tryboxlayout.java

Java Classic Examples是我买的两本书：《JAVA经典实例》和《java入门经典源代码》里边附送光盘里带的源码

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

public class TryBoxLayout
{
  // The window object
  static JFrame aWindow = new JFrame("This is a Box Layout");

  public static void main(String[] args)
  {
    Toolkit theKit = aWindow.getToolkit();       // Get the window toolkit
    Dimension wndSize = theKit.getScreenSize();  // Get screen size

    // Set the position to screen center & size to half screen size
    aWindow.setBounds(wndSize.width/4, wndSize.height/4,   // Position
                      wndSize.width/2, wndSize.height/2);  // Size
    aWindow.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);

    // Create left column of radio buttons
    Box left = Box.createVerticalBox();
    left.add(Box.createVerticalStrut(30));              // Starting space
    ButtonGroup radioGroup = new ButtonGroup();         // Create button group
    JRadioButton rbutton;                               // Stores a button
    radioGroup.add(rbutton = new JRadioButton("Red"));  // Add to group
    left.add(rbutton);                                  // Add to Box
    left.add(Box.createVerticalStrut(30));              // Space between
    radioGroup.add(rbutton = new JRadioButton("Green"));
    left.add(rbutton);
    left.add(Box.createVerticalStrut(30));              // Space between
    radioGroup.add(rbutton = new JRadioButton("Blue"));
    left.add(rbutton);
    left.add(Box.createVerticalStrut(30));              // Space between
    radioGroup.add(rbutton = new JRadioButton("Yellow"));
    left.add(rbutton);
    left.add(Box.createGlue());                         // Glue at the end

    // Create a panel with a titled border to hold the left Box container
    JPanel leftPanel = new JPanel(new BorderLayout());
    leftPanel.setBorder(new TitledBorder(
                                 new EtchedBorder(),     // Border to use
                                 "Line Color"));        // Border title
    leftPanel.add(left, BorderLayout.CENTER);


    // Create right columns of checkboxes
    Box right = Box.createVerticalBox();
    right.add(Box.createVerticalStrut(30));             // Starting space
    right.add(new JCheckBox("Dashed"));
    right.add(Box.createVerticalStrut(30));             // Space between
    right.add(new JCheckBox("Thick"));
    right.add(Box.createVerticalStrut(30));             // Space between
    right.add(new JCheckBox("Rounded"));
    right.add(Box.createGlue());                        // Glue at the end

    // Create a panel with a titled border to hold the right Box container
    JPanel rightPanel = new JPanel(new BorderLayout());
    rightPanel.setBorder(new TitledBorder(
                                 new EtchedBorder(),    // Border to use
                                 "Line Properties"));   // Border title
    rightPanel.add(right, BorderLayout.CENTER);


    // Create top row to hold left and right
    Box top = Box.createHorizontalBox();
    top.add(leftPanel);
    top.add(Box.createHorizontalStrut(5));          // Space between vertical boxes
    top.add(rightPanel);

    // Create bottom row of buttons
    JPanel bottomPanel = new JPanel();
    bottomPanel.setBorder(new CompoundBorder(
        BorderFactory.createLineBorder(Color.black, 1),         // Outer border
        BorderFactory.createBevelBorder(BevelBorder.RAISED)));  // Inner border


    Border edge = BorderFactory.createRaisedBevelBorder();  // Button border   
    JButton button;
    Dimension size = new Dimension(80,20);
    bottomPanel.add(button = new JButton("Defaults"));
    button.setBorder(edge);
    button.setPreferredSize(size);
    bottomPanel.add(button = new JButton("OK"));
    button.setBorder(edge);
    button.setPreferredSize(size);
    bottomPanel.add(button = new JButton("Cancel"));
    button.setBorder(edge);
    button.setPreferredSize(size);



    // Add top and bottom panel to content pane
    Container content = aWindow.getContentPane();      // Get content pane
    content.setLayout(new BorderLayout());             // Set border layout manager
    content.add(top, BorderLayout.CENTER);
    content.add(bottomPanel, BorderLayout.SOUTH);

    aWindow.setVisible(true);                          // Display the window
  }
}