Thread: Learning Java

Originally Posted by Zymus

In order to make the code easier to read, place it inside code tags (the # sign wraps the selected text in code tags).

We are trying to replace the code tags with the highlight tag (please see my signature)
I have edited the post and added them for you this time.

I've looked over your code.

	public static int Numbers()
	{		
		for (int i = 0;i < 10; i++)
		{
		System.out.println (i);
		}	
	return 0;
		//why use return 0?
	}

You say why return 0? Well with a method like this you have to return the variable type. So in this case it needs to return an integer value. So you could return 0, 100, 420 or any integer value.

You could change int to void in which case you wouldn't need to return anything.

	public static void Numbers()
	{		
		for (int i = 0;i < 10; i++)
		{
		System.out.println (i);
		}	
	}

To pass the value of i to the next method I would call Convert() within your for loop and update the Convert method like so:

	public static void Numbers()
	{		
		for (int i = 0;i < 10; i++)
		{
		//System.out.println (i);
		Convert(i);
		}	
 
	}
 
	public static void Convert(int i)
	{
		System.out.println(i);
	}

Try it for yourself..

Is this useful to you at all?

- Main now has 2 arrays declared in it called intArray and charArray. intArray is for the storage of the values created in numbers.

- Numbers() method takes the intArray, stores the values for later use but also prints out each value to the screen...as you wanted.

- Convert() method takes the filled intArray and the empty charArray and converts each of the numbers (0 - 9) to their respective char version using the Character method, forDigit(). Then they are stored in charArray.

- charArray is printed to the screen.

*NOTE* Character.forDigit(numbers[x], 10) is there because I know the values wont exceed past the value 9. This won't work if your values exceed the value 9.

public class Example2 {
 
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
 
		//DECLARE ARRAYS
		int[] intArray = new int[10];
		char[] charArray = new char[10];
 
		//call method
		//this works to call the method of numbers below
		intArray = Numbers(intArray);
 
		//call method to convert string of numbers to character Array
		charArray = Convert(intArray, charArray);
 
                //print charArray to screen
		for(int i = 0; i < 10; i++)
		{
			System.out.print(charArray[i] + " ");
		}
	}
 
	public static int[] Numbers(int[] numbers)
	{
		System.out.print("These are the ints: ");
		for (int i = 0; i < 10; i++)
		{
			numbers[i] = i;	//Store number in an integer array
			System.out.print(numbers[i] + " "); //Print each number to screen
		}
		System.out.println("");
 
		return numbers;
	}
 
	//Returns an array of numbers as characters
	//@PARAM The array to be converted
	//and The array to store the conversions
	public static char[] Convert(int[] numbers, char[] converted)
	{
		System.out.print("These are the chars: ");
		for(int i = 0; i < converted.length; i++)
		{
			converted[i] = Character.forDigit(numbers[i], 10);
		}
 
		return converted;
	}
}

Output:

L:\Code\Java\java Exercise2
These are the ints: 0 1 2 3 4 5 6 7 8 9
Theses are the chars: 0 1 2 3 4 5 6 7 8 9