谁能告诉我如何编写一个程序，其中我必须从文本文件中读取ac程序，然后计算if-else语句的数量，但不包括嵌套的if-
else。在此程序中，我已经计算了文本文件中if和else的数量，但是如何从此计数中排除嵌套的if？请帮助我。

package softwaretesting;

import java.io.*;
import java.util.Scanner;

public class SoftwareTesting {

public static void main(String[] args) throws IOException {
    int countIf = 0, countElse = 0;

    Scanner input;
    input = new Scanner(System.in);
    String fileName;
    System.out.println("Enter the path of the file from which no of if and else statements are to be counted");

    fileName = input.next();


    Scanner file;
    file = new Scanner(new File(fileName));

    int count=0;
    while (file.hasNextLine())
    {
        String line = file.nextLine();
        if (line.indexOf("if") != -1 && count%2==0 )
        {   
            countIf++;
        }


        if (line.indexOf("else") != -1  )
        {
            countElse++;
        }


    }


    {
        System.out.println("No of If statements: " + countIf);
        System.out.println("No of Else statements: " + countElse);
    }
}
}