Help in java code

[John G]

public class Date {

private int _day;
private int _month;
private int _year;
boolean checkDate=true;
public Date(int day,int month,int year) {
if ((day>31)||(day<1)) {
System.out.println("You entered a wrong day");
checkDate=false;}
else if ((month>12)||(month<1)) {
system.out.println("You entered a wrong month");
checkDate=false;}
if (checkDate=true) {
_day=day;
_month=month;
_year=year;  
}
}

public Date()  {
_day=3;
_month=1;
_year=2009; }

public int getDay {
return _day;
    }
public int getMonth {
return _month;
    }
public int getYear {
return _year;
        }
public StringtoString{
String str= "";
str+="day:"+getDay()+"  ";
str+="month:"+getMonth()+"  ";
str+="year:"+getYear()+"  ";
return str;
}
}

Hey, maybe someone one can help me?
I've got an error message from the compiler " ';' expected".

I'm very new in this, so i don't know what to do.
Thanks for any kind of help. :S

[BestJewSinceJC]

Use code tags.

system.out.println("You entered a wrong month");
Should say: [B]S[/B]ystem.out.println ....

And in at least one spot that I noticed, you're using "=" to compare things, when you should be using "==". One equals is used for assignment (to set day = today; for example), two equals are used for comparison, does today == tomorrow for example.

Also, copy and paste the full compiler error to us, so that we can help you better. I don't see anywhere where you're missing a ';'. It could be because of your other errors, though, so fix those first.

[VernonDozier]

start quote:

public class Date {

private int _day;
private int _month;
private int _year;
boolean checkDate=true;
public Date(int day,int month,int year) {
if ((day>31)||(day<1)) {
System.out.println("You entered a wrong day");
checkDate=false;}
else if ((month>12)||(month<1)) {
system.out.println("You entered a wrong month");
checkDate=false;}
if (checkDate=true) {
_day=day;
_month=month;
_year=year;  
}
}

public Date()  {
_day=3;
_month=1;
_year=2009; }

public int getDay {
return _day;
    }
public int getMonth {
return _month;
    }
public int getYear {
return _year;
        }
public StringtoString{
String str= "";
str+="day:"+getDay()+"  ";
str+="month:"+getMonth()+"  ";
str+="year:"+getYear()+"  ";
return str;
}
}

Hey, maybe someone one can help me?
I've got an error message from the compiler ';' expected.

I'm very new in this, so i don't know what to do.
Thanks for any kind of help. :S

Code tags please:

// paste code here

The compiler will give you a line number with the error. Please point it out in the code (code tags will add line numbers).

Edit: BestJewSinceJC beat me to it.

[John G]

Ok, i fixed the first problem, but now i've got another one.

Here are my two classes:

public class Item
{
protected String _name;
private static long _catalogueNumber=1000001;
protected int _quantity;

public Item (String name, int quantity)
{
_name=name;
_quantity=quantity;
_catalogueNumber+=1;
}

public String getName()
{
return _name;
}

public int getQuantity()
{
return _quantity;
}

public long getCatalogueNumber() 
{
return _catalogueNumber;
}
}

And the second class:

public class FoodItem  extends Item {
protected String _productionDate;
protected String _expiryDate;
public FoodItem ( String name, String ProductionDate, String expiryDate){
super (name);
 _productionDate= productionDate;
 _expiryDate=expiryDate;
}
public String getProductionDate(){
return _productionDate;
}
public String getExpiryDate(){
return _expiryDate;
}

public String toString(){
 String str = "";
        str += "name: " +getName()+ "   ";
        str += "production date: " +  getProductionDate() + "   ";
        str += "expiry date: " +  getExpiryDate() + "   ";
        return str;
    }
}

And i get the error message "cannot find symbol-constructor Item(java.lang.String)", and the super(name); line is marked.

What seems to be the problem?

[VernonDozier]

Ok, i fixed the first problem, but now i've got another one.

Here are my two classes:

public class Item
{
protected String _name;
private static long _catalogueNumber=1000001;
protected int _quantity;

public Item (String name, int quantity)
{
_name=name;
_quantity=quantity;
_catalogueNumber+=1;
}

public String getName()
{
return _name;
}

public int getQuantity()
{
return _quantity;
}

public long getCatalogueNumber() 
{
return _catalogueNumber;
}
}

And the second class:

public class FoodItem  extends Item {
protected String _productionDate;
protected String _expiryDate;
public FoodItem ( String name, String ProductionDate, String expiryDate){
super (name);
 _productionDate= productionDate;
 _expiryDate=expiryDate;
}
public String getProductionDate(){
return _productionDate;
}
public String getExpiryDate(){
return _expiryDate;
}

public String toString(){
 String str = "";
        str += "name: " +getName()+ "   ";
        str += "production date: " +  getProductionDate() + "   ";
        str += "expiry date: " +  getExpiryDate() + "   ";
        return str;
    }
}

And i get the error message "cannot find symbol-constructor Item(java.lang.String)", and the super(name); line is marked.

What seems to be the problem?

Line 14:

super (name);

The superclass of FoodItem is Item . name is of type String . This line says the following:

Find the constructor in the Item class that takes a single String argument and pass it name and execute it.

No such constructor exists in Item . You have one constructor there and it takes two parameters, not one. So Java has no idea what you are trying to do with this command since nothing matches.

[John G]

Thank you!

I hava one last problem. When i try to compile this class:

public class RefrigiratedItem  extends Item {
private int _minTemperature;
private int _maxTemperature;
public RefrigiratedItem ( String name, int minTemperature, int maxTemperature, int quantity){
super (name, quantity) ;
 _ minTemperature= minTemperature;
 _maxTemperature= maxTemperature;
}
public int getMinTemp(){
return _minTemperature;
}
public int getMaxTemp(){
return _maxTemperature;
}

public String toString(){
 String str = "";
        str += "name: " +getName()+ "   ";
        str += "min temperature: " +  getMinTemp() + "   ";
        str += "max temperature: " +  getMaxTemp() + "   ";
        str += "quantity: " +  getQuantity() + "   ";
        return str;
    }
}

I get the error message "cannot find symbol-class_", and the" _ minTemperature= minTemperature;" is marked.
What can be the problem?

[Antenka]

This error caused by whitespace between '_' and 'minTemperature' here:

_ minTemperature= minTemperature;