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"));

	}

}