Thanks alot, silly me i could KISS you right now lol, it really helped, but I would also need to a remove passenger functionality. . .

EDIT**I modified the code thus;

public class Aircraft
{
private ArrayList<Passengers>pass=new ArrayList<Passengers>();
String name;
int fare;
int weight;
int luggage;
Passengers p1 = new Passengers(name,fare,weight,luggage);
public Aircraft(String i,int f, int w, int l){
name=i;
fare=f;
weight=w;
luggage=l;

}
/** public void addPass(Passengers p){
pass.add(p);
System.out.println(p.toString());
}
*/
public void addPass(String i,int f, int w, int l){
//create an instance of Passengers to be added
int tpw=w*l;
if(tpw>250){
System.out.println("Too much weight";
System.out.println(i+"Cannot be added!";
}else{
pass.add(p1); //add the new created object to the arralist
System.out.println("You have just added"+i); //print out the name of the passanger u just added by getting its name u initialized
}
}
public void checkPass(){
System.out.println(p1.getName());

}

}

I get a 'null' whenever i run the checkPass() method, why is that?

Dolemite:

Thanks alot, silly me i could KISS you right now lol, it really helped, but I would also need to a remove passenger functionality. . .

are u female? if(true) 1 million times coz we have few female java programmers.
Sure, u can remove a Passanger by saying

public void removePassanger(String nameOfPassanger){
     int passangerIndexToRemove = 0;
     for(Passangers p : pass){
          if(p.getName().equals(nameOfPassanger){
               pass.remove(passangerIndexToRemove);
          }
          else{
                 passangerIndexToRemove++;
          }
     }
}

including the function above can do it ,
it will remove the passanger from the ArrayList of u provide the passanger name on the list !
Hope this helps ?

Edited. . . Thanks

Dolemite:

Edited. . . Thanks

works ? u welcome thou

EDIT**I modified the code thus;

public class Aircraft
{
private ArrayList<Passengers>pass=new ArrayList<Passengers>();
String name;
int fare;
int weight;
int luggage;
Passengers p1 = new Passengers(name,fare,weight,luggage);
public Aircraft(String i,int f, int w, int l){
name=i;
fare=f;
weight=w;
luggage=l;

}
/** public void addPass(Passengers p){
pass.add(p);
System.out.println(p.toString());
}
*/
public void addPass(String i,int f, int w, int l){
//create an instance of Passengers to be added
int tpw=w*l;
if(tpw>250){
System.out.println("Too much weight";
System.out.println(i+"Cannot be added!";
}else{
pass.add(p1); //add the new created object to the arralist
System.out.println("You have just added"+i); //print out the name of the passanger u just added by getting its name u initialized
}
}
public void checkPass(){
System.out.println(p1.getName());

}

}

I get a 'null' whenever i run the checkPass() method, why is that?

I haven't tried that one though, the remove command. . .

Dolemite:

EDIT**I modified the code thus;I get a 'null' whenever i run the checkPass() method, why is that?

I haven't tried that one though, the remove command. . .

u got this wrong
use this

public class Aircraft
{
    private ArrayList<Passengers>pass=new ArrayList<Passengers>();
    String name;
    int fare;
    int weight;
    int luggage;
    Passengers p1;
    public Aircraft(String i,int f, int w, int l){
        name=i;
        fare=f;
        weight=w;
        luggage=l;
        p1 = new Passengers(name,fare,weight,luggage);
    }
   /** public void addPass(Passengers p){
        pass.add(p);
       System.out.println(p.toString());
    }
    */
   public void addPass(String i,int f, int w, int l){
       int tpw=w*l;
       if(tpw>250){
           System.out.println("Too much weight";
           System.out.println(i+"Cannot be added!";
        }else{
       pass.add(p1); //add the new created object to the arralist
       System.out.println("You have just added"+i); //print out the name of the passanger u just added by getting its name u initialized
    }
}
   public void checkPass(){
      System.out.println(p1.getName());    
    }
   
}

ur coding logic is kinda poor, are u copying/modifying any code there?

I tried your code, it still doesn't work. . .

