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JamesBong

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Posts posted by JamesBong

  1. Meniu diferit in functie de tipul de utilizator Android Studio

    in Programare

    Posted · Edited by JamesBong

    Salut, am o problema si se pare ca nu am gasit nicio rezolvare dupa multe ore in care am incercat.

     

    Am o aplicatie cu un formular de autentificare si dupa ce utilizatorul se logheaza as dori ca in functie de tipul de utilizator(normal user, admin) activitatea sa aiba un meniu cu optiuni diferit. 

     

    Problema cred ca e urmatoarea: 

    Valoarea variabilei isAdmin este luata din Firebase si onCreateOptionMenu() se executa inainte sa se execute onCreate() si sa poate lua valoarea din baza de date.

     

    20190709_130151.jpg

     

    Exista vreo alta metoda prin care sa pot face chestia asta cu meniu diferit.

     

    Orice sfat e binevenit. Multumesc.

     

  3. Help Java GUI

    in Programare

    Posted

    9 minutes ago, aismen said:

     

    E mult mai "curat" sa lucrezi cu GUI in FX, crede-ma, Swing/AWT apartin trecutului.

     

    Si mi-am adus aminte, poti sa folosesti FX Scene Builder, faci cu drag and drop ca baietii ca in Visual Studio.

    Nu as vrea sa folosesc un builder din prima, o sa ma apuc sa invat bazele FX si cum functioneaza componentele si proprietatile lor si apoi o sa incerc cu un builder. Daca ma bag cu un builder direct nu o sa am idee ce inseamna tot codul ala auto-generat. Multumesc de indrumari

     

    • Upvote 3

  5. Help Java GUI

    in Programare

    Posted

    Salut, am o problema legata de Java iar dupa cateva ore de cautare pe google nu am gasit rezolvarea.

     

    Am doua jFrame si as dori sa mut valorile din jFrame2 in jFrame1 si sa le afisez intr-un tabel. 

     

    Asta este main window

    gDffAWP.png

     

     

    Asta este frame din care vreau sa iau datele.

    uBJrYG7.png

     

    Nu stiu cum sa fac atunci cand apas pe submit in frame2, valorile din textboxes sa fie trimise automat in variabilele din jFrame1.

     

    Orice sugestie este binevenita. Multumesc.

     

  10. Ajutor SQL

    in Programare

    Posted

    Salut

     

    Am o problema si nu reusesc sa ii dau de cap.

    Am urmatoarele tabele dintr-o baza de date :

    HOlNuy8.png

     

    Iar ce am de facut este : Write an SQL statement to change any employee’s title. Assume the employee has just phoned in with his/her last name. 

     

    Varianta pe care am incercat-o cu un subquerry imi zice ca are syntax error.  

     

    Update 'titles' 

    set title = 'Senior Engineer'

    Where titles.emp_no = (select employees.emp_no

     from employees

    Where employees.last_name = 'Kalloufi');

     

    Ma poate ajuta cineva ?

    Multumesc.

  11. Intrebare pentru programatori

    in Off-topic

    Posted

    Salut. Eu sunt la facultate in UK (Computer science) in anul 1 si din ce se spune pe aici e greu sa vi cu facultatea din Romania si sa iti gasesti un job bun cam in orice domeniu, nu numai in IT.

     

    Ai sanse mult mai mari daca vi si faci aici o facultate. Se intra destul de usor si facultatea este platita de stat...dupa care trebuie sa dai banii inapoi, desigur.

     

    Dar dupa ce termini poti gasi un job bine platit deoarece cererea este destul de mare in domeniul IT. 

    • Upvote 1

  14. Ajutor java

    in Programare

    Posted

    Salut. Am o problema si nu reusesc sa ii dau de cap... incerc sa invat java facand diverse programe si acum incerc sa fac un ecommerce app in consola cu database. Incerc sa fac un login system in care userii sa fie stocati in o baza de date si as vrea cumva sa opresc query cand gaseste userul. Va multumesc

      

      public static void login(){
    
      System.out.println("Enter username: ");
      String username = input.next();
      System.out.println("Enter password: ");
      String password =  input.next();
      int error = 0;
      
      try{
        String SQL = "SELECT username, password FROM ADMINISTRATOR.users";
        
        ResultSet rs = stmt.executeQuery( SQL );
        
        while(rs.next()){
           if(rs.getString("username").contains(username) && rs.getString("password").equals(password)){
               System.out.println("Login successfull");               
               
               error=0;
               mainMenu();

           } else {
               error =1;        
           }
        }
        if(error == 1){
              System.out.println("Incorrect details. Returing to menu.");
              welcomeMenu(); 
              
        }           
         }catch (SQLException err) {
            System.out.println(err.getMessage() );
            }
}

     

  16. Ajutor program java

    in Programare

    Posted

    Salut. Va multumesc pentru sfaturi....foarte constructive :)) ..... Am facut un alt program prin care sa invat despre arrayList si cand dau enroll student cumva sare peste firstName si inregistreaza doar surname. Am tot incercat sa ii dau de cap si nu reusesc.

