Java school Project

[Law]

OK gotta go home. if you use the date thing that rusty said go look at the javadoc on it. if you IDE is nice you can double click on Date() then press shift+F2 else go check it out at java.sun

[amdretard]

On e word : school

[amdretard]

public String getCost ()
{
return int cos = min * 1.1;


}

what is wrong with this

[amdretard]

Error: The type of the left-hand side in this assignment, "int", is not compatible with the type of the right-hand side expression, "double".

i keep getting this error on many variable s what i am doing wrong[quote][/quote]

[hamin_aus]

Code: Select all

public class NooBScanner() implements Serializable
{
     public static enum CONSTANT_NOOBS{
          LAW("Law", "Master of the Pubic kNights"), 
          BOB_MUGABE("Satan", "Raging Elton John fan"), 
          AUSTIN_POWERS("jammin_za", "Brick-less");
.
.
.
}

found this hiding on the server...

Who, pray tell, is jammin_za?
NOOB!!!1!1!!one

[DJT]

Grrrr, this program is so frustrating. I rally stuck on the classes

[Basipooh]

public String getCost ()
{
return int cos = min * 1.1;


}

what is wrong with this

the problem is u have and integer "cos" declared on the left
yet u have made it equal to variable multiplied by 1.1.
1.1 is not an integer it is a double precision variable.
you cannot have a int * double.

a solution would be this:
return double cos = min * 1.1;

or

int c1 = min*11;
return double cos = c1 / 10;

[amdretard]

I am stuck with the follow set of code

Code: Select all

   {
            int option = (int) ((Math.random () * 3));
         if (option == 2)
                                {
    String cellNo = "07" + (int) (Math.random () * 4 + 1) + "-";
         for (int i = 1 ; i <= 7 ; i++)
                 {
           int x = (int) (Math.random () * 10);
               cellNo = cellNo + x; // (pin + char (x));

                          }
                      }
                 String call = cellNo;
                else

              {
                          //landline
                         String landLine = "021";
                    for (int i = 1 ; i < 7 ; i++)
                        {
                     int x = (int) (Math.random () * 10);
                     landLine = landLine + x; // (pin + char (x));

                       }


                                    }
                 String call = landLine;

                       setOutNo (call);
                        System.out.println ("Dailing " + call);

what i want ot do is for it to randomly choose between a landline no and a cell no and then make the respective no and then display the anser as well as saving it in to the class

[Law]

just tell us whats not working aswell makes life easier

Code: Select all

   {
            int option = (int) ((Math.random () * 3));
         if (option == 2)
                                {
    String cellNo = "07" + (int) (Math.random () * 4 + 1) + "-";
         for (int i = 1 ; i <= 7 ; i++)
                 {
           int x = (int) (Math.random () * 10);
               cellNo = cellNo + x; // (pin + char (x));

                          }
                      }
                 String call = cellNo;
                else

              {
                          //landline
                         String landLine = "021";
                    for (int i = 1 ; i < 7 ; i++)
                        {
                     int x = (int) (Math.random () * 10);
                     landLine = landLine + x; // (pin + char (x));

                       }


                                    }
                 String call = landLine;

                       setOutNo (call);
                        System.out.println ("Dailing " + call);

Code: Select all

   
{
    int option = (int) ((Math.random () * 3));
    if (option == 2)
    {
       String cellNo = "07" + (int) (Math.random () * 4 + 1) + "-";<<<
       for (int i = 1 ; i <= 7 ; i++)
       {
            int x = (int) (Math.random () * 10);
            cellNo = cellNo + x; // (pin + char (x));

       }
     }
     String [b]call [/b]= cellNo;<<<
               
     else
     {
             //landline
             String [b]landLine [/b]= "021"; <<<
             for (int i = 1 ; i < 7 ; i++)
             {
                  int x = (int) (Math.random () * 10);
                  landLine = landLine + x; // (pin + char (x));

              }


     }
     String call = [b]landLine[/b];  <<<

     setOutNo (call);
     System.out.println ("Dailing " + call);

were the b tags and <<<

thats 1 problem but your ide should of picked it up. The Landline and cell strings arn't visible were you set call

[v1c]

public String getCost ()
{
return int cos = min * 1.1;


}

what is wrong with this

the problem is u have and integer "cos" declared on the left
yet u have made it equal to variable multiplied by 1.1.
1.1 is not an integer it is a double precision variable.
you cannot have a int * double.

a solution would be this:
return double cos = min * 1.1;

or

int c1 = min*11;
return double cos = c1 / 10;

Your method says your returning a string and your sending back an int multiplied by a float.

