Question

早安绅士，

我在为另一个项目转换一些代码时遇到了一个问题，并希望得到一些帮助。在'readFile'方法中，我试图在读取文件时将String解析为整数。但是，它给了我错误'array found，但int required'

感谢任何帮助，

祝你好运麦克

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


public class JavaApplication1 
{
static int [] matrix = new int [10];
static Scanner input = new Scanner(System.in);

public static void main(String[] args) throws IOException
{
   String fileName = "Integers.txt";

   // read the file
   readFile(fileName);

   // print the matrix
   printArray(fileName, matrix);


}


// Read File
        public static void readFile(String fileName) throws IOException
        {
            String line = "";

            FileInputStream inputStream = new FileInputStream(fileName);
            Scanner scanner = new Scanner(inputStream);
            DataInputStream in = new DataInputStream(inputStream);
            BufferedReader bf = new BufferedReader(new InputStreamReader(in));

            int lineCount = 0;
            String[] numbers;
            while ((line = bf.readLine()) != null)
            {
                numbers = line.split(" ");
                for (int i = 0; i < 10; i++)
                {
                matrix[lineCount][i] = Integer.parseInt(numbers[i]);
                }
                lineCount++;
            }
            bf.close();
        }

    public static void printToFile(String fileName, String output) throws IOException
{
    java.io.File file = new java.io.File(fileName);
    try (PrintWriter writer = new PrintWriter(file)) 
    {
        writer.print(output);
    }
}

    public static void printArray(String fileName, int [] array)
        {
            System.out.println("The matrix is:");

             for (int i = 0; i < 10; i++)
                {
                    System.out.println();
                }
             System.out.println();
         }



}

Answer 1

matrix是一个int类型的数组，这意味着matrix[lineCount]是一个int。

你正在尝试做matrix[lineCount][i]，它正在获得int的位置。这就是你得到这个错误的原因。

我猜您希望矩阵为int[][] matrix = new int[10][10];

Answer 2

matrix[lineCount][i] = Integer.parseInt(numbers[i]);

错了。

应该是

matrix[lineCount]= Integer.parseInt(numbers[i]);

OR

matrix[i]= Integer.parseInt(numbers[i]);

数组必需，但找到Int

2 个答案: