Asc码与字符互相转化

 public class Jm1 {  
     private static int asnum;  
     private static char stchar;  
   
     public static void main(String[] args) {  
         System.out.println(getAsc("A"));  
         System.out.println(backchar(99));  
     }  
   
     /** 
      * 字符转ASC 
      *  
      * @param st 
      * @return 
      */  
     public static int getAsc(String st) {  
         byte[] gc = st.getBytes();  
         asnum = (int) gc[0];  
         return asnum;  
     }  
   
     /** 
      * ASC转字符 
      *  
      * @param backnum 
      * @return 
      */  
     public static char backchar(int backnum) {  
         stchar = (char) backnum;  
         return stchar;  
     }  
 }