yaxisalignx.java

The Definitive Guide to Java Swing, Third Edition by John Zukowski (Author) 源码

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

public class YAxisAlignX {
  private static Container makeIt(String title, float alignment) {
    String labels[] = {"--", "----", "--------", "------------"};

    JPanel container = new JPanel();
    container.setBorder(BorderFactory.createTitledBorder(title));
    BoxLayout layout = new BoxLayout(container, BoxLayout.Y_AXIS);
    container.setLayout(layout);

    for (int i=0,n=labels.length; i<n; i++) {
      JButton button = new JButton(labels[i]);
      button.setAlignmentX(alignment);
      container.add(button);
    }
    return container;
  }

  public static void main(String args[]) {
    Runnable runner = new Runnable() {
      public void run() {
        JFrame frame = new JFrame("Alignment Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        Container panel1 = makeIt("Left", Component.LEFT_ALIGNMENT);
        Container panel2 = makeIt("Center", Component.CENTER_ALIGNMENT);
        Container panel3 = makeIt("Right", Component.RIGHT_ALIGNMENT);

        frame.setLayout(new FlowLayout());
        frame.add(panel1);
        frame.add(panel2);
        frame.add(panel3);

        frame.pack();
        frame.setVisible(true);
      }
    };
    EventQueue.invokeLater(runner);
  }
}