Help! 1 error...

[DC12]

import java.util.Arrays;
import java.util .Scanner;

/**
This program demonstrates the linear search algorithm.
*/
public class LinearSearcherTest
{
public static void main(String[] args)
{
int[] a = ArrayUtil.randomIntArray(20, 100);
System.out.println(Arrays.toString (a));
LinearSearcher searcher = new LinearSearcher(a);
Scanner in = new Scanner(System.in);

boolean done = false;
while (!done)
{
System.out.print("Enter number to search for, -1 to quit: ");
int n = in.nextInt();
if (n == -1)
done = true;
else
{
int pos = searcher.search(n);
System.out. println("Foundinposition" + pos);
}
}
}
}

cannot find symbol
symbol : variable ArrayUtil
location: class LinearSearcherTest
int[] a = ArrayUtil.randomIntArray(20, 100);
^
1 error

[JosAH]

cannot find symbol
symbol : variable ArrayUtil
location: class LinearSearcherTest
int[] a = ArrayUtil.randomIntArray(20, 100);
^
1 error

As the compiler says: it can't find an ArrayUtil class (there isn't one in the core class distribution). If you have one make your classpath variable refer to it.

kind regards,

Jos

[PhHein]

Hmm I'd use other words than the compiler, but that class is not part of the SE API.

EDIT: What Jos said.

[DC12]

I have this to go with it aswel, its just soooo confusing :S

/**
A class for executing linear searches through an array.
*/
public class LinearSearcher
{
/**
Constructs the LinearSearcher.
@param anArray an array of integers
*/
public LinearSearcher(int[] anArray)
{
a = anArray;
}

/**
Finds a value in an array, using the linear search
algorithm.
@param v the value to search
@return the index at which the value occurs, or -1
if it does not occur in the array
*/
public int search(int v)
{
for (int i = 0; i < a.length; i++)
{
if (a[i] == v)
return i ;
}
return -1;
}
private int[] a;
}

[JosAH]

I have this to go with it aswel, its just soooo confusing :S

Yes, that's another class you're using but as you can see it isn't the ArrayUtil class. Have you written the code yourself?

kind regards,

Jos

[DC12]

yeah my friend and I wrote it, I have a very basic understanding of Java always seem to make mistakes!

[JosAH]

yeah my friend and I wrote it, I have a very basic understanding of Java always seem to make mistakes!

So you must have at least three classes: LinearSearcher, LinearSearcherTest and ArrayUtil and none of them have a package definition. They should all be stored in the same directory. Go to that directory and do:

javac -cp . *.java

kind regards,

Jos