ForEach zum path zeichnen

und der Funktion lese Punkte, speichere Punkte

.gitignore

@@ -1 +1,2 @@
 /build/
+/dist/

src/mvcgrafik/Start.java

@@ -7,6 +7,7 @@ package mvcgrafik;
 
 import javax.swing.JOptionPane;
 import javax.swing.UIManager;
+import mvcgrafik.controller.CommandController;
 import mvcgrafik.controller.GrafikController;
 import mvcgrafik.model.GrafikModel;
 import mvcgrafik.view.GrafikFrame;
@@ -25,7 +26,10 @@ public class Start
     GrafikView view = frm.getgZeichenflaeche();
     view.setModel(model);
     GrafikController controller = new GrafikController(view, model);
+    CommandController controller_commands = new CommandController(frm,view, model);
     controller.registerEvents();
+    controller_commands.registerEvents();
+    controller_commands.registerCommands();
     frm.setVisible(true);
   }
 

src/mvcgrafik/controller/CommandController.java

@@ -0,0 +1,66 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+package mvcgrafik.controller;
+
+import java.awt.Component;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import mvcgrafik.controller.commands.CommandInvoker;
+import mvcgrafik.controller.commands.OpenCommand;
+import mvcgrafik.controller.commands.PrintCommand;
+import mvcgrafik.controller.commands.SaveCommand;
+import mvcgrafik.model.GrafikModel;
+import mvcgrafik.view.GrafikFrame;
+import mvcgrafik.view.GrafikView;
+
+/**
+ *
+ * @author ahren
+ */
+public class CommandController implements ActionListener
+{
+  private GrafikFrame frame;
+  private GrafikView view;
+  private GrafikModel model;
+  private CommandInvoker invoker;
+    
+  public CommandController(GrafikFrame frame,GrafikView view, GrafikModel model)
+  {
+    this.frame = frame;
+    this.view = view;
+    this.model = model;
+    this.invoker = new CommandInvoker();
+  }
+
+  public void registerEvents()
+  {
+    frame.getBtnFileOpen().addActionListener(this);
+    frame.getBtnFileSave().addActionListener(this);
+    frame.getBtnPrint().addActionListener(this);
+
+  }
+  
+  public void registerCommands()
+  {
+    invoker.addCommand(frame.getBtnFileOpen(), new OpenCommand(frame, model));
+    invoker.addCommand(frame.getBtnFileSave(), new SaveCommand(frame,model));
+    invoker.addCommand(frame.getBtnPrint(), new PrintCommand(view,model));  
+
+  }
+  
+    /**
+     * Ausführen des jeweiligen Kommandos
+     * @param e Referenz auf das Event
+     */
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        Component key = (Component)e.getSource();
+        invoker.executeCommand(key);
+        if(key == frame.getBtnFileOpen()){
+          invoker.deleteStack();
+        }
+    }
+}

src/mvcgrafik/controller/GrafikController.java

@@ -50,9 +50,5 @@ public class GrafikController extends MouseAdapter implements MouseMotionListene
   public void mouseReleased(MouseEvent evt)
   {
       model.endShape();
-    if (evt.getButton() == MouseEvent.BUTTON3)
-    {
-      view.doPrint();
-    }
   }
 }

src/mvcgrafik/controller/commands/CommandInterface.java

@@ -0,0 +1,17 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Interface.java to edit this template
+ */
+package mvcgrafik.controller.commands;
+
+/**
+ *
+ * @author ahren
+ */
+public interface CommandInterface
+{
+  public void execute();
+  public void undo();
+  public void redo();
+  public boolean isUndoable();
+}