      

    import java.util.Scanner;
import java.util.ArrayList;

public class arrayList {

    static Scanner input = new Scanner(System.in);
	static ArrayList<String> firstName = new ArrayList<String>();
	static ArrayList<String> surname = new ArrayList<String>();
	
	public static void main(String[] args)
	{
		menu();
	}
	
	public static void menu()
	{
		byte choice;
		System.out.println("Main menu");
		System.out.println("*********");
		System.out.println("1. Enroll student");
		System.out.println("2. List students");
		System.out.println("Make a choice: ");
		choice = input.nextByte();
		
		switch(choice) {
		case 1:
			enroll();
			System.out.println("You have successfully added a student.");
			System.out.println();
			menu();
			break;
			
		case 2:
			list();
			menu();
			break;
		default:
			System.out.println("Please make a valid choice.");
			System.out.println();
			menu();
			break;
		}	
	}
	
	public static void list() {
		int n = 1;
		for(int x = 0; x < firstName.size();x++)
		{
			System.out.println(n + ". " + firstName.get(x) + " " + surname.get(x));
			n++;
		}
	}
	
	public static void enroll() {
		String fn, sn;
		System.out.println("Please enter the first name:");
		fn = input.nextLine();
		
		System.out.println("Please enter the surname:");
		sn = input.nextLine();
		
		firstName.add(fn);
		surname.add(sn);
		
	}
}

     

     

    Screen_Shot_2018_07_15_at_22_43_26.png

     

     

  17. Ajutor program java

    in Programare

    Posted

    Am facut cateva modificari la cod si acum primesc urmatoarea eroare dupa ce bag datele la enroll student si nu imi dau seama cum o pot rezolva.

    Screen_Shot_2018_07_13_at_20_54_45.png

    
public class Student {
	
	private   String[] firstname;
	private   String[] surname;
	private   String[] course;
	private   String[] adress;
	private   String[] tel;
	private   String[] email;
	private   String[] dob;
	private   String[] country;
	private   int[] fees;
	private   int[] id;
	private   int n = 0;
	private   int idn = 10000; 
    int studentCount = 0;
	
	public Student(String fn, String sn, String crse, String adr, String tel_,
			String mail, String db, String ctry)
	{
		
	    firstname[n] = fn;
		surname[n] = sn;
		course[n] = crse;
		adress[n] = adr;
		tel[n] = tel_;
		email[n] = mail;
		dob[n] = db;
		country[n] = ctry;
		id[n] = idn + 1;
		fees[n] = 9000;
		studentCount++;
		idn++;
		n++;
	}
	
	public void listStudent()
	{
		for(int x = 0; x < studentCount; x++)
		{
			System.out.printf("%s %s %s %s %s %s %s %s %d %d%n ", firstname[n], surname[n],
				course[n], adress[n], tel[n], email[n], dob[n], country[n], id[n], fees[n] );
			
		}
	}
}

     

      

    import java.util.Scanner;

public class StudentTest {

	static Scanner input = new Scanner(System.in);

	
	public static void main(String[] args)
	{
		
		menu();
		
	}
	public static void menu()
	{
		byte choice;
		
		System.out.println("*************************");
		System.out.println("* Bright Future College *");
		System.out.println("*************************");
		System.out.println("1. Enroll student");
		System.out.println("2. Pay fees");
		System.out.println("3. List students on a course");
		System.out.println("4. Change course");
		System.out.println("5. View student profile");
		System.out.println("6. Remove student from course");
		System.out.println("7. ****Management reporting****");
		System.out.println("8. Exit");
		choice = input.nextByte(); input.nextLine();
		
		switch(choice)
		{
		case 1:
			enroll();
			menu();
			break;			
		case 3:
			//Student.listStudent();	
		default:
			System.out.println("Please enter a valid option!");
			menu();	
		}
	}
	
	public static void enroll()
	{
		System.out.println("Please enter the first name: ");
		String fn = input.nextLine();
		System.out.println("Please enter the surname: ");
		String sn = input.nextLine();
		System.out.println("Please enter the course: ");
		String crse = input.nextLine();
		System.out.println("Please enter the full adress: ");
		String adr = input.nextLine();
		System.out.println("Please enter the telephone number: ");
		String tel_ = input.nextLine();
		System.out.println("Please enter the email: ");
		String mail = input.nextLine();
		System.out.println("Please enter the date of birth: ");
		String db = input.nextLine();
		System.out.println("Please enter the type of student(home or foreign ");
		String ctry = input.nextLine();
		Student student = new Student(fn, sn, crse, adr, tel_, mail, db, ctry);
	}
	
}

    Un sfat va rog.

     

  21. Ajutor program java

    in Programare

    Posted · Edited by JamesBong

    Salut

     

    Am de facut pentru facultate un program in Java si anume sistem pentru inregistrarea studentilor unei facultati.  Nu vreau sa scrie cineva programul pentru mine, am nevoie de ghidare, daca sunteti amabili.

