首先,感谢您的到来并花时间帮助解决问题。
我是一个完整的菜鸟(第 3 天编程),这解释了为什么我花了无数令人头疼的时间试图解决这个问题,但仍然没有弄清楚:
问题:如何扫描由字符串(* 和 _)组成的 .txt 文件并将其转换为布尔数组(即 * = true 和 _ = false)(以及如何打印出来?我是猜测我们也需要一个双循环)?扫描仪似乎无法在主要方法中工作,并且出现“没有此类文件”错误。
额外问题:您如何迭代网格(例如使用 for 循环)以使新网格替换旧网格并且最新网格不间断地成为新网格?我不熟悉“show()”方法,但我有点让它工作。
这是我的不完整代码,可让您了解问题:
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Scanner;
public class GameOfLife {
public static boolean[][] gen() throws IOException {
Scanner scanner = new Scanner(new File("seed.txt"));
int rows = 0, columns = 0;
while (scanner.hasNextLine()) {
String s = scanner.nextLine();
if (s.length() > columns)
columns = s.length();
rows++;
}
boolean[][] grid = new boolean[rows][columns + 1];
Scanner scanner1 = new Scanner(new File("seed.txt"));
String line;
for (int r = 0; r < rows; r++) {
line = scanner1.nextLine();
System.out.println(line);
for (int c = 0; c <= line.length(); c++) {
if (r == line.length()) {
break;
}
if(line.charAt(r) == '*') {
grid[r][c] = true;
}
}
}
return grid;
}
public static boolean[][] nextGen(boolean[][] cells){
boolean[][] newCells = new boolean[cells.length][cells[0].length];
int num;
for(int r = 0; r < cells.length; r++){
for(int c = 0; c < cells[0].length; c++){
num = numNeighbours(cells, r, c);
if (occupiedNext(num, cells[r][c]))
newCells[r][c] = true;
}
}
return newCells;
}
public static void main(String[] args) throws IOException{
boolean[][] cells = gen();
show(cells);
cells = nextGen(cells);
show(cells);
Scanner scanner2 = new Scanner(new File("seed.txt"));
while(scanner2.nextLine().length() != 0){
cells = nextGen(cells);
show(cells);
}
}
private static boolean inbounds(boolean[][] cells, int r, int c) {
return r >= 0 && r < cells.length && c >= 0 &&
c < cells[0].length;
}
private static int numNeighbours(boolean[][] cells, int row, int col) {
int num = cells[row][col] ? -1 : 0;
for (int r = row - 1; r <= row + 1; r++)
for(int c = col - 1; c <= col + 1; c++)
if (inbounds(cells, r, c) && cells[r][c] )
num++;
return num;
}
public static void show(boolean[][] grid){
String s = "";
for(boolean[] row : grid){
for(boolean val : row)
if(val)
s += "*";
else
s += "_";
s += "\n";
}
System.out.println(s);
}
public static boolean occupiedNext(int numNeighbours, boolean occupied){
if (occupied && (numNeighbours == 2 || numNeighbours == 3))
return true;
else if (!occupied && numNeighbours == 3)
return true;
else
return false;
}
}