array help!

[ah_gal06]

i dunno why i keep receiving cannot find symbol in the command prompt.. =( i could not compile because of the one in bold...

here is my codes.. can help me find out if got anything wrong with it?

private ArrayList<Library> librianList;
private ArrayList<OpeningHours> L1Hrs;
private ArrayList<OpeningHours> L2Hrs;

public LibrianManager() {
librianList = new ArrayList<Library>();
L1Hrs = new ArrayList<OpeningHours>();
L2Hrs = new ArrayList<OpeningHours>();

ConsultationHours L1First = new ConsultationHours("Monday", 9, 15);
ConsultationHours L1Second = new ConsultationHours("Friday", 8, 20);
L1Hrs.add(L1First); //add the 2 days to the librian1 array
L1Hrs.add(L1Second);

ConsultationHours L2First = new ConsultationHours("Tuesday", 4, 20);
L2Hrs.add(L2First);

//add to librianList
Library librian1 = new Library("L1", "Mary Anderson", L1Hrs, 40);
Library librian2 = new Library("L2", "Johnny Dept", L2Hrs, 40);
librianList.add(librian1);
librianList.add(librian2);
}

please help! thanks!

[al_Marshy_1981]

can you post your constructors for Library Class

[ah_gal06]

ok here it is:

public class Library{
private String id;
private String name;
private WorkingHours workingHours;
private int hourRate;

public Doctor(String dID, String pName, WorkingHours wrkHrs, int hrRate){
id = dID;
name = pName;
workingHours = wrkHrs;
hourRate = hrRate;
}

public String getID(){
return id;
}

public String getName(){
return name;
}

public WorkingHours getWrkHrs(){
return workingHours;
}

public int getHourRate(){
return hourRate;
}

[al_Marshy_1981]

Your Library Constructor is looking for a WorkingHours Object and you are sending it a ConsultationHours object

[pbrockway2]

Isn't it being sent an ArrayList of OpeningHours?

Either way you must send a WorkingHours instance.

[al_Marshy_1981]

yup you are right pbrockway2 it is an arraylist I made a mistake between the arraylist L1Hrs and the object L1First etc... its late :)

[JosAH]

ok here it is:

public class Library{
private String id;
private String name;
private WorkingHours workingHours;
private int hourRate;

public Doctor(String dID, String pName, WorkingHours wrkHrs, int hrRate){
id = dID;
name = pName;
workingHours = wrkHrs;
hourRate = hrRate;
}

public String getID(){
return id;
}

public String getName(){
return name;
}

public WorkingHours getWrkHrs(){
return workingHours;
}

public int getHourRate(){
return hourRate;
}

What´s that ´public Doctor( ... )' thing doing there?

kind regards,

Jos

[ah_gal06]

oops. sorry.. i m being careless.
yup! i corrected both mistakes already.. but still can't..

private ArrayList<Library> librianList;
private ArrayList<OpeningHours> L1Hrs;
private ArrayList<OpeningHours> L2Hrs;

public LibrianManager() {
librianList = new ArrayList<Library>();
L1Hrs = new ArrayList<OpeningHours>();
L2Hrs = new ArrayList<OpeningHours>();

OpeningHours L1First = new OpeningHours("Monday", 9, 15);
OpeningHours L1Second = new OpeningHours("Friday", 8, 20);
L1Hrs.add(L1First); //add the 2 days to the librian1 array
L1Hrs.add(L1Second);

OpeningHours L2First = new OpeningHours("Tuesday", 4, 20);
L2Hrs.add(L2First);

//add to librianList
Library librian1 = new Library("L1", "Mary Anderson", L1Hrs, 40);
Library librian2 = new Library("L2", "Johnny Dept", L2Hrs, 40);
librianList.add(librian1);
librianList.add(librian2);
}


public class Library{
private String id;
private String name;
private OpeningHours workingHours;
private int hourRate;

public Library(String dID, String pName, OpeningHours wrkHrs, int hrRate){
id = dID;
name = pName;
workingHours = wrkHrs;
hourRate = hrRate;
}

public String getID(){
return id;
}

public String getName(){
return name;
}

public OpeningHours getWrkHrs(){
return workingHours;
}

public int getHourRate(){
return hourRate;
}

[JosAH]

oops. sorry.. i m being careless.
yup! i corrected both mistakes already.. but still can't..

It's Sunday and I am not psychic today; you have to tell us what the errors were? Compilation errors? Runtime errors? What did they tell you (or were trying to tell you?)

kind regards,

Jos

[ah_gal06]

the error is:
LibrianManager.java:37: cannot find symbol
symbol : constructor Library(java.lang.String,java.lang.String,java.uti l.ArrayLi
st<OpeningHours>,int)
location: class Library
Library librian1 = new Library("L1", "Mary Anderson", L1Hrs, 40);
^
LibrianManager.java:38: cannot find symbol
symbol : constructor Library(java.lang.String,java.lang.String,java.uti l.ArrayLi
st<OpeningHours>,int)
location: class Library
Library librian2 = new Library("L2", "Johnny Dept", L2Hrs, 40);
^
2 errors

[ah_gal06]

yah, it is compilation error.. =(

[m00nchile]

Whats a LibrianManager? Someone who keep a record of tetra grammaton clerics and takes a shot of prozium to the neck every hour?

[ah_gal06]

Whats a LibrianManager? Someone who keep a record of tetra grammaton clerics and takes a shot of prozium to the neck every hour?

a place to keep track of the librians working hrs in the library..

[m00nchile]

I was just trying to point out that it's spelled Librarians, not Librians. While spelling and grammar may not seem like an important part of programming now, code clarity and readability is a big part of working on bigger projects.

[ah_gal06]

oops ok. sorry. my bad. i didn't get the spelling right.

[pbrockway2]

LibrianManager.java:37: cannot find symbol
symbol : constructor Library(java.lang.String,java.lang.String,java.uti l.ArrayLi
st<OpeningHours>,int)
location: class Library
Library librian1 = new Library("L1", "Mary Anderson", L1Hrs, 40);
^

The "cannot find symbol" error means you have a typo or have misremembered the arguments that a method needs. Each of the four arguments you use when you construct a Library must be the same type as in the declaration: String/String/OpenHours/int.


You have changed the constructor to use an OpeningHours argument. However you are still using L1Hrs as the argument, and that's an ArrayList of OpeningHours as I pointed out yesterday.

[krust]

I'm having the same problem as the her in my own constructor.

1) Does it mean that she have to change her opening hours argument to match the arraylist?

for example
public Library(String dID, String pName, ArrayList<OpeningHours> wrkHrs, int hrRate){
id = dID;
name = pName;
workingHours = wrkHrs;
hourRate = hrRate;
}

[pbrockway2]

1) Does it mean that she have to change her opening hours argument to match the arraylist?

Either that or change the argument being used to an instance of OpeningHours.

Bear in mind that no-one here actually knows what the code is supposed to do. I would guess that the constructor should be altered to match how it is being used (as you suggest). So library 1 has a list two different opening hours for example.

But in that case the Library class looks a little weird. workingHours would have to a list of OpeningHours so that both days were part of the state of a library. (and the return type of getWrkHrs() correspondingly changed.)

This is just a guess. The assignment itself will say what has to be achieved.

[ah_gal06]

thanks guys for ur help! appreciated! :) :o