Java学习之利用单选按钮进行字体的设置

缺乏、安全感 2023-01-18 06:42 109阅读 0赞

**案例代码：**

import java.awt.*;
    import javax.swing.*;
    import java.awt.event.*;
    	public class Example8_15 extends JFrame{
        
    	private JRadioButton italic;
    	private JRadioButton bold;
    	private JLabel label;
    	private ButtonGroup group;
    	private JPanel panel;
    	public Example8_15(){
        
    	//创建一个JLabel标签,居中对齐
    	label = new JLabel("来改变字体形态",JLabel.CENTER);
    	label.setFont(new Font("宋体",Font.PLAIN,20));//设置标签文本的字体
    	this. add(label);//在 CENTER域添加标签
    	panel = new JPanel();
    	group = new ButtonGroup() ;
    	//添加单选按钮
    	addJRadioButton("字体倾斜");
    	addJRadioButton("字体加粗");
    	this.add(panel, BorderLayout.SOUTH); 
    	this.setSize(300,300);
    	this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    	this.setVisible(true);
    	}
    	private void addJRadioButton(final String text){
        
    		JRadioButton radioButton = new JRadioButton(text);//添加单选按钮
    		group.add(radioButton);
    		panel.add(radioButton);//添加监听事件
    		radioButton.addActionListener(new ActionListener(){
        
    			public void actionPerformed(ActionEvent e){
        
    				int mode = 0;
    				if("字体倾斜".equals(text)){
        
    					mode += Font.ITALIC;
    					label.setFont(new Font("宋体", mode, 20)) ; 
    				}else if("字体加粗".equals(text)) {
        
    					mode += Font.BOLD;
    					label.setFont(new Font("宋体", mode, 20));
    				}else{
        
    					label.setFont(new Font("宋体", Font.PLAIN,20));
    				}
    			}
    		});
    	}
    	public static void main(String[] args){
        
    		new Example8_15();
    	}
    }

**案例运行图：**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NzA2MjkwNw_size_16_color_FFFFFF_t_70_pic_center]

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