HashSets Intersection

T

Tilli

Mitglied
Hallo zusammen!!!!

Ich sitze momentan an einem kleinen programm um den inhalt von drei HashSets zu vergleichen. Das programm besteht aus zwei klassen.
Die klasse Hash erzeugt 3 HashSets und berechnet die schnittmenge von allen 3 Hashsets. Die klasse HashGui befasst 3 TextAreas, welche mit werten gefüllt werden sowie einen ActionButton.

Wenn der Actionbutton angeklickt wird, werden die werte aus den 3 TextAreas in die 3 Hashsets eingelesen und die Schnittmenge berechnet. In einem vierten Textfeld soll dann die schnittmenge ausgegeben werden.

An irgendeiner Stelle liegt jedoch ein fehler und ich kann ihn nicht finden. Etwas läuft mit der berechnung der schnittmengen falsch oder mit dem einlesen der daten in die HashSets. Oder natürlich beides.

Der meiste code den ich selbst geschrieben habe sitzt im ActionLister der gui klasse und der
Hashklasse.

Kann mir jemand weiterhelfen?

Liebe Grüße

Tilli


Java: 
/*
 * HashGuiView.java
 */
package hashgui;

import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.text.BadLocationException;
import org.jdesktop.application.Action;
import org.jdesktop.application.ResourceMap;
import org.jdesktop.application.SingleFrameApplication;
import org.jdesktop.application.FrameView;
import org.jdesktop.application.TaskMonitor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.*;
import javax.swing.Timer;
import javax.swing.Icon;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JTextArea;

/**
 * The application's main frame.
 */
public class HashGuiView extends FrameView {

    public HashGuiView(SingleFrameApplication app) {
        super(app);

        initComponents();

        // status bar initialization - message timeout, idle icon and busy animation, etc
        ResourceMap resourceMap = getResourceMap();
        int messageTimeout = resourceMap.getInteger("StatusBar.messageTimeout");
        messageTimer = new Timer(messageTimeout, new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                statusMessageLabel.setText("");
            }
        });
        messageTimer.setRepeats(false);
        int busyAnimationRate = resourceMap.getInteger("StatusBar.busyAnimationRate");
        for (int i = 0; i < busyIcons.length; i++) {
            busyIcons[i] = resourceMap.getIcon("StatusBar.busyIcons[" + i + "]");
        }
        busyIconTimer = new Timer(busyAnimationRate, new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                busyIconIndex = (busyIconIndex + 1) % busyIcons.length;
                statusAnimationLabel.setIcon(busyIcons[busyIconIndex]);
            }
        });
        idleIcon = resourceMap.getIcon("StatusBar.idleIcon");
        statusAnimationLabel.setIcon(idleIcon);
        progressBar.setVisible(false);

        // connecting action tasks to status bar via TaskMonitor
        TaskMonitor taskMonitor = new TaskMonitor(getApplication().getContext());
        taskMonitor.addPropertyChangeListener(new java.beans.PropertyChangeListener() {

            public void propertyChange(java.beans.PropertyChangeEvent evt) {
                String propertyName = evt.getPropertyName();
                if ("started".equals(propertyName)) {
                    if (!busyIconTimer.isRunning()) {
                        statusAnimationLabel.setIcon(busyIcons[0]);
                        busyIconIndex = 0;
                        busyIconTimer.start();
                    }
                    progressBar.setVisible(true);
                    progressBar.setIndeterminate(true);
                } else if ("done".equals(propertyName)) {
                    busyIconTimer.stop();
                    statusAnimationLabel.setIcon(idleIcon);
                    progressBar.setVisible(false);
                    progressBar.setValue(0);
                } else if ("message".equals(propertyName)) {
                    String text = (String) (evt.getNewValue());
                    statusMessageLabel.setText((text == null) ? "" : text);
                    messageTimer.restart();
                } else if ("progress".equals(propertyName)) {
                    int value = (Integer) (evt.getNewValue());
                    progressBar.setVisible(true);
                    progressBar.setIndeterminate(false);
                    progressBar.setValue(value);
                }
            }
        });
    }

