重写java中JButton，实现图片下显示文字（根据图片宽度文字自动换行）

import java.awt.Color;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Shape;
import java.awt.event.MouseEvent;

import javax.swing.BorderFactory;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class ButtonIconText extends JButton{
private ImageIcon pic;
private String text;
public int fontsize=15;//字符大小
private int margin=0;//边
private int count;//每一行的字符个数
private int rowNum;//字符一共需要几行
private int len;//字符长度

public ButtonIconText(String icon,String text){
this.pic=new ImageIcon(icon);
this.text=text;
this.count=pic.getIconWidth()/fontsize;
this.len=text.length();
this.rowNum=len%count==0?(len/count):(len/count)+1;
this.margin=(pic.getIconWidth()%fontsize)/2;

Dimension size=new Dimension();
size.width=pic.getIconWidth();
size.height=pic.getIconHeight()+(fontsize*rowNum)+2;
this.setBackground(new Color(196,255,237));//new Color(255,204,250)
this.setPreferredSize(size);
}
protected void paintComponent(Graphics g){
super.paintComponent(g);
int x=pic.getIconWidth();
int y=pic.getIconHeight();
Image img=pic.getImage();
g.drawImage(img, 0, 0, null);
g.setColor(Color.BLUE);//字体颜色
g.setFont(new Font("宋体",Font.PLAIN,fontsize));//字体格式
int no=-1;
for(int i=0;i<(len/count);i++){
String Midtext=text.substring(0+(count*i), count+(count*i));
g.drawString(Midtext, margin,y+(fontsize-2)+(i*fontsize));
no++;
}
if(len%count!=0){
String Midtext=text.substring(count*(no+1), text.length());
int finalmargin=(x-((len-count*(no+1))*fontsize))/2;
g.drawString(Midtext, finalmargin,y+(fontsize-2)+((no+1)*fontsize));
}
}
public static void main(String[] args) {
JButton button = new ButtonIconText("F://My 8.5//Project201207//images//item//PP-R给水吊卡.gif","我是一个测试用的实用的实用的实用的实验");
button.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY));
JFrame frame = new JFrame("图形按钮");
frame.getContentPane().setLayout(new FlowLayout());
frame.getContentPane().add(button);
frame.setSize(400, 400);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}