package awtDemo;import java.awt.BorderLayout;import java.awt.Container;import javax.swing.Box;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.JTextField;/** * 使用箱式布局管理器 *  * @author HAN * */public class BoxLayout_1 extends JFrame {    /**   *   */    private static final long serialVersionUID = 6896925750596855002L;    public BoxLayout_1() {        // TODO Auto-generated constructor stub        Container container = getContentPane();        Box box = Box.createVerticalBox();        container.add(box, BorderLayout.NORTH);        box.add(Box.createVerticalStrut(5));        Box topicBox = Box.createHorizontalBox();        box.add(topicBox);        topicBox.setAlignmentX(1);        topicBox.add(Box.createHorizontalStrut(5));        JLabel topicLabel = new JLabel("主題：");        topicBox.add(topicLabel);        topicBox.add(Box.createHorizontalStrut(5));        JTextField topicTextField = new JTextField(30);        topicBox.add(topicTextField);        Box box2 = Box.createVerticalBox();        container.add(box2, BorderLayout.CENTER);        Box contentBox = Box.createHorizontalBox();        contentBox.setAlignmentX(1);        box2.add(Box.createVerticalStrut(5));        box2.add(contentBox);        contentBox.add(Box.createHorizontalStrut(5));        JLabel contentLabel = new JLabel("內容：");        contentLabel.setAlignmentY(0);        contentBox.add(contentLabel);        contentBox.add(Box.createHorizontalStrut(5));        StringBuilder stringBuilder = new StringBuilder();        String contentString = new String("利用箱式布局管理器實現組件的右對齊"                + "和上對齊，以及控制組件之間的間距！");        stringBuilder.append(contentString);        stringBuilder.append("/n");        stringBuilder.append(contentString);        contentString = stringBuilder.toString();        JTextArea contentTextArea = new JTextArea(contentString, 3, 30);        contentTextArea.setLineWrap(true);        JScrollPane scrollPane = new JScrollPane();        scrollPane.setAlignmentY(0);        scrollPane.setViewportView(contentTextArea);        contentBox.add(scrollPane);        contentBox.add(Box.createHorizontalStrut(5));        // System.out.println(contentTextArea.requestFocusInWindow());        box2.add(Box.createVerticalStrut(5));        JButton submitButton = new JButton("確定");        box2.add(submitButton);        submitButton.setAlignmentX(1);        box2.add(Box.createVerticalStrut(5));    }    /**     * @param args     */    public static void main(String[] args) {        // TODO Auto-generated method stub        BoxLayout_1 frame = new BoxLayout_1();        frame.setTitle("www.49028c.com - 使用箱式布局管理器");        frame.setVisible(true);        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        frame.pack();    }}