Need help wit reading txt file into input.

[ShinTec]

im trying to read a txt file into an array so i can process
in the txt file it has a name followed by a space then a number
eg ben 21364

every thing complies it when i run the code it throw in arrayOUtOFBOuNDS
exceptions

here is the code

public class RunMethods
{
	//attributes
 	Boy [] boys = new Boy[0];
	private Girl [] girls;
	Scanner keyboard = new Scanner(System.in);

	
	//constructor
	public RunMethods()
	{
		
	}
	//get set methods
	public void fileReadIn()
	{
		
		int k = 0;
		try
		{
			Scanner input = new Scanner(new FileInputStream("boynames.txt"));
			
			while(input.hasNext())
			{
				String line = input.nextLine();
				String [] parts = line.split(" ");
				boys[k] = new Boy(parts[0],Integer.parseInt(parts[1]));
				k++;
			}
			input.close();	
		}
		catch(FileNotFoundException fnfe)
		{
			System.out.printf("Problem opening file....\n");
			System.exit(0);
		}
		
		for(int i = 0;i < boys.length;i++)
		{
			System.out.printf("%s\n",boys[i].toString());
		}
		
			
	}	
		
}

this is the line it doesnt like

boys[k] = new Boy(parts[0],Integer.parseInt(parts[1]));

any help would be much appreciated and i like to
thank every one in advance who does help
:)

[Fubarable]

Based on this code here:

Boy[] boys = new Boy[0];

Question: How many Boy objects will this array be allowed to hold?

[ShinTec]

it has to hold 1000 boy objects but im trying to make the code
so that it could hold more than that (eg i might want to add more names and numbers
to the txt file in the future) so i dont want to give the array a set value.i have a theory that it could be the reading the space in the text file inbetween the name of the boy and the number as a value but i want the code to skip over that space and just
read the name and the number

:confused:

[Eranga]

Your array cannot hold any object at all.

Boy[] boys = new Boy[0];

Do you know the exact meaning of the above line of code? What's the word new do and what's mean by the Boy[0] do?

[ShinTec]

yeah i understand what new
does it creates a new object of the boy class
but even if i do comment out the end of that line
like this

 Boy [] boys;// = new Boy[0];

it throws a nullPointerException instead of an array out of bounds exception and it still points to that line same line mention in the 1st post
i did a google search on it and it say i havent
given all the variable a default value of null or something!
:confused:

[Fubarable]

So either use an ArrayList which is like an array with a variable size, or use an array initialized to something other than 0, to a number that is guaranteed to be at least as big or bigger than the number of items it will need to hold.

[ShinTec]

yeahhhhhhaaaaaaaaaaa figure it out
needed to use a static method
eg add to increase the array Size
which i made it its own class class BabyUtility
here the code

//This class contains array utility used in the BoyGirl program.
//that are static

public class BabyUtility
{
	
	//methods
	//-------------------
	public static Boy [] add(Boy [] origArray,Boy thingToAdd)
	{
		Boy [] newBoy = increase(origArray);
		newBoy[newBoy.length -1] = thingToAdd;
		
		return newBoy;
	}
	//---------------------
	private static Boy [] increase(Boy [] boyToIncrease)
	{
		Boy [] newBoy = new Boy[boyToIncrease.length + 1];
		
		for(int i =0;i < boyToIncrease.length;i++)
		{
			newBoy[i] = boyToIncrease[i];
		}	
 	   
 	   return newBoy;	
 	}
	
		
}//end of class BabyUtility

and here the revised version of run methods code

boys = BabyUtility.add(boys,new Boy(parts[0],Integer.parseInt(parts[1])));

thanks for the help everyone really appreciate it.
D

[Eranga]

ShinTec, please mark the thread solved if you've already find the solution. Hope you know how to do that...