java 模拟led屏展示

public class Test { 
   public static void main(String[] args) { 
     LED led = new LED(); 
     char[][] chss = led.getLED("0123456789"); 
     LED.print(chss); 
   } 
 } 
  
 class LED { 
   /**  
    * 每个 LED 的大小，可以进行调整  
    */ 
   public final static int ROW = 7; 
   public final static int COL = 7; 
   /** 
    * 每个 LED 的间隔 
    */ 
   private final static int SEPARATOR = 1; 
   private final static char FILL_CHAR = '#'; 
   private final static char SPACE_CHAR = ' '; 
  
   /** 
    * 工具方法，用于输出 LED 
    * @param chs 
    */ 
   public static void print(char[][] chs) { 
     for (int i = 0; i  < chs.length; i++) { 
       for (int j = 0; j  < chs[i].length; j++) { 
         System.out.print(chs[i][j]); 
       } 
       System.out.println(); 
     } 
   } 
  
   /** 
    * 根据数字得到 LED 显示数组 
    * @param num * 
    * @return 
    */ 
   public char[][] getLED(String num) { 
     char[] chs = num.toCharArray(); 
     char[][][] chsss = new char[chs.length][][]; 
     for (int i = 0; i  < chs.length; i++) { 
       chsss[i] = showLed(chs[i] - '0'); 
     } 
     return putManyLed(chsss); 
   } 
  
   /** 
    * 将多个 LED 组成一排 
    * @param chsss 
    * @return 
    */ 
   private char[][] putManyLed(char[][][] chsss) { 
     if (chsss.length  < 1) { 
       throw new IllegalArgumentException("LED is NULL!"); 
     } 
     if (chsss.length == 1) { 
       return chsss[0]; 
     } 
     char[][] chss = new char[ROW][chsss.length * (COL + SEPARATOR) 
         - SEPARATOR]; 
     for (int i = 0; i  < chsss.length; i++) { 
       int m = i * (COL + SEPARATOR); 
       for (int j = 0; j  < chsss[i].length; j++) { 
         for (int k = 0; k  < chsss[i][j].length; k++) { 
           chss[j][m + k] = chsss[i][j][k]; 
         } 
       } 
     } 
     for (int i = 0; i  < chss.length; i++) { 
       for (int j = 0; j  < chss[i].length; j++) { 
         if (chss[i][j] != FILL_CHAR) { 
           chss[i][j] = SPACE_CHAR; 
         } 
       } 
     } 
     return chss; 
   } 
  
   /** 
    *  
    * @param num 
    * @return 
    */ 
   private char[][] showLed(int num) { 
     boolean[] b = getLed(num); 
     char[][] chs = new char[ROW][COL]; 
     if (b[0]) 
       for (int i = 0; i  < COL; i++) 
         chs[0][i] = FILL_CHAR; 
     if (b[1]) 
       for (int i = 0; i  <= ROW / 2; i++) 
         chs[i][COL - 1] = FILL_CHAR; 
     if (b[2])