border1.java

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

//file: Border1.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Border1 extends JPanel {

  public Border1(  ) {
    setLayout(new BorderLayout(  ));
    add(new JButton("North"), BorderLayout.NORTH);
    add(new JButton("South"), BorderLayout.SOUTH);
    add(new JButton("East"), BorderLayout.EAST);
    add(new JButton("West"), BorderLayout.WEST);
    add(new JButton("Center"), BorderLayout.CENTER);
  }

  public static void main(String[] args) {
    JFrame f = new JFrame("Border1");
    f.addWindowListener(new WindowAdapter(  ) {
      public void windowClosing(WindowEvent e) { System.exit(0); }
    });
    f.setSize(300, 300);
    f.setLocation(200, 200);
    f.setContentPane(new Border1(  ));
    f.setVisible(true);
  }
}