src/mvcgrafik/controller/commands/CommandInvoker.java

@@ -0,0 +1,73 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+package mvcgrafik.controller.commands;
+
+import java.awt.Component;
+import java.util.HashMap;
+import java.util.Stack;
+
+/**
+ * Dient zur Realisierung des Polymorphismus
+ * für das COmmand-Design-Pattern
+ * Die Commands werden in einer HashMap gespeichert
+ * @author ahren
+ * @see CommandInterface
+ */
+public class CommandInvoker {
+    
+    private HashMap<Component, CommandInterface> commands;
+    private Stack <CommandInterface> undoStack;
+    
+    public CommandInvoker(){
+        commands = new HashMap<>();
+        undoStack = new Stack();  
+    }
+    
+    /**
+    * Fügt ein Kommando zur Kommando-"Datenbank" = HashMap hinzu
+    * @param key Quelle des Events
+    * @param value Referenz auf das zugehörige Kommando-Objekt
+    */
+    public void addCommand(Component key, CommandInterface value){
+        commands.put(key, value);
+    }
+    
+    /**
+    * Führt Kommando der Eventquelle "key" aus und legt die Referenz
+    * des Kommando in den Undo-Stack
+    * @param key Referenz auf die Eventquelle
+    */
+    public void executeCommand(Component key){
+      CommandInterface command = commands.get(key);
+      command.execute();
+      if (command.isUndoable())
+      {
+        undoStack.push(command);
+      }
+    }
+    /**
+    * Falls der Stack Elemente enthält, wird das oberste Element geholt
+    * und die Methode "undo" des Commands aufgerufen
+    */
+    public void undoCommand()
+    {
+      if (!undoStack.isEmpty())
+      {
+        undoStack.pop().undo();
+      }
+    }
+
+    /**
+     * Löscht bei Öffnen einer neuen Datei den Stack
+     */
+    public void deleteStack()
+    {
+      while(!undoStack.isEmpty())
+        undoStack.pop();
+    }
+    
+}
+

src/mvcgrafik/controller/commands/OpenCommand.java

@@ -0,0 +1,78 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+package mvcgrafik.controller.commands;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javax.swing.JFileChooser;
+import mvcgrafik.model.GrafikModel;
+import mvcgrafik.view.GrafikFrame;
+
+
+/**
+ *
+ * @author ahren
+ */
+public class OpenCommand implements CommandInterface
+{
+  private GrafikFrame view;
+  private GrafikModel model;
+  
+  public OpenCommand(GrafikFrame view, GrafikModel model)
+  {
+    this.view = view;
+    this.model = model;
+  }
+
+  @Override
+  public void execute() {
+    JFileChooser fc = view.getFcFileChooser();
+    String lastDirectory = model.getPref();
+    if (lastDirectory != null) {
+        fc.setCurrentDirectory(new File(lastDirectory));
+    }
+    int choice = fc.showOpenDialog(view);
+    if (choice == JFileChooser.APPROVE_OPTION)
+    {
+      File selectedFile = fc.getSelectedFile();
+      String filename = selectedFile.getAbsolutePath();
+      model.putPref("lastDirectory", selectedFile.getParent());
+
+      try
+      {
+        model.lesePunkte(filename);
+      }
+      catch (FileNotFoundException ex)
+      {
+        Logger.getLogger(OpenCommand.class.getName()).log(Level.SEVERE, null, ex);
+      }
+      catch (ClassNotFoundException | IOException ex)
+      {
+        Logger.getLogger(OpenCommand.class.getName()).log(Level.SEVERE, null, ex);
+      }
+      view.getgZeichenflaeche().repaint();
+    }
+  }
+
+  @Override
+  public void undo() {
+      throw new UnsupportedOperationException("Not undoable."); // Generated from nbfs://nbhost/SystemFileSystem/Templates/Classes/Code/GeneratedMethodBody
+  }
+
+  @Override
+  public void redo() {
+      throw new UnsupportedOperationException("Not redoable."); // Generated from nbfs://nbhost/SystemFileSystem/Templates/Classes/Code/GeneratedMethodBody
+  }
+
+  @Override
+  public boolean isUndoable()
+  {
+    return false;
+  }
+}

src/mvcgrafik/controller/commands/PrintCommand.java

@@ -0,0 +1,57 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+package mvcgrafik.controller.commands;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javax.swing.JFileChooser;
+import mvcgrafik.model.GrafikModel;
+import mvcgrafik.view.GrafikFrame;
+import mvcgrafik.view.GrafikView;
+
+/**
+ *
+ * @author ahren
+ */
+public class PrintCommand implements CommandInterface
+{
+   private GrafikView view;
+    private GrafikModel model;
+    
+    public PrintCommand(GrafikView view, GrafikModel model){
+        this.view = view;
+        this.model = model;
+    }
+    
+  /**
+   * Aufrufen des File Choosers in zuletzt verwendeten Ordner, versuchen die 
+   * Tabellendatei zu speichern
+   */
+    @Override
+    public void execute() {
+        this.view.doPrint();
+    }
+    
+
+    @Override
+    public void undo() {
+        throw new UnsupportedOperationException("Not undoable."); // Generated from nbfs://nbhost/SystemFileSystem/Templates/Classes/Code/GeneratedMethodBody
+    }
+
+    @Override
+    public void redo() {
+        throw new UnsupportedOperationException("Not redoable."); // Generated from nbfs://nbhost/SystemFileSystem/Templates/Classes/Code/GeneratedMethodBody
+    }
+
+    @Override
+    public boolean isUndoable() {
+        return false;
+    }
+    
+}