[Law]

well spotted v1c.

OK now for that method asv1c said you aint returning a string. OK if it's a string you want to return use this

Code: Select all

  public static String format(double d,int toWidth,int decWidth) 
//--------------------------------------------------------------
// outputs a double in toWidth places, with decWidth decimal places
 	{
    StringBuffer wholeString;
    StringBuffer decString;
   
		double scale = Math.pow(10,decWidth);
		d = Math.round(d*scale)/scale;

    long wholePart = (long)d;
    double decimalPart = Math.abs(d - wholePart);
    int wholeWidth = toWidth - decWidth - 1;

    if (decWidth < 1)    // 0 decimal places requested - round to long
    { 
    	long l = Math.round(d);
    	return format(l,toWidth);
    }
    
		// express whole part as a string
    wholeString = new StringBuffer(format(wholePart,wholeWidth));		
		if (d<0 && d>-1)															// force "-0"
			if (wholeWidth>1)
				wholeString.setCharAt(wholeWidth-2,'-');
			else
				wholeString.insert(0,'-');
    
    decimalPart = decimalPart*scale;							// express decimal part as a 
    long decPart = Math.round(decimalPart);				// decWidth sized long
    decimalPart = decPart/scale;									// convert back to value <1

    decString = new StringBuffer(Double.toString(decimalPart));
    decString.delete(0,2);												// delete 0 and .
    if (decString.length() > decWidth)						// ensure the right size
      decString.setLength(decWidth);
    else
      while (decString.length() < decWidth) 
        decString.append('0');

    return wholeString.toString() + '.' + decString.toString();
  }

It's just i nice method for formatting double values into strings. the 1st value is the double to format. second is the characterlength of the string. third is the number of decimals you want so

Code: Select all

		
double d  = 123.4567;
double d2 = 456.123; 
System.out.println(Formatter.format(d,6,2));
System.out.println(Formatter.format(d2,6,2));
System.out.println(Formatter.format(d2,8,2));

output:
123.46
456.12
  456.12

[rustypup]

<noObs everywhere...>
Time encapsulation

Code: Select all

public class CallTime{    
    private int days, hours, minutes, seconds, millis;    
    public CallTime(long durationInMillis)
    {
        super();        
        int days = (int)CallCost.CALL_UNIT.DAY.getRepetition(durationInMillis);
        long rem = CallCost.CALL_UNIT.DAY.getRemainder(durationInMillis);
        hours = (int)CallCost.CALL_UNIT.HOUR.getRepetition(rem);
        rem = CallCost.CALL_UNIT.HOUR.getRemainder(rem);        
        minutes = (int)CallCost.CALL_UNIT.MINUTE.getRepetition(rem);
        rem = CallCost.CALL_UNIT.MINUTE.getRemainder(rem);
        seconds = (int)CallCost.CALL_UNIT.SECOND.getRepetition(rem);
        millis = (int)CallCost.CALL_UNIT.SECOND.getRemainder(rem);
    }
    public int getDays()
    {
        return days;
    }
    public int getHours()
    {
        return hours;
    }
    public int getMinutes()
    {
        return minutes;
    }
    public int getSeconds()
    {
        return seconds;
    }
    public int getMilliseconds()
    {
        return millis;
    }
    public long getDuration()
    {
        long retval = days*CallCost.CALL_UNIT.DAY.getModifier();
        retval+=hours*CallCost.CALL_UNIT.HOUR.getModifier();
        retval+=minutes*CallCost.CALL_UNIT.MINUTE.getModifier();
        retval+=seconds*CallCost.CALL_UNIT.SECOND.getModifier();
        retval+=millis;
        return retval;
    }
    public String toString()
    {
        return days+" days, "+hours+" hours, "+minutes+" minutes, "+seconds+" seconds, "+millis+" milliseconds";
    }

