题解 | #压缩字符串(一)#

public String compressString (String param) {
    StringBuilder sb = new StringBuilder();
    int index = 0;
    while(index<param.length()) {
    	int count = 1;
    	char tmp = param.charAt(index);
    	sb.append(tmp);
    	while(index+1<param.length() && param.charAt(index+1)==tmp) {
            count++;
    		index++;
    	}
        if(count!=1) {
    		sb.append(count);
    	}
    	index++;
    }
    return sb.toString();
}