src/mvcgrafik/controller/commands/SaveCommand.java

@@ -0,0 +1,80 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+package mvcgrafik.controller.commands;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javax.swing.JFileChooser;
+import mvcgrafik.model.GrafikModel;
+import mvcgrafik.view.GrafikFrame;
+
+/**
+ *
+ * @author ahren
+ */
+public class SaveCommand implements CommandInterface
+{
+   private GrafikFrame view;
+    private GrafikModel model;
+    
+    public SaveCommand(GrafikFrame view, GrafikModel model){
+        this.view = view;
+        this.model = model;
+    }
+    
+  /**
+   * Aufrufen des File Choosers in zuletzt verwendeten Ordner, versuchen die 
+   * Tabellendatei zu speichern
+   */
+    @Override
+    public void execute() {
+      JFileChooser fc = view.getFcFileChooser();
+      String lastDirectory = model.getPref();
+      if (lastDirectory != null) {
+          fc.setCurrentDirectory(new File(lastDirectory));
+      }
+      int choice = fc.showSaveDialog(view);
+      if (choice == JFileChooser.APPROVE_OPTION)
+      {
+        File selectedFile = fc.getSelectedFile();
+        String filename = selectedFile.getAbsolutePath();
+        model.putPref("lastDirectory", selectedFile.getParent());
+        
+        try
+        {
+          model.speicherePunkte(filename);
+        }
+        catch (FileNotFoundException ex)
+        {
+          Logger.getLogger(SaveCommand.class.getName()).log(Level.SEVERE, null, ex);
+        }
+        catch (IOException ex)
+        {
+          Logger.getLogger(SaveCommand.class.getName()).log(Level.SEVERE, null, ex);
+        }
+      }
+    }
+    
+
+    @Override
+    public void undo() {
+        throw new UnsupportedOperationException("Not undoable."); // Generated from nbfs://nbhost/SystemFileSystem/Templates/Classes/Code/GeneratedMethodBody
+    }
+
+    @Override
+    public void redo() {
+        throw new UnsupportedOperationException("Not redoable."); // Generated from nbfs://nbhost/SystemFileSystem/Templates/Classes/Code/GeneratedMethodBody
+    }
+
+    @Override
+    public boolean isUndoable() {
+        return false;
+    }
+    
+}

src/mvcgrafik/model/Figur.java

@@ -0,0 +1,39 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+package mvcgrafik.model;
+
+import java.awt.Point;
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ *
+ * @author ahren
+ */
+public class Figur implements Serializable
+{
+  private ArrayList<Point> punkte;
+  
+  public Figur(){
+        punkte = new ArrayList<>();
+  }
+
+  public void addPoint(Point p){
+    punkte.add(p);
+  }
+  
+  public List<Point> getPunkte()
+  {
+    return Collections.unmodifiableList(punkte);
+  }
+  
+  public void clear(){
+    punkte.clear();
+  }
+  
+}

src/mvcgrafik/model/GrafikModel.java

@@ -17,33 +17,37 @@ import java.io.ObjectOutputStream;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
-
+import java.util.logging.Logger;
+import java.util.prefs.Preferences;
+import mvcgrafik.util.OhmLogger;
 /**
  *
  * @author le
  */
 public class GrafikModel
 {
-  private ArrayList<Point> punkte;
-  private ArrayList<ArrayList> figuren;
+  private Figur aktuelleFigur;
+  private ArrayList<Figur> figuren;
+  private Preferences pref;
+ private static Logger lg = OhmLogger.getLogger();
   
   public GrafikModel()
   {
-    punkte = new ArrayList<>();
+    aktuelleFigur = new Figur();
     figuren = new ArrayList<>();
   }
   
   public void addPoint(Point p)
   {
-    punkte.add(p);
+    aktuelleFigur.addPoint(p);
   }
 
   public List<Point> getPunkte()
   {
-    return Collections.unmodifiableList(punkte);
+    return aktuelleFigur.getPunkte();
   }
   
-  public List<ArrayList> getFiguren(){
+  public List<Figur> getFiguren(){
     return Collections.unmodifiableList(figuren);
   }
   
