在java中，输入文字，放入一个二维字符数组

Question

我正在努力了解如何着手解决这个问题。我需要资源来帮助我更好地理解如何正确解决它，或者有人以另一种可能帮助我入门的方式来解释它。或者，如果有人可以给我一个起点或提供与此类似的代码示例。我对此很陌生，尽可能 "broke down" 需要它，这样我才能理解它的所有基本原理。

"Write a program that reads text from a file. Create a 2-dimensional character array that is 6 * 7. Store the characters read in your array in row major order (fill row 0 first, then row 1, etc.). Fill any unused spaces in the 2-D array with the ‘*’ character. If you have more characters than space, ignore the excess characters. Extract the characters from your array in column-major order (pull from column 0 first, then column 1, etc.). Build a new string as you extract the characters. Display the new string."

package programmingExercise5;

import java.util.Scanner;

public class twoDimensionalCharacterArray {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.print("Type in a sentence: ");
        String message = scan.nextLine();
    }

}

Answer 1

注意：这将用“*”填充字符 space，并用“-”填充 Array 2D 的剩余单元格。

public class twoDimensionalCharacterArray {

    public static void main(String[] args) {

        int row = 6, col = 7;
        char[][] chars = new char[row][col];

        Scanner scan = new Scanner(System.in);
        System.out.print("Type in a sentence: ");
        String message = scan.nextLine();
        char[] messages = message.toCharArray();
        int i = 0;
        for (int r = 0; r < chars.length; r++) {
            for (int c = 0; c < col; c++) {
                if (i < messages.length) {
                    chars[r][c] = messages[i] == ' ' ? '*' : messages[i];
                    i++;
                } else {
                    chars[r][c] = '-';
                }
            }
        }
        for (char[] x : chars) {
            System.out.println(Arrays.toString(x));
        }
    }

}

在java中，输入文字，放入一个二维字符数组

In java, input text and put them into a two Dimensional character array

java

arrays

string

java.util.scanner

type-2-dimension