import java.awt.*;
import java.awt.image.*;
import java.io.*;
import javax.imageio.*;
import java.awt.font.*;
import java.awt.geom.*;

public class CreateImage 
{
    public static void main(String[] args) throws Exception
    {
        int width = 100;
        int height = 100;
        String s = "你好";
        
        File file = new File("c:/image.jpg");
        
        Font font = new Font("Serif", Font.BOLD, 10);
        BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = (Graphics2D)bi.getGraphics();
        g2.setBackground(Color.WHITE);
        g2.clearRect(0, 0, width, height);
        g2.setPaint(Color.RED);
        
        FontRenderContext context = g2.getFontRenderContext();
        Rectangle2D bounds = font.getStringBounds(s, context);
        double x = (width - bounds.getWidth()) / 2;
        double y = (height - bounds.getHeight()) / 2;
        double ascent = -bounds.getY();
        double baseY = y + ascent;
        
        g2.drawString(s, (int)x, (int)baseY);
        
        ImageIO.write(bi, "jpg", file);
    }
}