小白求助，java简化代码问题

    public void UseProcessSum() throws IOException {
    sc = Output.getWorkbook();
    XSSFSheet readsheet = readWorkbook();
    for (; i <= lastnum; i++) {
        System.out.println("getsum");
        XSSFRow readrow = readsheet.getRow(i);// 获取输入行
        ProcessRow p = new ProcessRow();
        if (p.panduan2(readrow)) {
            System.out.println(p.panduan2(readrow));
            date1.add(sumArray(readrow));
            value1.add(Double.parseDouble(readrow.getCell(
                    Integer.parseInt(ProcessRow.source.getProperty("求和列")) - 1)
                    .toString()));
        }
    }
    double sum = 0;
    double a = 0;
    for (int c = 0; c < date1.size(); c++) {
        try {
            if (date1.get(c).equals(date1.get(c + 1))) {
                a = value1.get(c);
                sum = a + sum;
            } else {
                a = value1.get(c);
                sum = a + sum;
                date2.add(date1.get(c));
                value2.add(sum);
                sum = 0.0;
            }
        } catch (Exception e) {
            a = value1.get(c);
            sum = a + sum;
            date2.add(date1.get(c));
            value2.add(sum);
        }
    }
    for (int k = 0; k < date2.size(); k++) {
        ProcessRow p = new ProcessRow();
        XSSFSheet sheet = sc.getSheetAt(0);
        XSSFRow outputrow = sheet.createRow(j++);
        outputrow.createCell(14).setCellValue(value2.get(k));
        outputrow.createCell(3).setCellValue(date2.get(k));
        outputrow.createCell(4).setCellValue(date2.get(k));
        p.processGG(outputrow);
        p.processAlie(outputrow);
        p.processZhai2(outputrow);
    }
    sc.write(Output.init());
    sc.close();
}

有很多个这样的求和方法，他们之间就if (p.panduan2(readrow))这句不一样，我怎么写成一个方法呢，我想把(p.panduan2(readrow)当参数传进去，可是readrow是方法里的

 编写一个接口
interface IPanduan
{
    Boolean panduan(XSSFRow row);
}

将这个接口作为参数
void foo( IPanduan ipd)
{
...
ProcessRow p = new ProcessRow();
        if (ipd(readrow) {
            System.out.println(p.panduan2(readrow));
...
}

调用
IPanduan pd = new  IPanduan() {
Boolean panduan(XSSFRow row) {
 ...
}};
foo(pd);