题解 | #压缩字符串(一)#

import java.util.*;


public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param param string字符串 
     * @return string字符串
     */
    public String compressString (String param) {
        // write code here
        if(param.length() == 0){
            return "";
        }
        char[] c = param.toCharArray();
        int count = 1;
        StringBuffer sb = new StringBuffer();
        for(int i = 0;i < c.length - 1;i++){
            if(c[i] == c[i+1]){
                count++;
            }else{
                sb.append(c[i]);
                if(count > 1){
                    sb.append(count);
                }
                count = 1;
            }
        }
        sb.append(c[c.length - 1]);
        if(count > 1){
            sb.append(count);
        }
        return sb.toString();
    }
}