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[problem] java - wyszukiwanie binarne za pomocą collections • programosy.pl

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[problem] java - wyszukiwanie binarne za pomocą collections

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[problem] java - wyszukiwanie binarne za pomocą collections

Postprzez szef1 30 Lis 2010, 16:38

Witam. Mam za zadanie zaimplementować w programie z danymi osób wyszukiwarkę, która będzie korzystała z wyszukiwania binarnego za pomocą metod klasy usługowej Collections. Próbowałem różnych sposobów, ale ciągle napotykam różne błędy. Jeśli ktoś mógłby pomóc w dodaniu takiej wyszukiwarki, byłbym bardzo wdzięczny.
Kod mojego programu:
Kod: Zaznacz wszystko
package DaneOsob;
import java.awt.*;
import java.lang.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import java.awt.event.*;
import javax.swing.table.*;




class Panel extends JPanel implements ListSelectionListener
{ JTable tabela;
  DefaultTableModel model;
  ArrayList <Dane1> dane;
  int wiersz;
  static ArrayList <Dane1> arraylist= new ArrayList<Dane1>();



public Panel(ArrayList <Dane1> v)
{super();
  dane=v;
  final String[] columnNames = {"Nazwisko","Uwagi","Srednia"};
  model=new DefaultTableModel(columnNames,0);
  tabela= new JTable(model);
  model.addRow(new Vector<String>(3));
  tabela.setPreferredScrollableViewportSize(new Dimension(250,150));
  tabela.setSelectionMode(ListSelectionModel.SINGLE_SELECTION );
  ListSelectionModel selekcja = tabela.getSelectionModel();
  selekcja.addListSelectionListener(this);
  JScrollPane suwak = new JScrollPane(tabela);
  add(suwak);
  }

  public void valueChanged(ListSelectionEvent e)
   {
    if (e.getValueIsAdjusting()) return;
    ListSelectionModel lsm = (ListSelectionModel)e.getSource();
    if (!lsm.isSelectionEmpty())
      {wiersz = lsm.getMinSelectionIndex();
       System.out.println("Wiersz " + wiersz+ " jest wybrany.");
      }
    }

  public void wyswietl()
  {
      Iterator iterator = dane.iterator();
    model.setRowCount(0);
      int i=0;
    while(iterator.hasNext())
       { Dane1 t=(Dane1)iterator.next();
         Vector <String>vv=new Vector<String>(3);
         model.addRow(vv);
         model.setValueAt(t.Podaj_nazwisko(),i,0);
         model.setValueAt(t.Podaj_uwagi(),i,1);
         model.setValueAt(""+t.Podaj_srednia(),i,2);
         i++;
       }
     Vector <String>vv=new Vector<String>(3);
     model.addRow(vv);
  }

  public void obslugaactionPerformed()
   {if(tabela.isRowSelected(wiersz))
      {String nazwisko=(String)model.getValueAt(wiersz, 0);
       String uwagi=(String)model.getValueAt(wiersz, 1);
       String srednia=(String)model.getValueAt(wiersz, 2);
       if(nazwisko!=null&&uwagi!=null&&srednia!=null&&
        !nazwisko.equals("")&& !uwagi.equals("")
        &&!srednia.equals(""))
          {try
           {Float.parseFloat(srednia);
            Dane1 d=Dane1.Wstaw(nazwisko,uwagi, srednia);
            dane.add(d);
            Collections.sort(dane);
            wyswietl();
           }catch(NumberFormatException e)
            {JOptionPane.showMessageDialog(this,
                "Wprowadz poprawną średnią");}
          }
       }
   }
public void szukaj(){
     String s = JOptionPane.showInputDialog(null,"podaj nazwisko");
     