Thats the modules logic my friend, It depends on ur class structure and how u implementing it. Try to fix it, if u cant, zip all ur src codes and send to my mail : segsalerty@yahoo.com

public class Aircraft
{
private ArrayList<Passengers>pass=new ArrayList<Passengers>();
private int seats;
private String name;
private int fare;
private int weight;
private int luggage;
private int tpw;
private int totalfares;
private Passengers p;
public void addPass(String i,int f, int w, int l){
name=i;
fare=f;
weight=w;
luggage=l;
p= new Passengers(name,fare,weight,luggage);
tpw=w*l;
if(tpw>250){
System.out.println("Too much weight";
System.out.println(i+"Cannot be added!";
}else{
pass.add(p);
totalfares=totalfares+f; //add the new created object to the arralist
System.out.println("You have just added"+i); //print out the name of the passanger u just added by getting its name u initialized
}
}
public void checkPass(){
System.out.println(pass);
}
public int checkTotalfares(){
System.out.println(totalfares);
return totalfares;
}
public void getTpw(){
p.getTpw();

}
public void TotalTpw(){
p.getTotalTpw();
}

}

Module what now? anyway this one works, please have a look and tell me if my logic is faulty. . .

U did quite well with d Aircraft class desing, its just looking as if u re getting stucked trying to get ur class properties. Well, i get ur logic, will do smth to it when i connect to my PC tonite, coz am on mobile rite nw. Pls, be patient wit me.
****when i said nothing wrong wit the modules i provoded to u earlier, i meant those functions i provided to u will do there job as u required if u use them in the right way in ur class to suit ur need.

public class Aircraft
{
    private ArrayList<Passengers>pass=new ArrayList<Passengers>(); //holdin all passangers
    private int seats;
    private String name;
    private int fare;
    private int weight;
    private int luggage;
    private int tpw;
    private int totalfares;
    private Passengers p;
   public void addPass(String i,int f, int w, int l){
       name=i;
       fare=f;
       weight=w;
       luggage=l;
       p= new Passengers(name,fare,weight,luggage);
       tpw=w*l;
       if(tpw>250){
           System.out.println("Too much weight";
           System.out.println(name +" Cannot be added!";
        }else{
          pass.add(p); //add the passanger 
          totalfares=totalfares+fare; //add to the total fares
          System.out.println("You have just added "+name);
        }
    }
    public ArrayList<Passengers> getPass(){
      System.out.println(pass);
      return pass;      
    }
    public int getTotalfares(){
        System.out.println(totalfares);
        return totalfares;
    }   
}

this shld help?

Thanks, good to have a genius like you here, you're the ONLY useful person here on nairaland!!

Thanks, good to have a genius like you here, you're the ONLY useful person here on nairaland!!

Hehehe !!!!

Dolemite:

Thanks, good to have a genius like you here, you're the ONLY useful person here on nairaland!!

U are so much welcome! u dnt need to thank me again, u already gave the sweet some post back! lolz
And mind u, am not the ONLY useful person here on nairaland ooo ! pls, dnt make my head over-swell oooo! We so much have so many talented people on here. ok?

Fayimora:


Hehehe !!!!

Da Main Boss, whats that suppose to mean ?

Just feeling the comment man!

segsalerty:


public class Aircraft
{
    private ArrayList<Passengers>pass=new ArrayList<Passengers>(); //holdin all passangers
    private int seats;
    private String name;
    private int fare;
    private int weight;
    private int luggage;
    private int tpw;
    private int totalfares;
    private Passengers p;
   public void addPass(String i,int f, int w, int l){
       name=i;
       fare=f;
       weight=w;
       luggage=l;
       p= new Passengers(name,fare,weight,luggage);
       tpw=w*l;
       if(tpw>250){
           System.out.println("Too much weight";
           System.out.println(name +" Cannot be added!";
        }else{
          pass.add(p); //add the passanger
          totalfares=totalfares+fare; //add to the total fares
          System.out.println("You have just added "+name);
        }
    }
    public ArrayList<Passengers> getPass(){
      System.out.println(pass);
      return pass;     
    }
    public int getTotalfares(){
        System.out.println(totalfares);
        return totalfares;
    }   
}

You can declare p inside the addPass method. no need making it an instance variable

I tried to use the remove passenger method but i get a 'concurrent modification exception' error at runtime.

^^

Segs where are youuuuuuuuuuuuuuuuuu??

removed

Segs has a better knowledge of my code. I appreciate your help.

Segs has a better knowledge of my code. I appreciate your help.

