A. setLayoutManager(new GridLayout()); B. setLayout (new GridLayout(2,2)); C. setGridLayout (2,2); D. setBorderLayout();
A. setSize(int width,int height) B. setSize(int x,int y,int width,int height) C. setSize(Dimension dim) D.以上皆不是
A.FlowLayout B.BorderLayout C.GridLayout D.null (no LayoutManager)