Java CheckBox

最新推荐文章于 2024-11-03 19:35:07 发布

原创最新推荐文章于 2024-11-03 19:35:07 发布 · 4.2k 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#java #import #class #string

Java编程技巧专栏收录该内容

32 篇文章

订阅专栏

本文将介绍如何利用Java编程语言实现一个简单的文本样式改变功能，通过使用CheckBox组件来控制文本的字体样式（粗体和斜体），并实时更新显示效果。

import java.awt.*;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

public class CheckBoxTest {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
EventQueue.invokeLater(new Runnable() {
public void run()
{
CheckBoxFrame frame = new CheckBoxFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}

}

class CheckBoxFrame extends JFrame {
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULT_HEIGHT = 200;
private static final int FONTSIZE = 20;
private JLabel label;
private JCheckBox bold;
private JCheckBox italic;

public CheckBoxFrame() {
setTitle("CheckBoxTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

JPanel southPanel = new JPanel();
bold = new JCheckBox("Bold");
italic = new JCheckBox("Italic");
southPanel.add(bold);
southPanel.add(italic);

add(southPanel, BorderLayout.SOUTH);

JPanel textPanel = new JPanel();
label = new JLabel("Jun.H Lv Dan.D.Y!");
label.setFont(new Font("Serif", Font.PLAIN, FONTSIZE));
textPanel.add(label);
add(textPanel, BorderLayout.CENTER);

ActionListener listener = new ActionListener() {
public void actionPerformed(ActionEvent event){
int mode = 0;
if (bold.isSelected()) mode += Font.BOLD;
if (italic.isSelected()) mode += Font.ITALIC;

label.setFont(new Font("Serif", mode, FONTSIZE));
}
};

bold.addActionListener(listener);
italic.addActionListener(listener);
}
}