    Screen_Shot_2018_07_12_at_21_00_42.pngScreen_Shot_2018_07_12_at_21_00_58.png

     

     

    Si iata ce am facut eu pana acum :

      

    
public class Student {

	private static String[] firstname;
	private static String[] surname;
	private static String[] course;
	private static String[] adress;
	private static String[] tel;
	private static String[] email;
	private static String[] dob;
	private static String[] country;
	private static int[] fees, id;
	private static int n = 0;
	private static int idn = 10000; 
	private static int studentCount = 0;
	
	public static void addStudent(String fn, String sn, String crse, String adr, String tel_,
			String mail, String db, String ctry)
	{
		
		firstname[n] = fn;
		surname[n] = sn;
		course[n] = crse;
		adress[n] = adr;
		tel[n] = tel_;
		email[n] = mail;
		dob[n] = db;
		country[n] = ctry;
		id[n] = idn + 1;
		fees[n] = 9000;
		studentCount++;
		idn++;
		n++;
	}
	
	public static void listStudent()
	{
		for(n = 0; n < studentCount; n++)
		{
			System.out.printf("%s %s %s %s %s %s %s %s %d %d%n ", firstname[n], surname[n],
				course[n], adress[n], tel[n], email[n], dob[n], country[n], id[n], fees[n] );
		}
	}
}

      

    import java.util.Scanner;

public class StudentTest {

	static Scanner input = new Scanner(System.in);

	
	public static void main(String[] args)
	{
		
		menu();
		
	}
	public static void menu()
	{
		byte choice;
		
		
			
		System.out.println("*************************");
		System.out.println("* Bright Future College *");
		System.out.println("*************************");
		System.out.println("1. Enroll student");
		System.out.println("2. Pay fees");
		System.out.println("3. List students on a course");
		System.out.println("4. Change course");
		System.out.println("5. View student profile");
		System.out.println("6. Remove student from course");
		System.out.println("7. ****Management reporting****");
		System.out.println("8. Exit");
		choice = input.nextByte(); input.nextLine();
		
		switch(choice)
		{
		case 1:
			enroll();
			menu();
			break;
			
		case 3:
			Student.listStudent();
			
		default:
			System.out.println("Please enter a valid option!");
			menu();
			
		}
		
	}
	
	public static void enroll()
	{
		System.out.println("Please enter the first name: ");
		String fn = input.nextLine();
		System.out.println("Please enter the surname: ");
		String sn = input.nextLine();
		System.out.println("Please enter the course: ");
		String crse = input.nextLine();
		System.out.println("Please enter the full adress: ");
		String adr = input.nextLine();
		System.out.println("Please enter the telephone number: ");
		String tel_ = input.nextLine();
		System.out.println("Please enter the email: ");
		String mail = input.nextLine();
		System.out.println("Please enter the date of birth: ");
		String db = input.nextLine();
		System.out.println("Please enter the type of student(home or foreign ");
		String ctry = input.nextLine();
		Student.addStudent( fn,  sn,  crse,  adr,  tel_,
				 mail,  db, ctry);
	}
	
}

    Asta am facut pentru inceput.

    Nu stiu exact cum sa inregistrez studenti noi, sau cum sa chem metoda din alta clasa sa inregistrez studenti.

     

    Orice sfat ar fi foarte apreciat.

  22. Ajutor Program Visual Basic

    in Programare

    Posted

    mersi pt ajutor, am rezolvat cu partea de search.  

       Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
       
        Dim search As String = TextBox2.Text
        Dim i As Long
        Dim LU, LL As Long

        LU = UBound(tel)
        LL = LBound(tel)

        For i = LL To LU
            If tel(i) = search Then
                MessageBox.Show("Student found")
                TextBox1.Text = fn(i)
                TextBox3.Text = sn(i)
                ComboBox1.Text = course(i)
            End If
        Next
    End Sub

    Nu prea gasesc informatii despre partea cum sterg un string din un array...

  23. Ajutor Program Visual Basic

    in Programare

    Posted

    Si cu partea de search am probleme :))

    Trebuie sa caut in array dupa numarul de telefon si tot ce imi da este Not Found, nu merge decat prima valoare. 

     Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
          
        Dim k As Integer = 0
        Dim search As String = TextBox2.Text
       
        If search = tel(k) Then

            MessageBox.Show("Student found")
            TextBox1.Text = fn(k)
            TextBox3.Text = sn(k)
            ComboBox1.Text = course(k)
            
        Else
            MessageBox.Show("Not found")
            k = k + 1

        End If

    End Sub

     

  24. Ajutor Program Visual Basic

    in Programare

    Posted

    2fC2mZC.jpg

    Multumesc pentru ajutor. Am rezolvat cu salvarea datelor in array.

     

    Acum incerc sa fac sa mearga cele doua sagetute sa pot da scroll printre studenti si nu reusesc.

     

    Private Sub Button5_Click(sender As Object, e As EventArgs) Handles Button5.Click
            Dim m As Integer
            m = 0
            TextBox1.Text = fn(m)
            m = m + 1
        End Sub

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