public int getIndexOf(Object key)
    {
        // Get the index from the map
        Integer index = keyToIndex.get(key);

        // Check that the key is in the map and return -1 if it is not.
        if (index == null)
        {
            return -1;
        }

        return index;
    }
public int getIndexOf(Object key)
    {
        
        Integer index = keyToIndex.get(key);

        
        if (index == null)
        {
            return -1;
        }

        return index;
    }
public int getIndexOf ( Object key ) { // Get the index from the map Integer index = keyToIndex . get ( key ) ; // Check that the key is in the map and return -1 if it is not. if ( index == null ) { return - 1 ; } return index ; }
Returns the index to which this map maps the specified key.

@param  key The key to get the index from this map for.

@return The index of the specified key, or -1 if the key is not in this map.
Returns the index to which this map maps the specified key .