课程知识点总结：

界面设计：

代码：

package test;
import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JFrame;

public class Shiyi {
    public static void main(String[]args) {
        JFrame frame=new JFrame("SHIYI");
        frame.setLayout(new BorderLayout(4,4));
        frame.add(new JButton("A(1)"),BorderLayout.EAST);
        frame.add(new JButton("B(2)"),BorderLayout.WEST);
        frame.add(new JButton("C(3)"),BorderLayout.SOUTH);
        frame.add(new JButton("D(4)"),BorderLayout.NORTH);
        frame.add(new JButton("E(5)"),BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);
    }
}