java在窗体通过按钮设置字体大小

package test;

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionListener;

import javax.swing.*;

public class RadioButtonFrame extends JFrame 
{
	private JPanel buttonPanel;
	private ButtonGroup group;
	private JLabel label;
	private static final int SIZE = 36;
	
	public RadioButtonFrame()
	{
		label = new JLabel("hzy is good.");
		label.setFont(new Font("hzy", Font.BOLD, SIZE));
		add(label, BorderLayout.NORTH);
		buttonPanel = new JPanel();
		group = new ButtonGroup();
		
		addRadioButton("Small", 8);
		addRadioButton("Medium", 12);
		addRadioButton("Large", 18);
		addRadioButton("Bigest", 36);
		
		add(buttonPanel, BorderLayout.SOUTH);
		pack();
		
	}
	public void addRadioButton(String name, int size) 
	{
		boolean selected = size == SIZE;
		var button = new JRadioButton(name, selected);
		group.add(button);
		buttonPanel.add(button);
		
		ActionListener listener = event ->
			label.setFont(new Font("hzy", Font.PLAIN, size));
			
		button.addActionListener(listener);
	}
	public static void main(String[] args) 
	{
		EventQueue.invokeLater(()->
		{
			var frame = new RadioButtonFrame();
			frame.setSize(300, 200);
			frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//窗口关闭，应用程序结束
			frame.setVisible(true);	//显示窗口
			
		});
	}
}