     
}
}


class Okno extends JFrame implements ActionListener
{
   //składniki interfesju graficznego użytkownika
   Panel  panel;
   JButton osobaOK ;
   JButton repaintOK ;
   JButton Szukaj ;
   JTextField szukaj;


   public Okno(ArrayList <Dane1>dane)
   {super("Dane osób");
    setSize(350,300);
    osobaOK=new JButton("Osoba OK");
    osobaOK.addActionListener(this);
    repaintOK=new JButton("Repaint OK");
    repaintOK.addActionListener(this);
    Szukaj=new JButton("Szukaj");
    Szukaj.addActionListener(this);
    szukaj=new JTextField("Wpisz nazwisko");
    szukaj.addActionListener(this);
    setDefaultLookAndFeelDecorated(true);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    panel = new Panel(dane);
    panel.setOpaque(true);
    panel.add(osobaOK);
    panel.add(repaintOK);
    panel.add(Szukaj);
    panel.add(szukaj);
    setContentPane(panel);
    setVisible(true);
  }



   public void actionPerformed(ActionEvent evt)
    { Object zrodlo=evt.getSource();
      if (zrodlo==osobaOK)
         panel.obslugaactionPerformed();
      else
      if (zrodlo==Szukaj)
         panel.szukaj();
      else
      if (zrodlo==repaintOK)
         panel.wyswietl();
          //wywołanie funkcji odświeżającej zawartość tabeli
      repaint(); //i pokazanie jej na ekranie
     }
}
public class DaneOsob
  {    static ArrayList<Dane1> dane=new ArrayList<Dane1>(5);

 
   

     static  public void main(String arg[])
        {  DaneOsob baza = new  DaneOsob();
           Okno okno = new Okno(baza.dane);
           ArrayList <Dane1> arraylist= new ArrayList<Dane1>();
           Collections.sort(arraylist);
           

        }
}


class Dane1 implements Comparable <Dane1>
{ String nazwisko;
   float srednia;
   String uwagi;


   public  void Nadaj_nazwisko(String lan)
    { nazwisko=lan;}
   public String Podaj_nazwisko()
    { return nazwisko;}
   public  void Nadaj_uwagi(String lan)
    { uwagi=lan;}
   public String Podaj_uwagi()
     { return uwagi;}
   public  void Nadaj_srednia(float srednia_)
    { srednia=srednia_;}
  public float Podaj_srednia()
     {return srednia;}

  public static Dane1 Wstaw(String nazwisko_, String uwagi_, String srednia_)
      { Dane1 d=new Dane1();
        d.Nadaj_nazwisko(nazwisko_);
        d.Nadaj_srednia(Float.parseFloat(srednia_));
        d.Nadaj_uwagi(uwagi_);
        return d;
      }

public String toString()
   {String napis="";
    napis+=" Nazwisko: "+nazwisko;
    napis+=" Srednia: "+srednia;
    napis+=" Uwagi: "+uwagi+"\n";
    return napis;
   }

  public boolean equals(Object o)
   { Dane1 d=(Dane1)o;
     return  nazwisko.equals(d.nazwisko)
             && srednia==d.srednia
             && uwagi.equals(d.uwagi);
   }

  public int hashCode() 
   {return nazwisko.hashCode()+(int)srednia+uwagi.hashCode();
    }
  public int compareTo(Dane1 o) /
   { return nazwisko.compareTo(o.nazwisko);
   }
}
...
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szef1
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[problem] java - wyszukiwanie binarne za pomocą collections

Postprzez Haczyk 30 Lis 2010, 20:35

szef1 napisał(a):Próbowałem różnych sposobów, ale ciągle napotykam różne błędy.

nie obraź się, ale na pewno "próbowałeś to zaprogramować", bo patrząc na Twój kod widzę tylko fragmenty - sorry za wyrażenie- "zerżnięte" z zofia.kruczkiewicz.staff.iiar.pwr.wroc.pl ?
może wkleisz jakie dokładnie "błędy" napotykasz ?
Pozdrawiam
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Haczyk
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Posty: 797
Dołączenie: 21 Sty 2006, 16:11
Miejscowość: Drzewica/Bydgoszcz
Pochwały: 62




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