java 检测字符串并替换成*显示

public class StringDetectionUtil {

    /**
     * 检测并替换字符串  用*代替
     * @param content 需要检测的文本
     * @param badString 脏话 关键字 对比的字符串数组
     * @return
     */
    public static String detection(String content,String[] badString){
        try {
            for (int i = 0; i <badString.length ; i++) {
                content= index(content,badString[i]);
            }
            return content;
        }catch (Exception e){
            Log.e("StringDetectionUtil",e.getMessage());
            return "";
        }

    }

    private static String index(String content,String badString){
        if(content.equals("")||badString.equals("")){
            return content;
        }
        int index=content.indexOf(badString);
        String newString="";
        if(index!=-1){
            String newString1=content.substring(0,index);
            String newString2=content.substring(index+badString.length());
            String hindString="";
            for (int i = 0; i <badString.length() ; i++) {
                hindString=hindString+"*";
            }
            newString=newString1+hindString+newString2;
            return index(newString,badString);
        }
        return content;
    }
}