Java基础小常识 - 任意进制转换

本文提供了一个Java程序示例，展示了如何手动实现十进制数到二进制、八进制及十六进制的转换，并使用了Java内置的方法进行对比验证。

package www.jwb.day04;

public class To_Hex
{
   public static void main(String[] args)
   {
       toBinary(60);
       toOctal(60);
       toHex(60);

　　//调用系统实现任意进制转换
       System.out.println(Integer.toBinaryString(60));
       System.out.println(Integer.toOctalString(60));
       System.out.println(Integer.toHexString(60));
   }

   //二进制
   public static void toBinary(int num)
   {
       trans(num,1,1);
   }
   //八进制
   public static void toOctal(int num)
   {
       trans(num,7,3);
   }
   //十六进制
   public static void toHex(int num)
   {
       trans(num,15,4);
   }
   public static void trans(int num,int base,int offset)
   {
       if(num == 0 )
       {
           System.out.println("0");
           return ;
       }
       char[] chs = new char[]{'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
       char[] arr = new char[32];
       int pos = arr.length;
       while(num!=0)
       {
           int temp = num & base;
           arr[--pos] = chs[temp];
           num = num >>> offset;
       }
       for(int j=pos;j<arr.length;j++)
       {
           System.out.print(arr[j]);
       }
       System.out.print("\n");
   }

}