Cost encapsulation

Code: Select all

public class CallCost {    
    public static enum CALL_UNIT{
        SECOND(1),
        MINUTE(60),
        HOUR(CALL_UNIT.MINUTE.getModifierEntry()*60),
        DAY(CALL_UNIT.HOUR.getModifierEntry()*24);
        private int modifier;
        CALL_UNIT(int entry)
        {
            modifier = entry;
        }
        public int getModifierEntry()
        {
            return modifier;
        }
        public long getModifier()
        {
            return modifier*1000;
        }
        public long getRemainder(long input)
        {
            return input%this.getModifier();
        }
        public long getRepetition(long input)
        {
            return input/this.getModifier();
        }
        }
    
    public static final java.text.NumberFormat COST_FORMAT = java.text.DecimalFormat.getCurrencyInstance();
    
    private long duration;
    private java.math.BigDecimal costPerUnit;
    private CallTime time;
    
    public CallCost(double costPerMinute, long callDurationInMillis)
    {
        time = new CallTime(callDurationInMillis);
        costPerUnit = new java.math.BigDecimal(costPerMinute / CALL_UNIT.MINUTE.getModifier());        
    }    
    public CallTime getDuration()
    {
        return time;
    }
    public double getCost()
    {
        return time.getDuration() * costPerUnit.doubleValue();
    }
    public String formattedCost()
    {
        return COST_FORMAT.format(this.getCost());
    }
    public String toString()
    {
        return CallCost.COST_FORMAT.format(this.getCost());
    }    
}

by breaking the problem down into manageable chunks you will find your life is made much easier and there will be fewer oppurtunities to code blapsies...

now... you should consider including some networking here... check out MulticastSocket, (UDP socket which is absolutely perfect for an SMS/Chat style session)... at the same time Timer/TimerTask will provide you the means to manage the various elements ...

who's doing the gui?

[Basipooh]

now... you should consider including some networking here... check out MulticastSocket, (UDP socket which is absolutely perfect for an SMS/Chat style session)... at the same time Timer/TimerTask will provide you the means to manage the various elements ...

who's doing the gui?

hes only in gr.10 i dont think the program has to go into that level of complexity

[wizardofid]

now... you should consider including some networking here... check out MulticastSocket, (UDP socket which is absolutely perfect for an SMS/Chat style session)... at the same time Timer/TimerTask will provide you the means to manage the various elements ...

who's doing the gui?

hes only in gr.10 i dont think the program has to go into that level of complexity

But it will help with brownie points.....

[rustypup]

hes only in gr.10 i dont think the program has to go into that level of complexity

complexity schmexity.... nothing wrong with a little adventure... and fooling around with UDP is a lot of fun...

unless you are suggesting that there may never be a gui, in which case.... errg...

[amdretard]

When ever i type 1 or 2 it shows me the dailing and the last dialed number while 1 is supposed to display just dialing and 2 is supposed to display last called number but 3 does the 1 fuction

Code: Select all

while (choiceIn < 3)
                    {

                        System.out.println ("Menu 1]Make a call 2] List of numbers Dailed");
                        choiceIn = Integer.parseInt (reader.readLine ());
                        if (choiceIn < 1)
                        cellNo="";
                        landLine="";

                            {

                                {
                                    cellNo = "07" + (int) (Math.random () * 4 + 1) + "-";
                                    for (int i = 1 ; i <= 7 ; i++)
                                    {
                                        int x = (int) (Math.random () * 10);
                                        cellNo = cellNo + x; // (pin + char (x));


                                    }
                                        landLine ="021";
                                    for (int i = 1 ; i < 7 ; i++)
                                    {
                                        int x = (int) (Math.random () * 10);
                                        landLine = landLine + x;  //(pin + char (x));

                                    }
                                }
                                int option = (int) ((Math.random () * 3));
                                if (option == 2)


                                    cellphone.setOutNo (cellNo);
                                else
                                    cellphone.setOutNo (landLine);
                                       {System.out.println("Dailing " + cellphone.getOutGoing()); 
                                       System.out.println("The time of that call was" + cellphone.getTime());}
                            }
                        if (choiceIn > 1)
                        {
                            System.out.println (" Last number dailed " + cellphone.getOutGoing ());
                        }

[amdretard]