@@ -62,7 +66,7 @@ public class GrafikModel
     BufferedOutputStream bos = new BufferedOutputStream(fos);
     //Serialisierung
     ObjectOutputStream oos = new ObjectOutputStream(bos);
-    oos.writeObject(punkte);
+    oos.writeObject(figuren);
     oos.flush(); // Puffer
     oos.close();
   }
@@ -83,16 +87,35 @@ public class GrafikModel
     //eleganter
     if (daten instanceof ArrayList liste)
     {
-      punkte = liste;
+      figuren = liste;
     }  
  
   }  
 
     public void endShape() {
-        figuren.add(new ArrayList<Point>(punkte));
-        punkte.clear();
+        figuren.add(aktuelleFigur);
+        aktuelleFigur = new Figur();
     }
   
+    /**
+   * Bestimmt die Adresse des zuletzt besuchten Ordners
+   * @return letzter Ordner
+   */
+  public String getPref()
+  {
+        pref = Preferences.userNodeForPackage(getClass());
+        return pref.get("lastDirectory", null);
+  }
 
-  
+  /**
+   * Setzt die Preferenz zu dem zuletzt besuchten Ordner
+   * @param lastDirectory Bezeichner "lastDirectory"
+   * @param lastAdress Adresse des zuletzt besuchten Ordners
+   */
+  public void putPref(String lastDirectory, String lastAdress)
+  {
+    pref.put(lastDirectory, lastAdress);
+  }
 }
+
+

src/mvcgrafik/view/GrafikFrame.form

@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 
 <Form version="1.3" maxVersion="1.9" type="org.netbeans.modules.form.forminfo.JFrameFormInfo">
+  <NonVisualComponents>
+    <Component class="javax.swing.JFileChooser" name="FcFileChooser">
+    </Component>
+  </NonVisualComponents>
   <Properties>
     <Property name="defaultCloseOperation" type="int" value="3"/>
   </Properties>
@@ -35,5 +39,51 @@
         <Property name="useNullLayout" type="boolean" value="true"/>
       </Layout>
     </Container>
+    <Container class="javax.swing.JToolBar" name="jToolBar1">
+      <Properties>
+        <Property name="rollover" type="boolean" value="true"/>
+      </Properties>
+      <Constraints>
+        <Constraint layoutClass="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout" value="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout$BorderConstraintsDescription">
+          <BorderConstraints direction="First"/>
+        </Constraint>
+      </Constraints>
+
+      <Layout class="org.netbeans.modules.form.compat2.layouts.DesignBoxLayout"/>
+      <SubComponents>
+        <Component class="javax.swing.JButton" name="btnFileOpen">
+          <Properties>
+            <Property name="icon" type="javax.swing.Icon" editor="org.netbeans.modules.form.editors2.IconEditor">
+              <Image iconType="3" name="/mvcgrafik/view/Open24.gif"/>
+            </Property>
+            <Property name="toolTipText" type="java.lang.String" value="Open File"/>
+            <Property name="focusable" type="boolean" value="false"/>
+            <Property name="horizontalTextPosition" type="int" value="0"/>
+            <Property name="verticalTextPosition" type="int" value="3"/>
+          </Properties>
+        </Component>
+        <Component class="javax.swing.JButton" name="btnFileSave">
+          <Properties>
+            <Property name="icon" type="javax.swing.Icon" editor="org.netbeans.modules.form.editors2.IconEditor">
+              <Image iconType="3" name="/mvcgrafik/view/Save24.gif"/>
+            </Property>
+            <Property name="toolTipText" type="java.lang.String" value="Safe File"/>
+            <Property name="horizontalTextPosition" type="int" value="0"/>
+            <Property name="verticalTextPosition" type="int" value="3"/>
+          </Properties>
+        </Component>
+        <Component class="javax.swing.JButton" name="btnPrint">
+          <Properties>
+            <Property name="icon" type="javax.swing.Icon" editor="org.netbeans.modules.form.editors2.IconEditor">
+              <Image iconType="3" name="/mvcgrafik/view/Print24.gif"/>
+            </Property>
+            <Property name="toolTipText" type="java.lang.String" value="Print File"/>
+            <Property name="focusable" type="boolean" value="false"/>
+            <Property name="horizontalTextPosition" type="int" value="0"/>
+            <Property name="verticalTextPosition" type="int" value="3"/>
+          </Properties>
+        </Component>
+      </SubComponents>
+    </Container>
   </SubComponents>
 </Form>

src/mvcgrafik/view/GrafikFrame.java

@@ -10,6 +10,30 @@ package mvcgrafik.view;
  */
 public class GrafikFrame extends javax.swing.JFrame
 {
+
+  /**
+   * @return the FcFileChooser
+   */
+  public javax.swing.JFileChooser getFcFileChooser()
+  {
+    return FcFileChooser;
+  }
+
+  /**
+   * @return the btnFileOpen
+   */
+  public javax.swing.JButton getBtnFileOpen()
+  {
+    return btnFileOpen;
+  }
+
+  /**
+   * @return the btnFileSave
+   */
+  public javax.swing.JButton getBtnFileSave()
+  {
+    return btnFileSave;
+  }
   /**
    * @return the gZeichenflaeche
    */
@@ -33,14 +57,42 @@ public class GrafikFrame extends javax.swing.JFrame
    */
   @SuppressWarnings("unchecked")
     // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
-  private void initComponents()
-  {
+    private void initComponents() {
 
