char ch = 'A';
int i10 = (int)ch;
String i16 = Integer.toHexString(i10);
System.out.println("10进制:"+i10);
System.out.println("16进制:"+i16);
int i10 = (int)ch;
String i16 = Integer.toHexString(i10);
System.out.println("10进制:"+i10);
System.out.println("16进制:"+i16);
int i10 = (int)ch;
String i16 = Integer.toHexString(i10);
string 转换成char 不就行了