下面这个小程序可以获取字符串点阵并在命令行下打印输出：

public class StringPixelUtils {
    private static final Map<String, boolean[][]> lettersMap = new HashMap<>();

    /* 在内存 BufferedImage里输出文本并获取它的像素点 */
    public static boolean[][] getStringPixels(String fontName, int fontStyle, int fontSize, String s) {
        String key = new StringBuilder(fontName).append("_").append(fontStyle).append("_").append(fontSize).append("_")
                .append(s).toString();
        if (lettersMap.containsKey(key))
            return lettersMap.get(key);
        Font font = new Font(fontName, fontStyle, fontSize);

        BufferedImage bi = new BufferedImage(fontSize * 8, fontSize * 50, BufferedImage.TYPE_INT_RGB);
        Graphics g = bi.getGraphics();
        Graphics2D g2d = (Graphics2D) g;
        g2d.setFont(font);
        FontMetrics fm = g2d.getFontMetrics();
        int strHeight = fm.getAscent() + fm.getDescent() - 3;
        int strWidth = fm.stringWidth(s); 
        g2d.drawString(s, 0, fm.getAscent() - fm.getLeading() - 1); 
        boolean[][] b = new boolean[strHeight][strWidth];
        for (int y = 0; y < strHeight; y++)
            for (int x = 0; x < strWidth; x++)
                if (bi.getRGB(x, y) == -1)
                    b[y][x] = true;
                else
                    b[y][x] = false;
        lettersMap.put(key, b);
        return b;
    }

    public static void main(String[] args) {
        boolean[][] c = getStringPixels(Font.SANS_SERIF, Font.PLAIN, 12, "Test点阵输出");
        for (int y = 0; y < c.length; y++) {
            boolean[] line = c[y];
            for (int x = 0; x < line.length; x++)
                if (c[y][x])
                    System.out.print("*");
                else
                    System.out.print(" ");
            System.out.println();
        }
    }
}

getStringPixels的参数依次为字体名，字体风格，字体大小及要获取像素点的字符串。上例显示结果为：

                             **     ****  *      *     *         *      
*******               *      *   *  *  ******** ****  * *    *   *   *  
   *                  *      ****** *  *  *      *   *   *   *   *   *  
   *     ***    ***  ***     *      * *  * *    * * * *** *  *   *   *  
   *    *   *  *   *  *   ********  * *  * *    * *          *********  
   *    *   *  *      *   *      *  *  * *****  *******   *      *      
   *    *****   ***   *   *      *  *  *   *      * * * * * *    *    * 
   *    *          *  *   ********  ** * ******   ***** * * *    *    * 
   *    *   *  *   *  *             * *    *    *** * * * * *    *    * 
   *     ***    ***   ** * *  *  *  *      *      * ***   * *********** 
                        *   *  *  * *      *      * * *  ** *         *