下列方法中哪一个方法能实现在屏幕上描绘一个实心的直角矩形( )
A.
drawRect(int x, int y, int width, int height)
B.
fillRect(int x, int y, int width, int height)
C.
drawRoundRect(int x,int y,int width,int height,int arcWidth,int arcHeight)
D.
fillRoundRect(int x,int y,int width,int height,int arcWidth,int arcHeight)