Issues with binarySearch implementation

When I tried to write the following line:

int foundIndex = Collections.<K>binarySearch(keys, key);

      

        
        
        
      

    

error displayed: Parameterized method of <K>binarySearch(List<? extends Comparable<? super K>>, K)

type is   Collections

not applicable for arguments(List<K>, K)

What does the above error mean and what did I do wrong in my code?

    // Comparator used to sort elements; may be null if elements are Comparable
    public final Comparator<K> cmp;  


    {
        super(new ArrayList<K>(), new ArrayList<V>());
        cmp = new MyComparator<K>();
    }

    // Use the given comparator to sort the keys

        //super(new ArrayList<K>(), new ArrayList<V>());
        this.cmp = cmp;
    }


    {
        if(!(key instanceof Comparable) && cmp == null)
            throw new RuntimeException("The key is not instance of Comparable or comparator object is null");
    }

    public int indexOf(K key) 
    {
        int foundIndex = Collections.<K>binarySearch(keys, key);

        return foundIndex;
    }

    public int compareTo(K otherKey) 
    {
        int result = 0;
        for(int i = 0; i < keys.size(); i++)
        {
            result = ((Comparable<K>) keys.get(i)).compareTo(otherKey);
        }
        return result;
    }

      

        
        
        
      

    

MyComparator class

import java.util.Comparator;



    @Override
    public int compare(K key1, K key2)
    {
        return -1;
    }

}