java十进制转十六进制

package com.ds.detect;

import java.util.Scanner;

public class ToHEX{

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        System.out.println("请出入一个十进制数");

        int num = sc.nextInt();

        toHex(num);

        System.out.println("输入数字的16进制结果是："+Integer.toHexString(num));// java自带的转换十六进制方法

        sc.close();

    }

    public static void toHex(int num) {

        if (num == 0) {

            System.out.println('0');

            return;

        }

        char[] chs = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A','B', 'C', 'D', 'E', 'F'};

        char[] arr = new char[8];

        int pos = arr.length;

        while (num != 0) {

            arr[--pos] = chs[num & 15];

            num = num >>> 4;

        }

        for (int i = pos; i < arr.length; i++) {

            System.out.print(arr[i]);

        }

    }

}