BorderLayout的布局

import javax.swing.*;
import java.awt.*;

public class Button1
{
public static void main(String [] args)
{
Button1 gui=new Button1();
gui.go();
}
public void go()
{
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton button = new JButton("Click This!");
Font bigFont=new Font("serif",Font.BOLD,28);//更大的字体会强迫框架留更大的高度给按钮
button.setFont(bigFont);
frame.getContentPane().add(BorderLayout.NORTH,button);
frame.setSize(200,200);
frame.setVisible(true);
}
}

import javax.swing.*;
import java.awt.*;

public class Button2
{
public static void main(String [] args)
{
Button2 gui=new Button2();
gui.go();
}
public void go()
{
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton  east= new JButton("East");
JButton west=new JButton("West");
JButton north=new JButton("North");
JButton south=new JButton("South");
JButton center=new JButton("Center");

frame.getContentPane().add(BorderLayout.NORTH,north);
frame.getContentPane().add(BorderLayout.SOUTH,south);
frame.getContentPane().add(BorderLayout.WEST,west);
frame.getContentPane().add(BorderLayout.EAST,east);
frame.getContentPane().add(BorderLayout.CENTER,center);
frame.setSize(300,300);
frame.setVisible(true);
}
}