算法：十进制转换为十六进制，二进制，八进制

class NumberConvert
{
public static void main(String[] args)
{
toHex(60);
}

/**
十进制转换为二进制
*/
public static void toBin(int num){
trans(num,1,1);
}
/**
十进制转换为八进制
*/
public static void toOct(int num){
trans(num,7,3);
}
/**
十进制转换为十六进制
*/
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={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
char []arr=new char[32];
int pose=arr.length;
while(num!=0)
{
int temp=num&base;
arr[--pose]=chs[temp];

num=num>>>offset;}
for(int x=pose;x<arr.length;x++)
{
System.out.print(arr[x]);
}

}

}