    @Action
    public void showAboutBox() {
        if (aboutBox == null) {
            JFrame mainFrame = HashGuiApp.getApplication().getMainFrame();
            aboutBox = new HashGuiAboutBox(mainFrame);
            aboutBox.setLocationRelativeTo(mainFrame);
        }
        HashGuiApp.getApplication().show(aboutBox);
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        mainPanel = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        jScrollPane2 = new javax.swing.JScrollPane();
        jTextArea2 = new javax.swing.JTextArea();
        jScrollPane3 = new javax.swing.JScrollPane();
        jTextArea3 = new javax.swing.JTextArea();
        jScrollBar1 = new javax.swing.JScrollBar();
        jScrollBar2 = new javax.swing.JScrollBar();
        jScrollBar3 = new javax.swing.JScrollBar();
        jScrollPane4 = new javax.swing.JScrollPane();
        jTextArea4 = new javax.swing.JTextArea();
        jScrollBar4 = new javax.swing.JScrollBar();
        jButton1 = new javax.swing.JButton();
        menuBar = new javax.swing.JMenuBar();
        javax.swing.JMenu fileMenu = new javax.swing.JMenu();
        javax.swing.JMenuItem exitMenuItem = new javax.swing.JMenuItem();
        javax.swing.JMenu helpMenu = new javax.swing.JMenu();
        javax.swing.JMenuItem aboutMenuItem = new javax.swing.JMenuItem();
        statusPanel = new javax.swing.JPanel();
        javax.swing.JSeparator statusPanelSeparator = new javax.swing.JSeparator();
        statusMessageLabel = new javax.swing.JLabel();
        statusAnimationLabel = new javax.swing.JLabel();
        progressBar = new javax.swing.JProgressBar();
        jScrollPane5 = new javax.swing.JScrollPane();
        jList1 = new javax.swing.JList();
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenu1 = new javax.swing.JMenu();
        jMenu2 = new javax.swing.JMenu();
        jPopupMenu1 = new javax.swing.JPopupMenu();
        jPopupMenu2 = new javax.swing.JPopupMenu();
        jPopupMenu3 = new javax.swing.JPopupMenu();

        mainPanel.setName("mainPanel"); // NOI18N

        jScrollPane1.setName("jScrollPane1"); // NOI18N

        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jTextArea1.setName("jTextArea1"); // NOI18N
        jScrollPane1.setViewportView(jTextArea1);

        jScrollPane2.setName("jScrollPane2"); // NOI18N

        jTextArea2.setColumns(20);
        jTextArea2.setRows(5);
        jTextArea2.setName("jTextArea2"); // NOI18N
        jScrollPane2.setViewportView(jTextArea2);

        jScrollPane3.setName("jScrollPane3"); // NOI18N

        jTextArea3.setColumns(20);
        jTextArea3.setRows(5);
        jTextArea3.setName("jTextArea3"); // NOI18N
        jScrollPane3.setViewportView(jTextArea3);

        jScrollBar1.setName("jScrollBar1"); // NOI18N

        jScrollBar2.setName("jScrollBar2"); // NOI18N

        jScrollBar3.setName("jScrollBar3"); // NOI18N

        jScrollPane4.setName("jScrollPane4"); // NOI18N

        jTextArea4.setColumns(20);
        jTextArea4.setRows(5);
        jTextArea4.setName("jTextArea4"); // NOI18N
        jScrollPane4.setViewportView(jTextArea4);

        jScrollBar4.setName("jScrollBar4"); // NOI18N

        org.jdesktop.application.ResourceMap resourceMap = org.jdesktop.application.Application.getInstance(hashgui.HashGuiApp.class).getContext().getResourceMap(HashGuiView.class);
        jButton1.setText(resourceMap.getString("jButton1.text")); // NOI18N
        jButton1.setName("jButton1"); // NOI18N
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout mainPanelLayout = new javax.swing.GroupLayout(mainPanel);
        mainPanel.setLayout(mainPanelLayout);
        mainPanelLayout.setHorizontalGroup(
            mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(mainPanelLayout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollBar1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(31, 31, 31)
                .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollBar2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(57, 57, 57)
                .addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollBar3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(55, 55, 55)
                .addComponent(jScrollPane4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollBar4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 244, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(76, Short.MAX_VALUE))
        );
        mainPanelLayout.setVerticalGroup(
            mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(mainPanelLayout.createSequentialGroup()
                .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, mainPanelLayout.createSequentialGroup()
                        .addGap(14, 14, 14)
                        .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                            .addComponent(jScrollPane4, javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jScrollBar3, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(jScrollBar2, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(jScrollBar1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(jScrollPane3, javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jScrollPane2, javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 305, Short.MAX_VALUE)))
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, mainPanelLayout.createSequentialGroup()
                        .addContainerGap()
                        .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jScrollBar4, javax.swing.GroupLayout.DEFAULT_SIZE, 308, Short.MAX_VALUE))))
                .addGap(130, 130, 130))
        );

