Corresponding conversion between char and number

package main;
 
/**
 * Convert a character to the corresponding Ascii code in Java
 * 1 byte = 8bit can represent 0-127
 */
public class GetCharAscii { /*0-9 corresponds to Ascii 48-57      *AZ 65-90      * az 97-122      *No. 33～126 (94 in total) are characters, of which No. 48～57 are 0～9 ten Arabic numerals      */     public static void main(String[] args) {         // TODO Auto- generated method stub         System.out.println(charToByteAscii('9'));         System.out.println(byteAsciiToChar(57));         System.out.println(SumStrAscii("19"));         System.out.println(SumStrAscii ("一"));     }     /**      * Method 1: Cast char to byte      * @param ch      * @return
 
    






 





 




     */
    public static byte charToByteAscii(char ch){         byte byteAscii = (byte)ch;         return byteAscii;     }     /**      * Method 2: Convert char directly to int, and its value is the ascii of the character      * @param ch      * @return      */     public static byte charToByteAscii2(char ch){         byte byteAscii = (byte)ch;         return byteAscii;     }     /**      * In the same way, ascii is converted to char and directly int is forcibly converted to char      * @param ascii      * @return      */     public static char byteAsciiToChar(int ascii){         char ch = (char)ascii;         return ch;     }     /**

        









        












     * Find the ASCII value of the string and
     * Note that if there is Chinese, a Chinese character will be represented by two bytes, and its value is a negative number
     */
    public static int SumStrAscii(String str){         byte[] bytestr = str. getBytes();         int sum = 0;         for(int i=0;i<bytestr.length;i++){             sum += bytestr[i];         }         return sum;     } }