border2.java

learning java的源代码。书中每个实例都有相关的代码example。

//file: Border2.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Border2 extends JPanel {

  public Border2(  ) {
    setLayout(new BorderLayout(  ));
    JPanel p = new JPanel(  );
    p.add(new JButton("North"));
    add(p, BorderLayout.NORTH);
    p = new JPanel(  );
    p.add(new JButton("South"));
    add(p, BorderLayout.SOUTH);
    p = new JPanel(  );
    p.add(new JButton("East"));
    add(p, BorderLayout.EAST);
    p = new JPanel(  );
    p.add(new JButton("West"));
    add(p, BorderLayout.WEST);
    p = new JPanel(  );
    p.add(new JButton("Center"));
    add(p, BorderLayout.CENTER);
  }

  public static void main(String[] args) {
    JFrame f = new JFrame("Border2");
    f.addWindowListener(new WindowAdapter(  ) {
      public void windowClosing(WindowEvent e) { System.exit(0); }
    });
    f.setSize(225, 150);
    f.setLocation(200, 200);
    f.setContentPane(new Border2(  ));
    f.setVisible(true);
  }
}