將for循環中的值分配給整數數組列表

Question

在我的代碼的這一階段，我嘗試打印一個8x8的數字網格，其隨機范圍是1-8。 我正在努力將填充數組列表中的值分配給兩個for循環中的隨機數。 我該如何解決。

這是我的代碼：

import java.util.*;   // for Arraylist
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
public class Game {
static Scanner in = new Scanner(System.in); 
        int a1, a2, a3, a4, a5, a6, a7, a8;
        int b1 ,b2 ,b3 ,b4 ,b5 ,b6 ,b7 ,b8;
        int c1 ,c2 ,c3 ,c4 ,c5 ,c6 ,c7 ,c8;
        int d1 ,d2 ,d3 ,d4 ,d5 ,d6 ,d7 ,d8;
        int e1 ,e2 ,e3 ,e4 ,e5 ,e6 ,e7 ,e8;
        int f1 ,f2 ,f3 ,f4 ,f5 ,f6 ,f7 ,f8;
        int g1 ,g2 ,g3 ,g4 ,g5 ,g6 ,g7 ,g8;
        int h1 ,h2 ,h3 ,h4 ,h5 ,h6 ,h7 ,h8;
    public int fill(ArrayList<Integer>ar) {
        gui();
        int[] space = new int[] {a1, a2 ,a3 ,a4 ,a5 ,a6 ,a7 ,a8 ,
                                     b1 ,b2 ,b3 ,b4 ,b5 ,b6 ,b7 ,b8 ,
                                     c1 ,c2 ,c3 ,c4 ,c5 ,c6 ,c7 ,c8 ,
                                     d1 ,d2 ,d3 ,d4 ,d5 ,d6 ,d7 ,d8 ,
                                     e1 ,e2 ,e3 ,e4 ,e5 ,e6 ,e7 ,e8 ,
                                     f1 ,f2 ,f3 ,f4 ,f5 ,f6 ,f7 ,f8 ,
                                     g1 ,g2 ,g3 ,g4 ,g5 ,g6 ,g7 ,g8 ,
                                     h1 ,h2 ,h3 ,h4 ,h5 ,h6 ,h7 ,h8 }; }
public void gui()
 {System.out.println(a1+" "+a2+" "+a3+" "+a4+" "+a5+" "+a6+" "+a7+" "+a8);
  System.out.println(b1+" "+b2+" "+b3+" "+b4+" "+b5+" "+b6+" "+b7+" "+b8);
  System.out.println(c1+" "+c2+" "+c3+" "+c4+" "+c5+" "+c6+" "+c7+" "+c8);
  System.out.println(d1+" "+d2+" "+d3+" "+d4+" "+d5+" "+d6+" "+d7+" "+d8);
  System.out.println(e1+" "+e2+" "+e3+" "+e4+" "+e5+" "+e6+" "+e7+" "+e8);
  System.out.println(f1+" "+f2+" "+f3+" "+f4+" "+f5+" "+f6+" "+f7+" "+f8);
  System.out.println(g1+" "+g2+" "+g3+" "+g4+" "+g5+" "+g6+" "+g7+" "+g8);
  System.out.println(h1+" "+h2+" "+h3+" "+h4+" "+h5+" "+h6+" "+h7+" "+h8);
}
public  double num(ArrayList<String>ar){
int[] randomNumbers = new int[64];
 for (int index = 0; index < ar.size(); index++)
     {
         randomNumbers[ index ] = (int) ( Math.random()*8 );
         }
         for (int index = 0; index < ar.size(); index++)
     {
         randomNumbers[ index ] = (int) ( Math.random()*8 );
         randomNumbers[ index ] =  system.out.println(space[index++]);
        }
   }
  }

Answer 1

看起來您的int []空間數組是在fill方法中聲明的，因此不在該方法范圍之外。

如果您希望它在范圍內，請考慮將int []空間聲明為類的字段，如果願意，可以在fill方法中對其進行初始化。