[JAVA100例]018、使用HTML语言
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import java.awt.*;
import java.awt.event.*;
/**
* pTitle: 在swing中使用html语言/p
* pDescription: 这里演示使用html语言在swing面板上构造显示信息/p
* pCopyright: Copyright (c) 2003/p
* pFilename: HtmlDemo.java/p
* @version 1.0
*/
public class HtmlDemo extends JPanel
implements ActionListener {
JLabel theLabel;
JTextArea htmlTextArea;
/**
*br方法说明:构造器,描述窗体中的成员
*br输入参数:
*br返回类型:
*/
public HtmlDemo() {
setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
String initialText = "html" +
"颜色和字体测试:" +
"ul" +
"lifont color=redred/font" +
"lifont color=blueblue/font" +
"lifont color=greengreen/font" +
"lifont size=-2small/font" +
"lifont size=+2large/font" +
"liiitalic/i" +
"libbold/b" +
"/ul";
//定义一个文本框
htmlTextArea = new JTextArea(10, 20);
htmlTextArea.setText(initialText);
JScrollPane scrollPane = new JScrollPane(htmlTextArea);
//定义按钮
JButton changeTheLabel = new JButton("改变显示");
changeTheLabel.setMnemonic(KeyEvent.VK_C);
changeTheLabel.setAlignmentX(Component.CENTER_ALIGNMENT);
changeTheLabel.addActionListener(this);
//定义标签
theLabel = new JLabel(initialText) {
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
public Dimension getMinimumSize() {
return new Dimension(200, 200);
}
public Dimension getMaximumSize() {
return new Dimension(200, 200);
}
};
//设置标签的对齐方式
theLabel.setVerticalAlignment(SwingConstants.CENTER);
theLabel.setHorizontalAlignment(SwingConstants.CENTER);
//构造一个带边框的左边的编辑面板
JPanel leftPanel = new JPanel();
leftPanel.setLayout(new BoxLayout(leftPanel, BoxLayout.PAGE_AXIS));
leftPanel.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder(
"编辑HTML,点击按钮显示结果。"),
BorderFactory.createEmptyBorder(10,10,10,10)));
leftPanel.add(scrollPane);
leftPanel.add(Box.createRigidArea(new Dimension(0,10)));
leftPanel.add(changeTheLabel);
//构造一个带边框的右边显示的面板
JPanel rightPanel = new JPanel();
rightPanel.setLayout(new BoxLayout(rightPanel, BoxLayout.PAGE_AXIS));
rightPanel.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("这里使用标签显示HTML结果"),
BorderFactory.createEmptyBorder(10,10,10,10)));
rightPanel.add(theLabel);
setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
add(leftPanel);
add(Box.createRigidArea(new Dimension(10,0)));
add(rightPanel);
}
/**
*br方法说明:事件监听,当用户点击按钮触发
*br输入参数:
*br返回类型:
*/
public void actionPerformed(ActionEvent e) {
theLabel.setText(htmlTextArea.getText());
}
/**
*br方法说明:主方法
*br输入参数:
*br返回类型:
*/
public static void main(String[] args) {
JFrame.setDefaultLookAndFeelDecorated(true);
//创建窗体
JFrame frame = new JFrame("HtmlDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//创建面板
JComponent newContentPane = new HtmlDemo();
newContentPane.setOpaque(true);
frame.setContentPane(newContentPane);
//显示窗体
frame.pack();
frame.setVisible(true);
}
}