Lmao, wow! but thats a bit harsh on those that wanted to help and I would have fallen into that cause i wanted to help. Would get Segs for you now,

Lol, no no he's been helping me with the code, all help is welcomed please. . .

Alright, so what do you have and what do you want to do?

candylips:

removed

u wanna remove me ?  or  think i ran away ?

Dolemite:

Segs has a better knowledge of my code. I appreciate your help. 

U really love to make my head swell the more, My Head will just Burst one day and there will be No Segsalerty to call again after my head is gone off my body,  there are other dudes that are very brilliant here,  nobody is [b]Perfect[/b]est

Fayimora:

Lmao, wow! but thats a bit harsh on those that wanted to help and I would have fallen into that cause i wanted to help. Would get Segs for you now,

Lol Dude, she really didnt means to, she is just kinda used to giving me those kisses , u know ? but,  this time around, its your turn to have some sweet kisses on your lips to show alot of Appreciation after u've helped her! Thanks in advance

Dolemite:

Lol, no no he's been helping me with the code, all help is welcomed  please. . .

Good ! u just spoken well So, post the problem code so that he can help u,  what if i travelled nko?

public class Aircraft
{
private ArrayList<Passengers>pass=new ArrayList<Passengers>(); //holdin all passangers
private int seats;
private String name;
private int fare;
private int weight;
private int luggage;
private int tpw;
private int totalfares;
private Passengers p;
public void addPass(String i,int f, int w, int l){
name=i;
fare=f;
weight=w;
luggage=l;
p= new Passengers(name,fare,weight,luggage);
tpw=w*l;
if(tpw>250){
System.out.println("Too much weight";
System.out.println(name +" Cannot be added!";
}else{
pass.add(p); //add the passanger
totalfares=totalfares+fare; //add to the total fares
System.out.println("You have just added "+name);
}
}
public ArrayList<Passengers> getPass(){
System.out.println(pass);
return pass;
}
public int getTotalfares(){
System.out.println(totalfares);
return totalfares;
}
}

How can I implement a remove passenger method in this code that searches for the passenger by name and removes the whole object of the passenger. . .

Dolemite

How can I implement a remove passenger method in this code that searches for the passenger by name and removes the whole object of the passenger. . .

Try this method:

[s]public void RemovePassenger(ArrayList<Passengers> pass){
int index = pass.indexOf(name);
if (index != -1)
{
pass.remove(name);
}
else
{
System.out.println("passanger not in list";
}

return;
} [/s]

Sorry these should be done with an Iterator

Thanks alot, but how do i test for this? and does it take off the whole object from the list?

eg. objectofaircraft.RemovePassenger("John"; // won't compile.

csharpjava:

DolemiteTry this method:

public void RemovePassenger(ArrayList<Passengers> pass){
        int index = pass.indexOf(name);
        if (index != -1)
        {
        pass.remove(name);
        }
        else
        {
        System.out.println("passanger not in list";
        }
       
        return;
    }     

Its my turn to have some sweet kisses too

The code is incorrect, you are passing an ArrayList of Passenger objects when you should have sent the Passenger object, then you are checking for the "name" (which is a Passenger Object Attribute - String Object) from a data structure that contains Passenger Objects 

2much what do you suggest I do?

Dolemite:

2much what do you suggest I do?

The solution: 

The Passenger Object is incomplete, by the look of things each Passenger has 4 variables:  name,fare,weight,luggage.  None of these attributes are unique.

In the REAL WORLD each passenger is UNIQUE and the details will be stored in a database; hence each passenger will be identified by an exclusive passenger NUMBER.  So your class would be something like:

public class Passenger {
int passengerID;
int seats;
String name;
int luggage;

public Passenger(int seats, String name, int luggage, int passengerID) {
this.passengerID = passengerID;
this.seats = seats;
this.name = name;
this.luggage = luggage;
}
}

Now you can create Passengers with Unique Ids and this is equivalent to imitating a database.  An sql query would be something like:

DELETE FROM passengers
WHERE passengerID = some_passengerID;

so in code we could write:

public void removePassenger(int pId) {

//Iterate through the arrayList and check for the ID

//Once you find the Passenger with the correct ID use the remove(Object) method of the ArrayList
}


********** This problem could be solved easier by using a HashMap  instead of an ArrayList *********

You probably want to look up Maps, Thats exactly what you need to give the perfect algorithm. Its also designed to help in problems like this