进制转换

class Binary 
{
	public static void main(String[] args) 
	{
		//转换成二进制
		trans(6,1,1);
		
		//转换成八进制
		trans(60,7,3);
		//转换成十六进制
		trans(60,15,4);
	}
	//十进制转换成二进制
     public static void toBinary(int num)
	{
		 StringBuffer result=new StringBuffer();
		 while(num>0)
		{
			 result.append(num%2);
			 num=num/2;
		 }
		 System.out.println(result.reverse());
	 }
	 //十进制转换成二进制(2)
	 public static void toBinary2(int num)
	{
		 char[] chs={'0','1'};
		 char[] result=new char[32];
		 int pos=result.length-1;
		 while(num!=0)
		{
			 int temp=num & 1;
			 result[pos--]=chs[temp];
			 num=num>>>1;
		 }
		 for(int i=pos+1;i<result.length;i++)
		{
			 System.out.print(result[i]+",");
		 }

	 }

	//十进制转换成十六进制(1)
	public static void toHex(int num)
	{
		StringBuffer result= new StringBuffer();
		for(int i=0;i<8;i++)
		{
          int temp=num & 15;
		  if((temp-10)>=0)
			{
			  result.append((char)(temp-10+'A'));
			}
		  else 
			{
			  result.append(temp);
			}
		   num=num>>4;
		}
		System.out.println(result.reverse());
	}
	//十进制转换成十六进制（2）
	public static void toHex2(int num)
	{
		char [] chs={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
		//StringBuffer result=new StringBuffer();
		//字符数组，不定义成整型数组
	    char [] result=new char[8]; 
		int pos=result.length-1;
		while(num!=0)
		{
		int temp=num&15;
		result[pos--]=chs[temp];
		num=num>>>4;
		}
	    for(int i=pos+1;i<result.length;i++)
	   //括号里面要是字符串才行。不能用单引号
	    System.out.print(result[i]+",");
	}
	//综合转换
	public static void trans(int num,int base,int offset)
	{
     if(num==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[] result=new char[32];
	  int pos=result.length-1;
	   while(num!=0)
		{
		  int temp=num&base;
		  result[pos--]=chs[temp];
		
		  num=num>>>offset;
	  }
	  for(int i=pos+1;i<result.length;i++)
		{
		  System.out.print(result[i]+",");
		  
	  }
	  System.out.println();


	}
}