Someone, Please Help Debug This Code - Programming

Someone, Please Help Debug This Code - Programming - Nairaland

Nairaland Forum › Science/Technology › Programming › Someone, Please Help Debug This Code (1046 Views)

Someone, Please Help Debug This Code by lapo(op): 9:34pm On Mar 07, 2021

Hello all, please I can't pinpoint what I am getting wrong here. Someone help please.

public class Myclass{
public static void main(String [] args){
Inventory.trophy = new Inventory();
trophy.getlastbalance();
//Inventory.goldberg = new Inventory();

trophy.name = "trophy";
trophy.initialbalance = 20;
trophy.bought = 40;
trophy.sold = 10;
System.out.println("Stock of Trophy is "+ trophy.getlastbalance());

/*goldberg.initialbalance = 10;
goldberg.bought = 24;
goldberg.sold = 10;
System.out.println("Stock of Goldberg is "+ goldberg.getlastbalance());
*/
}
}

public class Inventory{
String name = "trophy";
int initialbalance;
int bought;
int sold;

public int getlastbalance(){
return (initialbalance + bought - sold);

//System.out.println("Stock of Trophy is "+ trophy.getlastbalance());
}

}

Re: Someone, Please Help Debug This Code by toke111: 9:44pm On Mar 07, 2021

Inventory.trophy = new Inventory();. ----wrong

Inventory trophy = new Inventory();. ----wright

2 Likes

Re: Someone, Please Help Debug This Code by just2endowed: 9:54pm On Mar 07, 2021

toke111:
Inventory.trophy = new Inventory();. ----wrong

Inventory trophy = new Inventory();. ----wright

Why so?

1 Like

Re: Someone, Please Help Debug This Code by SUPREMOTM: 10:45pm On Mar 07, 2021

just2endowed:
Why so?

Inventory ------- Class Name
trophy ----------- Object Reference Variable
new --------------- keyword for creating an object
Inventory ( ) ---- Constructor of Inventory class

SYNTAX for creating objects from a class is:

Inventory trophy = new Inventory ( )
Inventory goldberg = new Inventory ( )

After you have created the 2 Inventory objects above, you can go ahead to set values for the properties of the objects or invoke the methods in the class; you do that by using the member access operator "."

@toke111 is right

4 Likes

Re: Someone, Please Help Debug This Code by lapo(op): 10:47pm On Mar 07, 2021

just2endowed:
Why so?

Thanks a lot.

Re: Someone, Please Help Debug This Code by stanliwise(m): 10:56pm On Mar 07, 2021

lapo:
Hello all, please I can't pinpoint what I am getting wrong here. Someone help please.

public class Myclass{
public static void main(String [] args){
Inventory.trophy = new Inventory();
trophy.getlastbalance();
//Inventory.goldberg = new Inventory();

trophy.name = "trophy";
trophy.initialbalance = 20;
trophy.bought = 40;
trophy.sold = 10;
System.out.println("Stock of Trophy is "+ trophy.getlastbalance());

/*goldberg.initialbalance = 10;
goldberg.bought = 24;
goldberg.sold = 10;
System.out.println("Stock of Goldberg is "+ goldberg.getlastbalance());
*/
}
}

public class Inventory{
String name = "trophy";
int initialbalance;
int bought;
int sold;

public int getlastbalance(){
return (initialbalance + bought - sold);

//System.out.println("Stock of Trophy is "+ trophy.getlastbalance());
}

}

Show your imports, what the heck is trophy?
Is it an object?

Re: Someone, Please Help Debug This Code by lapo(op): 10:57pm On Mar 07, 2021

toke111:
Inventory.trophy = new Inventory();. ----wrong

Inventory trophy = new Inventory();. ----wright

Thanks so, so much. Once I removed the dot separator, the code executed immediately

Re: Someone, Please Help Debug This Code by lapo(op): 11:13pm On Mar 07, 2021

lapo:
Hello all, please I can't pinpoint what I am getting wrong here. Someone help please.

public class Myclass{
public static void main(String [] args){
Inventory.trophy = new Inventory();
trophy.getlastbalance();
//Inventory.goldberg = new Inventory();

trophy.name = "trophy";
trophy.initialbalance = 20;
trophy.bought = 40;
trophy.sold = 10;
System.out.println("Stock of Trophy is "+ trophy.getlastbalance());

