java十进制转换成十六进制--解决输出的字母转换成大写

import java.util.*;

public class Main {
		
	public static void main(String args[]) {
		Scanner in = new Scanner(System.in);
		long a10 = in.nextLong();
		String str16 = Long.toHexString(a10).toUpperCase();
		System.out.println(str16);
		in.close();
		
	}	
}