Java：进制转换

public class ToBinTest2
{  
    
    //十进制>>>>>二进制 
    public static void toBin(int n)
    {
      trans(n,1,1);
    }


    //十进制>>>>>十六进制 
    public static void toHex(int n)
    {
      trans(n,15,4);
    }


    //十进制>>>>>八进制 
    public static void toOtc(int n)
    {
      trans(n,7,3);
    }


    //转换过程
    public static void trans(int x,int base,int offset)
    {   
        if(x==0)
        {
            System.out.print(0);
            return;
        }
        char[] chs = {‘0‘,‘1‘,‘2‘,‘3‘,‘4‘,‘5‘,‘6‘,‘7‘,‘8‘,‘9‘,‘A‘,‘B‘,‘C‘,‘D‘,‘E‘,‘F‘};
        char[] arr = new char[32];    //定义一个临时的存储容器，（一个整型数据占四个八位)
        int pos = arr.length;        //定义一个指针移动
        while(x!=0)                                     
        {
          int temp = x & base;
          arr[--pos] = chs[temp];
              x = x >>> offset;
        }
         for(int i = pos; i <arr.length; i++)
         {
              System.out.print(arr[i]);
         }
              System.out.println();
    }

    //主函数测试
    public static void main(String[] args)
    {
       int num;
       java.util.Scanner sc = new java.util.Scanner(System.in);
       System.out.print("please enter a integer number:");
       num = sc.nextInt();
       toBin(num);
       toHex(num);
       toOtc(num);
    }

}