/*goldberg.initialbalance = 10;
goldberg.bought = 24;
goldberg.sold = 10;
System.out.println("Stock of Goldberg is "+ goldberg.getlastbalance());
*/
}
}

public class Inventory{
String name = "trophy";
int initialbalance;
int bought;
int sold;

public int getlastbalance(){
return (initialbalance + bought - sold);

//System.out.println("Stock of Trophy is "+ trophy.getlastbalance());
}

}

Re: Someone, Please Help Debug This Code by lapo(op): 12:41am On Mar 08, 2021

toke111:
Inventory.trophy = new Inventory();. ----wrong

Inventory trophy = new Inventory();. ----wright

Thanks so much, boss. May God continue enrich your knowledge. Amen.

Re: Someone, Please Help Debug This Code by etoluw: 1:59pm On Mar 08, 2021

lapo:
Thanks so much, boss. May God continue enrich your knowledge. Amen.

pls what is the name of the app you are using?

Re: Someone, Please Help Debug This Code by toke111: 5:00pm On Mar 08, 2021

lapo:
Thanks so much, boss. May God continue enrich your knowledge. Amen.

You welcome

Re: Someone, Please Help Debug This Code by lapo(op): 4:44pm On Mar 09, 2021

public class Myclass{
public static void main(String [] args){
Inventory trophy = new Inventory();

trophy.name = "trophy";
trophy.initialbalance = 20;
trophy.bought = 40;
trophy.sold = 10;
System.out.println("Stock of Trophy is "+ trophy.getlastbalance());

Inventory goldberg = new Inventory();

goldberg.name = "goldberg";
goldberg.initialbalance = 10;
goldberg.bought = 24;
goldberg.sold = 10;
System.out.println("Stock of Goldberg is "+ goldberg.getlastbalance());

}
}

public class Inventory{
String name;
int initialbalance;
int bought;
int sold;

public int getlastbalance(){
return (initialbalance + bought - sold);

}

}

/*This runs perfectly now. But am looking at the possibility of using Scanner class to get users input. Please, can someone guide me?
*/

Re: Someone, Please Help Debug This Code by lapo(op): 4:56pm On Mar 09, 2021

etoluw:
pls what is the name of the app you are using?

It's called Dcoder
Available on Play store.

Re: Someone, Please Help Debug This Code by Etinosa1234: 7:53am On Mar 10, 2021

lapo:
public class Myclass{
public static void main(String [] args){
Inventory trophy = new Inventory();

trophy.name = "trophy";
trophy.initialbalance = 20;
trophy.bought = 40;
trophy.sold = 10;
System.out.println("Stock of Trophy is "+ trophy.getlastbalance());

Inventory goldberg = new Inventory();

goldberg.name = "goldberg";
goldberg.initialbalance = 10;
goldberg.bought = 24;
goldberg.sold = 10;
System.out.println("Stock of Goldberg is "+ goldberg.getlastbalance());

}
}

public class Inventory{
String name;
int initialbalance;
int bought;
int sold;

public int getlastbalance(){
return (initialbalance + bought - sold);

}

}

/*This runs perfectly now. But am looking at the possibility of using Scanner class to get users input. Please, can someone guide me?
*/

To get user input, u can use either BufferedReader or Scanner... I prefer Scanner tho

First create a Scanner object

Scanner scan = new Scanner(System.in);

To get an Integer input
scan.nextInt();

To get String input
scan.nextLine() or scan.next();

To get double input
scan.nextDouble();

And so on..

I'm still Learning Java like u but I'm focusing on app development ... I dey find money grin

1 Like

Re: Someone, Please Help Debug This Code by lapo(op): 10:56am On Mar 11, 2021

Etinosa1234:
To get user input, u can use either BufferedReader or Scanner... I prefer Scanner tho

First create a Scanner object

Scanner scan = new Scanner(System.in);

To get an Integer input
scan.nextInt();

To get String input
scan.nextLine() or scan.next();

To get double input
scan.nextDouble();

And so on..

I'm still Learning Java like u but I'm focusing on app development ... I dey find money

Thanks for your contribution. I know how scanner works really, but I want a guide on how to adopt it for the program. Thanks.

1 Reply

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