字符串的压缩（面试题）

package com.util.algorithm;

public class ZipString {

/**
* @param args
*/
public static void getZip(String str){
int pos = 0, count;
char[] chs = str.toCharArray();
char temp;
StringBuffer sb = new StringBuffer();
for(int i=0;i<chs.length-1;i=pos+1){
temp = chs[i];
pos = i;
count = 1;
while(pos<chs.length-1 && chs[pos]==chs[pos+1]){
//这里的有点需要注意，pos一定不能超出长度，小心
count++;
pos++;
}
if(count>1){
sb.append(count);
sb.append(temp);
}else{
sb.append(temp);
}
}
System.out.println(sb.toString());
}
public static void main(String[] args) {
String s = "wwwabcss";
getZip(s);
}
}