I cant figure how the method for time will work is this right

Code: Select all

public void setTime (double time)
    {

        double TotSecs = (Math.random () * 5000 + 1);
        time=TotSecs;
        double minute = TotSecs % 60;
        double mins = minute % 60;


    }

[rustypup]

to finalise....

the call itself

Code: Select all

public class CellCall {
    private long duration;    
    private String targetNumber;
    private int callCount;
    private boolean inProgress;
    private CallManager.CALL_TYPE type;
    public CellCall(String dialed, CallManager.CALL_TYPE tipo)
    {
        super();
        type = tipo;
        duration = 0;
        targetNumber = dialed;
        callCount = 0;
    }
    public void setType(CallManager.CALL_TYPE tipo)
    {
        type = tipo;
    }
    public CallManager.CALL_TYPE getType()
    {
        return type;
    }
    public void dial()
    {
        callCount++;
        duration = System.currentTimeMillis();
        inProgress = true;
    }
    public void hangUp()
    {
        duration = System.currentTimeMillis() - duration;
        inProgress = false;
    }
    public String getDialedNumber()
    {
        return targetNumber;
    }
    public synchronized CallCost getCost()
    {   
        if(callCount==0)
            return new CallCost(type.getPerMinuteRate(), 0);
        if(inProgress)
            return new CallCost(type.getPerMinuteRate(), System.currentTimeMillis()-duration);
        return new CallCost(type.getPerMinuteRate(), duration);
    }
}

a management system , doubles as the combo model in this case..

Code: Select all

public class CallManager extends java.util.Observable implements javax.swing.ComboBoxModel{
    
    public static enum UPDATE_TYPE{NUMBERADDED, CALLDIALED, CALLCANCELLED}
    public static enum CALL_TYPE{
        LANDLINE(2.15),
        CELLPHONE(1.25),
        ROAMING(4.18);
        private double rate;
        CALL_TYPE(double ratePerMinute)
        {
            rate = ratePerMinute;
        }
        public double getPerMinuteRate()
        {
            return rate;
        }
    }
    private java.util.ArrayList<CellCall> completedCalls;
    private java.util.ArrayList<javax.swing.event.ListDataListener> listListeners;
    private CellCall current;
     
    public CallManager()
    {
        super();
        completedCalls = new java.util.ArrayList<CellCall>();
        listListeners = new java.util.ArrayList<javax.swing.event.ListDataListener>();
    }
    public boolean numberExists(String nmbr)
    {
        if(this.seek(nmbr)>=0)
            return true;
        return false;
    }
    public int seek(String nmbr)
    {
        int pos=0;
        for(CellCall cc:completedCalls)
            if(cc.getDialedNumber().equals(nmbr))
                return pos;
            else
                pos++;
        return -1;
    }
    public void placeCall(String numberToDial, CALL_TYPE type)
    {   
        if(this.numberExists(numberToDial))
            current = completedCalls.get(this.seek(numberToDial));
        else
        {
            current = new CellCall(numberToDial, type);
            completedCalls.add(current);
            this.setChanged();
            this.notifyObservers(UPDATE_TYPE.NUMBERADDED);
        }
        current.dial();
        this.setChanged();
        this.notifyObservers(UPDATE_TYPE.CALLDIALED);
    }
    public CallCost hangUp()
    {
        if(current!=null)
            current.hangUp();
        this.setChanged();
        this.notifyObservers(UPDATE_TYPE.CALLCANCELLED);
        return current.getCost();
    }
    public CellCall getLastDialed()
    {
        return current;
    }
    public void fireUpdateEvent(String number)
    {
        javax.swing.event.ListDataEvent lde = new javax.swing.event.ListDataEvent(number, javax.swing.event.ListDataEvent.INTERVAL_ADDED, completedCalls.size()-1, completedCalls.size()-1);
        for(javax.swing.event.ListDataListener ldl:listListeners)
            ldl.intervalAdded(lde);
    }
    
    public Object getSelectedItem() {
        if(current!=null)
            return current.getDialedNumber();
        return "";
    }
    public void setSelectedItem(Object obj) {
        int pos = this.seek((String)obj);
        if(pos>=0)
            current = completedCalls.get(pos);
        else
        {
            current = new CellCall((String)obj, CallManager.CALL_TYPE.CELLPHONE);
            completedCalls.add(current);
        }
    }
    public void addListDataListener(javax.swing.event.ListDataListener listener) {
        listListeners.add(listener);
    }
    public Object getElementAt(int pos) {        
        return completedCalls.get(pos).getDialedNumber();
    }
    public int getSize() {
        return completedCalls.size();
    }
    public void removeListDataListener(javax.swing.event.ListDataListener listener) {
        listListeners.remove(listener);
    }
}

and on to the gui itself...
first a simple progress bar animation task..

