HW机试字符串压缩java(1)

package huawei;

public class StringZip {

public static String stringZip(String a)
{
String ans ="";
if(a.equals(null))
{
return "error";

}
else
{

char [] b=a.toCharArray();
System.out.println(b.length+"the len of");

for(int i=0;i<b.length;i++)
{
int count=0;

while(i+count<b.length&&b[i+count]==b[i])
{
count++;

}
System.out.println(count+"--before---"+b[i]);
ans+=count+""+b[i];

i=i+count-1;
//System.out.println(b[i]+"--after--"+i);

//	ans+=count+b[i-1];

}

}
return ans;

}
public static void main(String[] s)
{
System.out.println(stringZip("hhhhellli"));

}

}