private String createOutString(String apkName, String apkName2,
            int ilen, int jlen, double jaccardSim, boolean sameCerts) {
        StringBuilder strBuilder = new StringBuilder();
        strBuilder.append(apkName).append(",");
        strBuilder.append(apkName2).append(",");
        strBuilder.append(ilen).append(",");
        strBuilder.append(jlen).append(",");
        DecimalFormat df = new DecimalFormat("0.00000000");
        strBuilder.append(df.format(jaccardSim)).append(",");
        strBuilder.append(sameCerts ? "same" : "diff");
        return strBuilder.toString();
    }