NB4L1

public final class Matrix<T>{	public static void main(String[] args)	{		Matrix<Integer> m = new Matrix<Integer>(3, 3);				m.set(1, 1, Integer.valueOf(3));				System.out.println(m.get(1, 1));	}		private final Object[][] _array;		public Matrix(int i, int j)	{		_array = new Object[i][j];	}		public T get(int i, int j)	{		return (T)_array[i][j];	}		public T set(int i, int j, T obj)	{		Object old = _array[i][j];				_array[i][j] = obj;				return (T)old;	}}