字符转对应ASCII码
// 方法一：将char强制转换为byte char ch = ‘A‘; byte byteAscii = (byte) ch; System.out.println(byteAscii); // 方法二：将char直接转化为int，其值就是字符的ascii int byteAscii1 = (int) ch; System.out.println(byteAscii1);
ASCII码转字符
// 直接int强制转换为char int ascii = 65; char ch1 = (char)ascii; System.out.println(ch1);