        menuBar.setName("menuBar"); // NOI18N

        fileMenu.setText(resourceMap.getString("fileMenu.text")); // NOI18N
        fileMenu.setName("fileMenu"); // NOI18N

        javax.swing.ActionMap actionMap = org.jdesktop.application.Application.getInstance(hashgui.HashGuiApp.class).getContext().getActionMap(HashGuiView.class, this);
        exitMenuItem.setAction(actionMap.get("quit")); // NOI18N
        exitMenuItem.setName("exitMenuItem"); // NOI18N
        fileMenu.add(exitMenuItem);

        menuBar.add(fileMenu);

        helpMenu.setText(resourceMap.getString("helpMenu.text")); // NOI18N
        helpMenu.setName("helpMenu"); // NOI18N

        aboutMenuItem.setAction(actionMap.get("showAboutBox")); // NOI18N
        aboutMenuItem.setName("aboutMenuItem"); // NOI18N
        helpMenu.add(aboutMenuItem);

        menuBar.add(helpMenu);

        statusPanel.setName("statusPanel"); // NOI18N

        statusPanelSeparator.setName("statusPanelSeparator"); // NOI18N

        statusMessageLabel.setName("statusMessageLabel"); // NOI18N

        statusAnimationLabel.setHorizontalAlignment(javax.swing.SwingConstants.LEFT);
        statusAnimationLabel.setName("statusAnimationLabel"); // NOI18N

        progressBar.setName("progressBar"); // NOI18N

        javax.swing.GroupLayout statusPanelLayout = new javax.swing.GroupLayout(statusPanel);
        statusPanel.setLayout(statusPanelLayout);
        statusPanelLayout.setHorizontalGroup(
            statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(statusPanelSeparator, javax.swing.GroupLayout.DEFAULT_SIZE, 1247, Short.MAX_VALUE)
            .addGroup(statusPanelLayout.createSequentialGroup()
                .addContainerGap()
                .addComponent(statusMessageLabel)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 1077, Short.MAX_VALUE)
                .addComponent(progressBar, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(statusAnimationLabel)
                .addContainerGap())
        );
        statusPanelLayout.setVerticalGroup(
            statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(statusPanelLayout.createSequentialGroup()
                .addComponent(statusPanelSeparator, javax.swing.GroupLayout.PREFERRED_SIZE, 2, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(statusMessageLabel)
                    .addComponent(statusAnimationLabel)
                    .addComponent(progressBar, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(3, 3, 3))
        );

        jScrollPane5.setName("jScrollPane5"); // NOI18N

        jList1.setModel(new javax.swing.AbstractListModel() {
            String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
            public int getSize() { return strings.length; }
            public Object getElementAt(int i) { return strings[i]; }
        });
        jList1.setName("jList1"); // NOI18N
        jScrollPane5.setViewportView(jList1);

        jMenuBar1.setName("jMenuBar1"); // NOI18N

        jMenu1.setText(resourceMap.getString("jMenu1.text")); // NOI18N
        jMenu1.setName("jMenu1"); // NOI18N
        jMenuBar1.add(jMenu1);

        jMenu2.setText(resourceMap.getString("jMenu2.text")); // NOI18N
        jMenu2.setName("jMenu2"); // NOI18N
        jMenuBar1.add(jMenu2);

        jPopupMenu1.setName("jPopupMenu1"); // NOI18N

        jPopupMenu2.setName("jPopupMenu2"); // NOI18N

        jPopupMenu3.setName("jPopupMenu3"); // NOI18N

        setComponent(mainPanel);
        setMenuBar(menuBar);
        setStatusBar(statusPanel);
    }// </editor-fold>                        

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
// TODO add your handling code her
    if (evt.getSource() == jButton1) {
        Hash.createHash();
        //Get text From TextAreas
        getText(jTextArea1, Hash.Hash1);
        getText(jTextArea2, Hash.Hash2);
        getText(jTextArea3, Hash.Hash2);
        //Write to textField 4
        hashToTextfield();

    }

}                                        
    //Get Textlines form JTextARea
    private void getText(JTextArea area, HashSet m) {
        String text = area.getText();
        int totalLines = area.getLineCount();
        for (int i = 0; i < totalLines; i++) {
            try {
                int start = area.getLineStartOffset(i);
                int end = area.getLineEndOffset(i);
                String line = text.substring(start, end);
                if(line.isEmpty() == false){
                    Hash.fillHash(line, m);
                    