+        FcFileChooser = new javax.swing.JFileChooser();
         gZeichenflaeche = new mvcgrafik.view.GrafikView();
+        jToolBar1 = new javax.swing.JToolBar();
+        btnFileOpen = new javax.swing.JButton();
+        btnFileSave = new javax.swing.JButton();
+        btnPrint = new javax.swing.JButton();
 
         setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
         getContentPane().add(gZeichenflaeche, java.awt.BorderLayout.CENTER);
 
+        jToolBar1.setRollover(true);
+
+        btnFileOpen.setIcon(new javax.swing.ImageIcon(getClass().getResource("/mvcgrafik/view/Open24.gif"))); // NOI18N
+        btnFileOpen.setToolTipText("Open File");
+        btnFileOpen.setFocusable(false);
+        btnFileOpen.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
+        btnFileOpen.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
+        jToolBar1.add(btnFileOpen);
+
+        btnFileSave.setIcon(new javax.swing.ImageIcon(getClass().getResource("/mvcgrafik/view/Save24.gif"))); // NOI18N
+        btnFileSave.setToolTipText("Safe File");
+        btnFileSave.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
+        btnFileSave.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
+        jToolBar1.add(btnFileSave);
+
+        btnPrint.setIcon(new javax.swing.ImageIcon(getClass().getResource("/mvcgrafik/view/Print24.gif"))); // NOI18N
+        btnPrint.setToolTipText("Print File");
+        btnPrint.setFocusable(false);
+        btnPrint.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
+        btnPrint.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
+        jToolBar1.add(btnPrint);
+
+        getContentPane().add(jToolBar1, java.awt.BorderLayout.PAGE_START);
+
         setSize(new java.awt.Dimension(540, 412));
         setLocationRelativeTo(null);
     }// </editor-fold>//GEN-END:initComponents
@@ -95,6 +147,18 @@ public class GrafikFrame extends javax.swing.JFrame
   }
 
     // Variables declaration - do not modify//GEN-BEGIN:variables
+    private javax.swing.JFileChooser FcFileChooser;
+    private javax.swing.JButton btnFileOpen;
+    private javax.swing.JButton btnFileSave;
+    private javax.swing.JButton btnPrint;
     private mvcgrafik.view.GrafikView gZeichenflaeche;
+    private javax.swing.JToolBar jToolBar1;
     // End of variables declaration//GEN-END:variables
+
+    /**
+     * @return the btnPrint
+     */
+    public javax.swing.JButton getBtnPrint() {
+        return btnPrint;
+    }
 }

src/mvcgrafik/view/GrafikView.java

@@ -38,6 +38,9 @@ public class GrafikView extends JComponent implements Printable
   private Line2D.Float line;
   private GrafikModel model;
   
+  private Point from = null;
+  private Point to = null;
+  
   public GrafikView()
   {
     pixel = new Rectangle2D.Float();
@@ -70,6 +73,7 @@ public class GrafikView extends JComponent implements Printable
    * Jedes mal wenn die Maus los gelassen wird, wird dder aktuelle Pfad gespeichert
    * @param g 
    */
+  @Override
   public void paintComponent(Graphics g)
   {
     if (model == null) return;
@@ -79,22 +83,24 @@ public class GrafikView extends JComponent implements Printable
     
     model.getFiguren().forEach(figuren->
     {
-        drawPath(figuren,g2);
+        drawPath(figuren.getPunkte(),g2);
     });
- 
   }
   
   public void drawPath(List<Point> path, Graphics2D g2){     
+    from = path.getFirst();
+    to = null;
     
-    for(int i=0; i < path.size()-1; i++)
+     path.forEach(point->
      {
-        Point from = path.get(i);
-        Point to = path.get(i+1);
-        
+         to = point;
          line.setLine(from,to);
          g2.draw(line);
+         from = to;
+           
+     });
   }
-  }
+  
   
   public void doPrint()
   {