java - 制作正方形网格时我缺少什么？

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创建一个程序，根据给定的行数和列数生成一组网格框。输入示例:行= 3 列= 4

示例输出:

 -  -  -  -  
| || || || |
 -  -  -  - 
 -  -  -  - 
| || || || |
 -  -  -  - 
 -  -  -  - 
| || || || |
 -  -  -  - 

我有这个:

import java.util.Scanner;

public class NewClass {
  static Scanner in = new Scanner(System.in); 
  static int row = 0; 
  static int col = 0;

  String[] square = { " -" + //"\n" + "| |" + //"\n" + " -" //"\n" };

  public static void main(String[] args) {
    NewClass nc = new NewClass();

    System.out.println("row:"); 
    row = in.nextInt(); 
    System.out.print("column:"); 
    col = in.nextInt();

    for (int i = 0; i < row; i++) { 
      nc.column(col); 
      System.out.println(); 
    }
  }

  public void column(int col) {
    for (int j = 0; j < col; j++) { 
      System.out.print(square[0]); 
    } 
  }
}

但是输出不正确。我错过了什么？

Answer 1

您可以使用两个嵌套的 for 循环来完成此操作。内部 for 循环打印列，外部 for 循环打印换行符以开始新行。

public static void main(String[] args)  {
    Scanner in = new Scanner(System.in); 
    int row = 0, col = 0; 
    System.out.println("row:"); row = in.nextInt(); System.out.print("column:"); col = in.nextInt();

    for (int i = 0; i < row; i++) { 
        for (int j = 0; j < col; j++) { 
            System.out.print(" - ");
        }
        System.out.print("\n");     
        for (int j = 0; j < col; j++) { 
            System.out.print("| |");
        }
        System.out.print("\n");     
        for (int j = 0; j < col; j++) { 
            System.out.print(" - ");
        }
        System.out.print("\n");     
    }
}

输入:行=3 列=4

输出:

 -  -  -  - 
| || || || |
 -  -  -  - 
 -  -  -  - 
| || || || |
 -  -  -  - 
 -  -  -  - 
| || || || |
 -  -  -  -