java - 类文件错误 : "Identifier expected"

Question

这是我用于项目的类文件的当前代码，我在 public double highStoreSales(store) 和 public doubleaverageStoreSales(quarter) 行上收到两个标识符预期错误

我错过了什么？

import java.io.File;
import java.text.DecimalFormat;
import java.util.Scanner;
import java.io.IOException;
import java.util.*;
import javax.swing.*;
import java.awt.*;

public class SalesAnaylzer //extends SalesManager
{

    DecimalFormat pricePattern = new DecimalFormat("$#0.00");
    int[][] sales = new int[3][4];


    public SalesAnaylzer(String fileName) throws IOException {

        File inputFile = new File(fileName);
        Scanner scan = new Scanner(inputFile);
        for (int row = 0; row < 4; row++) {
            for (int col = 0; col < 6; col++) {
                sales[row][col] = scan.nextInt();
            }
        }
    }

    public String toString() {
        String data = "";
        for (int row = 0; row < 4; row++) {
            data = data + "\nStore " + (row + 1) + ": ";
            for (int col = 0; col < 6; col++) {
                data = data + "QTR " + (col + 1) + ": " + pricePattern.format(sales[row][col]) + " ";
            }
        }
        return data;
    }

    public double totalSales() {
        double total = 0.0;
        for (int row = 0; row < 4; row++) {
            for (int col = 0; col < 6; col++) {
                total = total + sales[row][col];
            }
        }
        return total;
    }

    public double highStoreSales(store) {
        double highest = 0.0;
        for (int row = 0; row < 4; row++) {
            if (sales[row][store] > highest)
                highest = sales[row][store];
        }
        return pricePattern.format(highest);
    }

    public double averageStoreSales(quarter) {
        double total = 0.0;
        double avg = 0.0;
        for (int col = 0; col < 6; col++) {
            total = total + sales[quarter][col];
        }
        avg = (total / 4);
        return pricePattern.format(avg);
    }
}

Answer 1

您的参数名称没有类型，例如:

public double averageStoreSales(quarter)

您需要说明quarter是什么类型，例如:

public double averageStoreSales(int quarter)
// -----------------------------^