Vector of Vectors in Java 1.5 - Unchecked Conversion Odities

[Andre Bonin]

Hey all, i have a matrix-like map (like a city block) that i am trying
to build. I need sequential access and synchronized access so i'me using
vector.

my map is defined as:

// This is the Y rows of the map matrix.
Vector <Vector> mapRows = new Vector <Vector>();

for( int i = 0; i < 10; i++ ){
Vector <CityMapEntry> mapCols = new Vector<MapCols>();
mapRows.add( mapCols );
for( int j = 0; j < 10; j++ ){
CityMapEntry entry = new CityMapEntry i, j );
mapCols.add( entry );
}
}
//
// Try to get the element at x=4, y=3;, in another part of the function.
// Warning: Unchecked conversion for row = mapRows.get( locy)

Vector <CityMapEntry> row = mapRows.get( locy );
CityMapEntry loc = row.get( locx );
Thanks all.