                }
                
            } catch (BadLocationException ex) {
                Logger.getLogger(HashGuiView.class.getName()).log(Level.SEVERE, null, ex);
            }

        }
    }
    
    //Write Content of HashFields to TextArea
    private void hashToTextfield() {

        HashSet h1 = new HashSet();
        h1 = Hash.Intersect(Hash.Hash1, Hash.Hash2, Hash.Hash3);
        //System.out.print(val);
      
        Iterator itr = Hash.Hash1.iterator();
        while (itr.hasNext()) {
            jTextArea4.append(itr.next().toString());
        }
     

        }



    
    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JList jList1;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenu jMenu2;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JPopupMenu jPopupMenu1;
    private javax.swing.JPopupMenu jPopupMenu2;
    private javax.swing.JPopupMenu jPopupMenu3;
    private javax.swing.JScrollBar jScrollBar1;
    private javax.swing.JScrollBar jScrollBar2;
    private javax.swing.JScrollBar jScrollBar3;
    private javax.swing.JScrollBar jScrollBar4;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JScrollPane jScrollPane3;
    private javax.swing.JScrollPane jScrollPane4;
    private javax.swing.JScrollPane jScrollPane5;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JTextArea jTextArea2;
    private javax.swing.JTextArea jTextArea3;
    private javax.swing.JTextArea jTextArea4;
    private javax.swing.JPanel mainPanel;
    private javax.swing.JMenuBar menuBar;
    private javax.swing.JProgressBar progressBar;
    private javax.swing.JLabel statusAnimationLabel;
    private javax.swing.JLabel statusMessageLabel;
    private javax.swing.JPanel statusPanel;
    // End of variables declaration                   
    private final Timer messageTimer;
    private final Timer busyIconTimer;
    private final Icon idleIcon;
    private final Icon[] busyIcons = new Icon[15];
    private int busyIconIndex = 0;
    private JDialog aboutBox;
}

Und hier die klasse zum erzeugen der HashSets und der Schnittmengenberechnung.

Java: 
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package hashgui;

import java.util.*;

/**
 *
 * @author jazz
 */
public class Hash {
    public static HashSet Hash1, Hash2, Hash3;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        
    }
    //Create 3 HashFields
    public static void createHash(){
        Hash1 = new HashSet();
        Hash2= new HashSet();
        Hash3 = new HashSet();
     
        
    }
    //Fill Hashset with String values.
    public static void fillHash(String value, HashSet m){
        m.add(value);
       
        
    }
    //Calculate intersection between Three Hashsets.
    public static HashSet Intersect(HashSet m1, HashSet m2, HashSet m3) {
        HashSet Tempintersection = new HashSet(m1);
        Tempintersection.retainAll(m2);
        HashSet intersection = new HashSet(Tempintersection);
        intersection.retainAll(m3);
         
        return intersection;
            
        }
            
          
    }
 
N

nillehammer

Gast
In der Methode jButton1ActionPerformed initialisierst Du die drei HashSets jedes Mal neu. Ich habe mir den Rest des GUI-Codes nicht angeschaut, aber wenn ich richtig liege, hast Du so bei jedem Klick auf den Button immer drei neue HashSets mit jedes Mal jeweils nur einem Wert. Außerdem machst du in der Methode einen Object-Vergleich mit ==. Das solltest du auch dringend auf equals ändern.
 
Zuletzt bearbeitet von einem Moderator:
T

Tilli

Mitglied
Danke erstmal für die tipps. Ich hab das programm weitgehenst angepasst und die funktionen einzeln durchgetestet.

Scheinbar läuft etwas mit der schnittmengenberechnung "retainAll" in der methode Intersect der klasse Hash falsch. Wenn ich nämlich probiere die "union" von allen 3 sets auszugeben funktioniert alles einwandfrei.
 
M

Marco13

Top Contributor
~500 Zeilen Code, ... retainAll macht das, was in der Doku steht, davon kannst du ausgehen. Also Debugger starten oder
System.out.println("Start mit "+m1);
System.out.println("und "+m2);
System.out.println("und "+m3);
HashSet Tempintersection = new HashSet(m1);
Tempintersection.retainAll(m2);
System.out.println("Übrig jetzt "+Tempintersection);
...
 
T

Tilli

Mitglied
so, ich habs gelöst. Es lag im grunde an der funktion die den text aus den JTextareas holt. Diese habe ich ersetzt durch:

Java: 
 private void getText(JTextArea area, HashSet m) {
        m.addAll(Arrays.asList(area.getText().split("\n")));

Jetzt funktioniert alles einwandfrei :)
 
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