Java Random "Fu" Character Generator – Code Tutorial

The article begins with a folklore story about the origin of the Chinese "福" character and explains the motivation to create a "福" generator to help users quickly produce festive images during the New Year.

Two utility classes are defined to simplify drawing and image handling: a FontUtil for rendering text with specific fonts and colors, and an ImgTool for loading background and icon images.

package com.mrxx.game; import java.awt.*; /*字体工具类*/ public class FontUtil { public static void drawWord(Graphics g,String str,Color color,int size,int x,int y,String font){ g.setColor(color); g.setFont(new Font(font,Font.BOLD,size)); g.drawString(str,x,y); } }

package com.mrxx.game; import javax.imageio.ImageIO; import java.awt.*; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; /*图片工具类*/ public class ImgTool { //提取图片工具1 public static BufferedImage getimg(String path){ BufferedImage img=null; try { img= ImageIO.read(new File(path)); } catch (IOException e) { e.printStackTrace(); } return img; } //工具2 public static Image getImage(String filename){ return Toolkit.getDefaultToolkit().getImage(filename); } }

The main class RandFu extends JFrame , randomly selects a font from a predefined list, chooses a color, loads a background image, and draws the "福" character at a fixed position. Pressing the space bar restarts the window to generate a new random appearance.

package com.mrxx.game; import javax.swing.*; import java.awt.*; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.image.BufferedImage; import java.util.Arrays; import java.util.List; /*主类*/ public class RandFu extends JFrame { List colorList; List arrayList; Integer index,fontRandom; BufferedImage bg=null; public RandFu(){ arrayList= Arrays.asList("楷体","宋体","华文琥珀","华文行楷","幼圆","华文新魏","华文彩云","隶书"); fontRandom=(int)((Math.random()*10)%8); System.out.println("字体："+arrayList.get(fontRandom)); bg=ImgTool.getimg("src/com/mrxx/img/bg.jpg"); //初始化 colorList=Arrays.asList(Color.gray,Color.black,Color.PINK, Color.orange,Color.RED); index=(int) ((Math.random()*10)%5); System.out.println("字体颜色"+index); setSize(600,600); setIconImage(ImgTool.getImage("src/com/mrxx/img/fu.png")); setLocationRelativeTo(null); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); setBackground(Color.red); //键盘监听 this.addKeyListener(new KeyAdapter() { @Override public void keyPressed(KeyEvent e) { if (e.getKeyCode() == KeyEvent.VK_SPACE) { reGame(); } } }); } //重启 public void reGame(){ this.dispose(); String[] args={}; main(args); } @Override public void paint(Graphics g){ g.drawImage(bg,15,50,570,535,null); FontUtil.drawWord(g,"福",colorList.get(index),250,163,400,arrayList.get(fontRandom)); } public static void main(String[] args) { RandFu randFu=new RandFu(); } }

After launching the program, pressing the space bar generates a new random "福" character; screenshots in the article illustrate the visual results.

The article also provides two image resources (background and title icon) and a Baidu Cloud link (with extraction code) for downloading the full source code.

Finally, the author encourages readers to like, share, and comment to support further content creation.