!");
}
} else {
System.out.println("There is no department with the DID:" + IDst + " in this university!");
}
}
@Override
public void departmentQuery(String DID) {
if (SearchDp(DID) != -1) {
if (dp[SearchDp(DID)] != null) {
dp[SearchDp(DID)].Displaydepartment();
}
} else {
System.out.println("There is no department with the ID:" + DID + " in this university!");
}
}
///There may be an error you should check the parameters
public void DoctorQuery(String DID) {
if (SearchDp(DID) != -1) {
if (dp[SearchDp(DID)] != null) {
dp[SearchDp(DID)].Displaydepartment();
}
} else {
System.out.println("There is no department with the DID:" + DID + " in in our school!");
}
}
public void StudentQuery(String ID) {
if (SearchSt(ID) != -1) {
if (st[SearchSt(ID)] != null) {
st[SearchSt(ID)].Displaystudent();
}
} else {
System.out.println("There is no student with the ID:" + ID + " in this university!");
}
}
public void ListDp() {
super.ListDp();
for (int i = 0; i < countdp; i++) {
if (dp[i] != null) {
System.out.println(dp[i].getdDID() + " " + dp[i].getddepartName() + " " + dp[i].getdNumOfStudents());
}
}
}
@Override
public void ListSt() {
super.ListSt();
for (int i = 0; i < countst; i++) {
if (st[i] != null) {
System.out.println(st[i].getsID() + " " + st[i].getsName());
}
}
}
}
}
Sibeesh VenuPosted Nov 28, 2014, 6:58 AM
It may help you.