Code: Select all

public class SimpleAnimation extends java.util.TimerTask{
    private CellCall callInProgress;
    private int currentCap, tally;
    private javax.swing.JProgressBar target;
    public SimpleAnimation(javax.swing.JProgressBar bar, CellCall c)
    {
        super();
        callInProgress = c;
        currentCap = 100;
        target = bar;
        tally = 0;
        target.setValue(0);
        target.setMaximum(currentCap);
    }
    public void run()
    {
        tally++;
        if(tally>(currentCap*0.8))
            currentCap+=currentCap*.5;
        target.setValue(tally);
        target.setMaximum(currentCap);
        target.setString(callInProgress.getCost().toString());
        target.repaint();
    }
}

and finally the gui itself..

Code: Select all

public class SimpleGUI extends javax.swing.JPanel implements java.util.Observer, java.awt.event.ActionListener{
    private javax.swing.JPanel dialPad, screen, keyPad;
    private javax.swing.JLabel screenL, dialL;
    private javax.swing.JButton dial, disconnect;
    private javax.swing.JComboBox input;
    private javax.swing.JProgressBar bar;
    private java.util.Timer animTask;
    private CallManager cMan;
    public SimpleGUI()
    {
        this(null);
    }
    public SimpleGUI(CallManager man)
    {
        super(new java.awt.BorderLayout(4,4));        
        this.initComponents();
        if(man!=null)
        {
            man.addObserver(this);
            cMan = man;
            dial.addActionListener(this);
            disconnect.addActionListener(this);
            input.setModel(man);
            input.addActionListener(this);
        }
        
        this.add(screen, java.awt.BorderLayout.NORTH);
        this.add(dialPad, java.awt.BorderLayout.CENTER);
    }
    public void initComponents()
    {
        dialPad = new javax.swing.JPanel(new java.awt.GridLayout(3, 1, 4, 4));
        screen = new javax.swing.JPanel(new java.awt.BorderLayout(2, 2));
        keyPad = new javax.swing.JPanel(new java.awt.GridLayout(1, 2, 5, 5));
        
        dial = new javax.swing.JButton(" Dial ");
        disconnect =  new javax.swing.JButton(" Disconnect ");
        disconnect.setEnabled(false);
        keyPad.add(dial);
        keyPad.add(disconnect);
        
        input = new javax.swing.JComboBox();
        input.setEditable(true);
        
        dial.setActionCommand("dal");
        disconnect.setActionCommand("dsc");
        input.setActionCommand("fld");
        
        dialL = new javax.swing.JLabel("Dial Pad");
        dialL.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        dialL.setForeground(java.awt.Color.BLUE);
        dialL.setBorder(javax.swing.BorderFactory.createEtchedBorder(1));
        
        dialPad.add(dialL, java.awt.BorderLayout.NORTH);
        dialPad.add(input, java.awt.BorderLayout.CENTER);
        dialPad.add(keyPad, java.awt.BorderLayout.SOUTH);
        
        bar = new javax.swing.JProgressBar(javax.swing.JProgressBar.HORIZONTAL, 0, 100);
        bar.setStringPainted(true);
        
        
        screenL = new javax.swing.JLabel("Somenumber");
        screenL.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        screenL.setForeground(java.awt.Color.YELLOW);
        screenL.setBackground(java.awt.Color.DARK_GRAY);
        screenL.setOpaque(true);
        screenL.setBorder(javax.swing.BorderFactory.createLoweredBevelBorder());
        screenL.setFont(new java.awt.Font("Tahoma", java.awt.Font.BOLD|java.awt.Font.TRUETYPE_FONT, 30));
        
        screen.add(screenL, java.awt.BorderLayout.CENTER);
        screen.add(bar, java.awt.BorderLayout.SOUTH);
    }
    
