[英]Java: How to randomize an array list without duplicates
import java.util.Random;
public class Sudoku {
int[][] SquareNumbers = {
{ 4, 3, 5, 8, 7, 6, 1, 2, 9 }, { 8, 7, 6, 2, 1, 9, 3, 4, 5 }, { 2, 1, 9, 4, 3, 5, 7, 8, 6 },
{ 5, 2, 3, 6, 4, 7, 8, 9, 1 }, { 9, 8, 1, 5, 2, 3, 4, 6, 7 }, { 6, 4, 7, 9, 8, 1, 2, 5, 3 },
{ 7, 5, 4, 1, 6, 8, 9, 3, 2 }, { 3, 9, 2, 7, 5, 4, 6, 1, 8 }, { 1, 6, 8, 3, 9, 2, 5, 7, 4 } };
Random Digits = new Random(); // random numbers to exchange Rows
Random HiddenNumbers = new Random();
int Grid[][] = new int[9][9];
public int[][] Generator() {
for (int x = 0; x < Digits.nextInt(); x++) {
for (int da = 0; da < 3; da++) {
}
}
return SquareNumbers;
}
int[][] Hide() {
for (int i = 0; i < 9; i++)
for (int j = 0; j < 9; j++)
Grid[i][j] = SquareNumbers[i][j];
int Row, Columns, Concealer;
Concealer = 55 + Digits.nextInt(1);
for (int i = 0; i < Concealer; i++) {
Row = HiddenNumbers.nextInt(9);
Columns = HiddenNumbers.nextInt(9);
Grid[Row][Columns] = -1;
}
return Grid;
}
public int[][] getSquareNumbers() {
return SquareNumbers;
}
public void setSquareNumbers(int[][] SquareNumbers) {
this.SquareNumbers = SquareNumbers;
}
private static Sudoku instance = null;
protected Sudoku() {
// Exists only to defeat instantiation.
}
public static Sudoku getInstance() {
if (instance == null) {
instance = new Sudoku();
}
return instance;
}
}
有沒有辦法隨機化它而不是雙數組列表,使其像數獨游戲一樣工作? 因為它在列或行內沒有重復項,並且每三乘三較小的網格使用一個數字一次?
生成隨機數獨謎題的一種方法如下:
雖然這些看起來像是不同的謎題,但實際上它們都是各向同性的拉丁方格(即所有等價的,因為它們可以通過重新排序行/列來減少到相同的謎題)。
如果你想要一個更隨機的解決方案,這可能已經在這里回答: https : //stackoverflow.com/a/6964044/2471910
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