2D array search

[RandomRobbo]

Hi all,

Any help?

Im not completely sure if this is correct, I am new to java and want to input kitten and get cat for example on this 2d array. I get the exception ArrayIndexOutOfBounds.

public class Farm
import java.util.Arrays;
{

// Class variables
  	
 	public static String[][] animals =
{
{"kitten", "cat"},
{"puppy", "dog"},
{"lamb", "sheep"},
{"chick", "bird"},
{"calf", "cow"},
};


public String ChangefromAnimal1toAnimal2(String aString)
{
for (int r=0; r < Farm.animals.length; r++)
{
int index = Arrays.binarySearch(Farm.animals[r], aString);
{
  	
 	for (int c=0; c < Farm.animals[r].length; c++)
{
System.out.println(Farm.animals[r][index]);
}

}

}
}

}

I think am sorted!

Thanks,

Random

[Fou-Lu]

BinarySearch returns -1 for an index on failure. If you search for "kitten" and hit the second array for "puppy" there is no resulting match. Work wise, this is easier using a single loop.

PHP Code:

    public String ChangefromAnimal1toAnimal2(String aString)
    {
        String sResult = "";
        for (int r = 0; r < Farm.animals.length && sResult.isEmpty(); r++)
        {
            if (animals[r][0].equals(aString))
            {
                sResult = animals[r][1];
            }
        }
        return sResult;
    } 


Also consider using a Hashtable to associate "kitten" with "cat" for easier lookups.

Edit:
BTW, you'd never get the OutOfBounds exception. There are two compile time errors here, one for the import statement, and one for not returning a String from your method.

[oesxyl]

Originally Posted by RandomRobbo

Hi all,

Any help?

Im not completely sure if this is correct, I am new to java and want to input kitten and get cat for example on this 2d array. I get the exception ArrayIndexOutOfBounds.


I think am sorted!

Thanks,

Random

I think you removed the content and this against forum rules. Put him back please.

best regards