betreutProg10_Code

WS 2011/2012
SS 2011
Fakultät für Angewandte Informatik
Lehrprofessur für Informatik
Programmierung
verteilter Systeme
16.01.2012
06.07.2011
Prof.
LorenzBauer
Prof.Dr.
Dr.Robert
Bernhard
Code zum Betreuten
Programmieren
vom 06.07.2011,
Blatt 10
Code zum betreuten
Programmieren,
Blatt 10
Serialisierung und GUI
1 Die Klasse Field
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import
import
import
import
import
import
import
import
java.awt.Button;
java.awt.Panel;
java.awt.GridLayout;
java.awt.event.ActionEvent;
java.awt.event.ActionListener;
java.awt.Color;
java.io.Serializable;
java.util.ArrayList;
public class Field extends Panel implements ActionListener, Serializable
{
private static final long serialVersionUID = 5430739654048761030L;
private int clickedButtons;
private ArrayList<String> clicked;
private ArrayList<Button> numbers;
public Field()
{
super();
numbers = new ArrayList<Button>(49);
for(int i=1;i<=49;i++)
{
numbers.add(new Button(""+i));
numbers.get(i-1).addActionListener(this);
numbers.get(i-1).setBackground(Color.WHITE);
add(numbers.get(i-1));
}
clicked = new ArrayList<String>(6);
clickedButtons=0;
setLayout(new GridLayout(7,7));
setBackground(Color.RED);
}
public void actionPerformed(ActionEvent e)
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73 }
{
Button b = (Button)e.getSource();
if(b.getBackground()==Color.WHITE && clickedButtons<6)
{
b.setBackground(Color.MAGENTA);
clicked.add(b.getLabel());
clickedButtons++;
}
else if(b.getBackground()==Color.MAGENTA)
{
b.setBackground(Color.WHITE);
clicked.remove(b.getLabel());
clickedButtons--;
}
}
public void redo()
{
for(int i=0;i<numbers.size();i++)
{
numbers.get(i).setBackground(Color.WHITE);
clicked.clear();
}
clickedButtons=0;
}
public ArrayList<String> getClicked()
{
return clicked;
}
public boolean isOk()
{
if(clickedButtons==0 || clickedButtons==6)
return true;
else
return false;
}
2 Die Klasse LotteryTicker
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import
import
import
import
import
import
import
import
import
import
import
java.awt.BorderLayout;
java.awt.Button;
java.awt.Color;
java.awt.FileDialog;
java.awt.Frame;
java.awt.GridLayout;
java.awt.Label;
java.awt.Panel;
java.awt.event.ActionEvent;
java.awt.event.ActionListener;
java.awt.event.WindowAdapter;
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import
import
import
import
import
import
import
java.awt.event.WindowEvent;
java.io.FileInputStream;
java.io.FileOutputStream;
java.io.ObjectInputStream;
java.io.ObjectOutputStream;
java.util.ArrayList;
java.util.Iterator;
public class LotteryTicket extends Frame implements ActionListener
{
private Label msg;
private ArrayList<Field> lottoFields;
private Panel fields;
private static final int SAVE = 0;
private static final int LOAD = 1;
private int TYPE;
private Warning warning=null;
public LotteryTicket()
{
super("Lottoschein");
setBackground(Color.RED);
lottoFields = new ArrayList<Field>();
fields = new Panel(new GridLayout(2,6,2,2));
fields.setBackground(Color.RED);
for(int i=0;i<12;i++)
{
lottoFields.add(new Field());
fields.add(lottoFields.get(i));
}
Panel buttons = new Panel();
buttons.setBackground(Color.WHITE);
Button speichern = new Button("Speichern");
speichern.addActionListener(this);
buttons.add(speichern);
Button laden = new Button("Laden");
laden.addActionListener(this);
buttons.add(laden);
Button loeschen = new Button("Loeschen");
loeschen.addActionListener(this);
buttons.add(loeschen);
Label nachricht = new Label("Nachricht: ");
buttons.add(nachricht);
msg = new Label();
buttons.add(msg);
add(fields,BorderLayout.NORTH);
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add(buttons,BorderLayout.CENTER);
pack();
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
dispose();
System.exit(0);
}
});
setVisible(true);
}
public void setWarning(Warning warning)
{
this.warning=warning;
}
public void actionPerformed(ActionEvent e)
{
if(e.getActionCommand().equals(("Speichern")))