    public void update(java.util.Observable obs, Object obj) {
        if(obj.equals(CallManager.UPDATE_TYPE.CALLDIALED))
        {
            screenL.setText(cMan.getLastDialed().getDialedNumber()+" {"+cMan.getLastDialed().getType()+"}");
            animTask = new java.util.Timer("Animations");
            animTask.schedule(new SimpleAnimation(bar, cMan.getLastDialed()), 50, 20);
            dial.setEnabled(false);
            input.setEnabled(false);
            disconnect.setEnabled(true);
        }
        if(obj.equals(CallManager.UPDATE_TYPE.CALLCANCELLED))
        {   
            animTask.cancel();
            bar.setString("");
            bar.setValue(0);
            bar.setMaximum(10);
            dial.setEnabled(true);
            input.setEnabled(true);
            disconnect.setEnabled(false);
        }
        this.repaint();
    }
    public void actionPerformed(java.awt.event.ActionEvent ae)
    {
        if(ae.getSource().equals(input)||ae.getSource().equals(dial)&&((String)input.getSelectedItem()).length()>0)
            cMan.placeCall(((String)input.getSelectedItem()), CallManager.CALL_TYPE.CELLPHONE);
        if(ae.getSource().equals(disconnect))
            screenL.setText("Last Call :"+cMan.hangUp());
            
    }
    public static void main(String[] args)
    {
        javax.swing.JFrame frm = new javax.swing.JFrame("TFRAME");
        frm.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
        frm.getContentPane().add(new SimpleGUI(new CallManager()), java.awt.BorderLayout.CENTER);
        frm.setSize(500, 180);        
        frm.setLocationRelativeTo(null);
        frm.setVisible(true);
    }
}

note:
the first two classes are required.. if you use any version of jvm less than 1.5.0 you will encounter issues with both the generics tags , <>, as well as the usage of the enum types... these will need to be stripped out to encapsulating classes in order to function correctly...

amazing what can be achieved in ten minutes of free time... and the API docs

any questions shout....

[rustypup]

I cant figure how the method for time will work is this right

Code: Select all

public void setTime (double time)
    {

        double TotSecs = (Math.random () * 5000 + 1);
        time=TotSecs;
        double minute = TotSecs % 60;
        double mins = minute % 60;


    }

setTime(someVal) presumes that the object has a "time" ember that you wish to set.. therefore, the value passed should ideally be the new value contained within the object...

Code: Select all

public class SomeClass{
  private int time;
...
  public void setTime(int t){
 
     time  =t;
  }
}

[amdretard]

How do i generate random letter opposed to numbers

[hamin_aus]

How about assigning each letter of the alphabet a number and generate a number between 1 and 26.
Then write a method to return the letter of the alphabet that corresponds to the number generated?

[v1c]

All letters are numbers anyway, think ASCII. Just generate random numbers between 65 (upper case A) and I dont know where (lower case z) is. Then cast to char ie. (char)random_num

PS should also work with unicode as the first 256 chars match the ASCII standard, from what Ive heard.

[amdretard]

what number is space in the asc II

[amdretard]

Is there a simple few lines fo code for reading the desktops time to your program

[rustypup]

Is there a simple few lines fo code for reading the desktops time to your program

hmmm ... as for you random letter generator, note that character literals can be treated as int values... so

Code: Select all

if(val<'A'||val>'z')
   //do it again
else 
   return val

The desktop's time is the value supplied by System.currentTimeMillis()... you would use a SimpleDateFormat or DateFormat to have it formatted as you require

Code: Select all

//Provides a specific format...
SimpleDateFormat SDF = new SimpleDateFormat("dd/mm/yyy hh:MM:ss");
//provides the currently specified locale's date format....
SimpleDateFormat sdf = SimpleDateFormat().getDateInstance();
//or.... for date&time
DateFormat sdf = SimpleDateFormat().getDateTimeInstance();

sdf formats java.util.Date arguments, which handily accepts a long in its contstructor... so....

Code: Select all

String f = DateFormat.getDateTimeInstance().format(new java.util.Date(System.currentTimeMillis()))

provides you with a formatted String for output...

check the API for DateFormat, Date and SimpleDateFormat for some other nifty uses....