class  numChange{
public static void main(String[] args){
toBin();
toHex();
toOct();
}
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 pos=arr.length;
while(num!=0){
int temp=num&base;
arr[--pos]=chs[temp];
num=num>>>offset;}
for(int x=pos;x<arr.length;x++)
{system.out.print(arr[x]);
public static void toBin(int num)
{trans(num,1,1);}
public static void toHex(int num)
{
trans(num,15,4);
}
public static void toOct(int num)
{
trans(num,7,3);
}
请各位大神对代码进行指点

class  numChange{
public static void main(String[] args){
toBin();
toHex();
toOct();
}
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 pos=arr.length;
while(num!=0){
int temp=num&base;
arr[--pos]=chs[temp];
num=num>>>offset;}
for(int x=pos;x<arr.length;x++)
{system.out.print(arr[x]);
public static void toBin(int num)
{trans(num,1,1);}
public static void toHex(int num)
{
trans(num,15,4);
}
public static void toOct(int num)
{
trans(num,7,3);
}
请各位大神对代码进行指点