{
if(checkTicket(lottoFields)==false)
{
TYPE=SAVE;
new Warning(this,"Der Lottoschein enthält unvollständige Felder");
}
else
saveTicket();
}
else if(e.getActionCommand().equals("Loeschen"))
redoTicket();
else if(e.getActionCommand().equals("Laden"))
{
TYPE=LOAD;
loadTicket();
}
else if(e.getActionCommand().equals("OK"))
{
warning.dispose();
if(TYPE==SAVE)
doIt(TYPE);
}
else if(e.getActionCommand().equals("Cancel"))
{
System.out.println(e.getActionCommand());
warning.setVisible(false);
warning.dispose();
if(TYPE==LOAD)
TYPE=-1;
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}
}
private void doIt(int type)
{
if(type==SAVE)
saveTicket();
else if (type==LOAD)
loadTicket();
}
private boolean checkTicket(ArrayList<Field> al)
{
Iterator<Field> it=al.iterator();
boolean isOk=true;
while(it.hasNext())
{
if(it.next().isOk()==false)
isOk = false;
}
return isOk;
}
private void redoTicket()
{
Iterator<Field> it = lottoFields.iterator();
while(it.hasNext())
{
it.next().redo();
}
msg.setText("Zurückgesetzt!");
this.pack();
}
private void saveTicket()
{
Iterator<Field> it = lottoFields.iterator();
ObjectOutputStream stream=null;
FileOutputStream fo=null;
String filename;
FileDialog fd = new FileDialog(this,"Speichern",FileDialog.SAVE);
fd.setAlwaysOnTop(true);
fd.setLocation(50, 50);
fd.setVisible(true);
filename = fd.getFile();
try
{
fo = new FileOutputStream(filename);
stream = new ObjectOutputStream(fo);
while(it.hasNext())
{
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Field f=it.next();
if(!f.isOk())
{
f.redo();
}
}
stream.writeObject(lottoFields);
msg.setText("Schein gespeichert");
stream.close();
for (Field f: lottoFields)
f.redo();
}
catch (Exception e)
{
msg.setText((e.getStackTrace())[0].toString()+" schmeisst: "+e.toString());
}
this.pack();
}
private void loadTicket()
{
FileInputStream fi=null;
ObjectInputStream stream=null;
FileDialog fd = new FileDialog(this,"Speichern",FileDialog.SAVE);
fd.setAlwaysOnTop(true);
fd.setLocation(50, 50);
fd.setVisible(true);
String filename = fd.getFile();
try
{
fi = new FileInputStream(filename);
stream = new ObjectInputStream(fi);
Object o = stream.readObject();
if(o instanceof ArrayList<?>)
{
if(checkTicket((ArrayList<Field>)o)==false)
{
new Warning(this,"Der Lottoschein enthält unvollständige Felder");
}
if(TYPE==LOAD)
{
lottoFields.clear();
lottoFields=(ArrayList<Field>)o;
msg.setText("Feld geladen!");
fields.removeAll();
for(int i=0;i<lottoFields.size();i++)
{
fields.add(lottoFields.get(i));
}
msg.setText("Geladen");
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}
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}
}
stream.close();
}
catch(Exception e)
{
msg.setText(e.getMessage());
}
this.pack();
3 Die Klasse Warning
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import
import
import
import
import
import
import
java.awt.BorderLayout;
java.awt.Button;
java.awt.Dialog;
java.awt.Frame;
java.awt.Label;
java.awt.event.ActionEvent;
java.awt.event.ActionListener;
public class Warning extends Dialog implements ActionListener
{
private Button ok;
private Button cancel;
public static final int OK=1;
public static final int CANCEL=2;
private int action=0;
public Warning(LotteryTicket owner, String msg)
{
super(owner,true);
add(new Label(msg),BorderLayout.NORTH);
ok = new Button("OK");
cancel = new Button("Cancel");
ok.addActionListener(owner);
cancel.addActionListener(owner);
add(ok,BorderLayout.WEST);
add(cancel,BorderLayout.EAST);
pack();
owner.setWarning(this);
setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
if(e.getActionCommand().equals("OK"))
action=OK;
else if (e.getActionCommand().equals("Cancel"))
action=CANCEL;
}
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public int getResult(int type)
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{
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return action;
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}
44 }
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