从文本文件创建2D数组

huangapple
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英文:

2D array from a text file

问题

  1. import java.io.File;
  2. import java.io.FileNotFoundException;
  3. import java.util.Scanner;
  5. public class DoubleArray {
  6.     public static void main(String args[]) throws FileNotFoundException {
  7.         Scanner sr = new Scanner(new File("C:\\Users\\Colton\\eclipseworkspace\\DoubleArray\\text.txt"));
  8.         {
  9.             int a = 6;
  10.             int b = 7;
  12.             int[][] storyGrid = new int[a][b];
  14.             sr.nextInt();
  15.             for (int i = 0; i < a; i++) {
  16.                 for (int j = 0; j < b; j++) {
  17.                     storyGrid[i][j] = sr.nextInt();
  18.                     System.out.print(storyGrid[i][j]);
  19.                 }
  20.             }
  21.         }
  22.     }
  23. }
英文:

I have been trying to get this figured out. When I am putting in the code, I am getting an error from the storyGrid = sr.nextInt();

  1. import java.io.File;
  2. import java.io.FileNotFoundException;
  3. import java.util.Scanner;
  4. public class DoubleArray {
  5.     public static void main(String args[]) throws FileNotFoundException {
  6.         Scanner sr = new Scanner(new
  7.             File(&quot;C:\\Users\\Colton\\eclipseworkspace\\DoubleArray\\text.txt&quot;));
  8.         {
  9.             int a = 6;
  10.             int b = 7;
  12.             int[][] storyGrid = new int[a][b];
  14.             sr.nextInt();
  15.             for (int i = 0; i &lt; a; i++) {
  16.                 for (int j = 0; j &lt; b; j++) {
  17.                     storyGrid = sr.nextInt();
  18.                     System.out.print(storyGrid[i][j]);
  19.                 }
  20.             }
  21.         }
  22.     }
  23. }
  25. </details>
  28. # 答案1
  29. **得分**: 1
  31. 你必须对要赋值的数组进行索引，以便为该数组中的元素赋值，示例：
  32. ```java
  33. int[][] storyGrid = new int[a][b];
  35. sr.nextInt();
  36. for (int i = 0; i < a; i++) {
  37.     for (int j = 0; j < b; j++) {
  38.         storyGrid[i][j] = sr.nextInt();

另外，请查看Java 数组教程。

英文:

You have to index the array you are referencing to assign a value to an element in that array, example:

  1. int[][] storyGrid = new int[a][b];
  3. sr.nextInt();
  4. for (int i = 0; i &lt; a; i++) {
  5.     for (int j = 0; j &lt; b; j++) {
  6.         storyGrid[i][j] = sr.nextInt();

Also checkout the java arrays tutorial

答案2

得分: 0

错误出在你的循环中，你试图直接将sr.NextInt()的值赋给一个数组类型，但我认为你想要赋值给矩阵的实际索引，所以只需将storyGrid = sr.nextInt();更改为：

  1. storyGrid[i][j] = sr.nextInt();

我建议你查看一下这个关于数组的指南。

英文:

The error it's in your foor loop, your trying to assign the value of sr.NextInt() directly to an Array type, when I think you want to assign to the actual index of the Matrix so just change storyGrid = sr.nextInt(); to:

  1. storyGrid[i][j] = sr.nextInt();

I can suggest you to take a look to this guide about arrays.

huangapple
  • 本文由 发表于 2020年8月31日 01:49:49
  • 转载请务必保留本文链接：https://go.coder-hub.com/63660408.html
  • arrays
  • java
  • multidimensional-array
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