A. 有板基构成 B. 无板基构成 C. 规则式构成 D. 自由式构成
A. 对 B. 错
A. container.setLayout(null); B. container.setLayout(new FlowLayout(FlowLayout.Center,5,5)); C. container.setLayout(new BorderLayout(0,0)); D. container.setLayout(new GridLayout(0,0,0,0));