我应该如何以及在何处添加要运行的主方法

Question

所以我觉得代码已经完成并准备好运行，但我在基础知识方面遇到了问题，完全忘记了将主方法放在哪里以及在其中放什么。我的类叫做"Cell"，里面有一些方法之类的，现在我想运行它，对不起，如果我没有给出足够的细节，希望你们都能理解。法典：

public class Cell {
//We need an array for the cells and one for the rules.
  public int[] cells = new int[9];
  public int[] ruleset = {0,1,0,1,1,0,1,0};



  //Compute the next generation.
public void generate() 
{
//All cells start with state 0, except the center cell has state 1.
    for (int i = 0; i < cells.length; i++)
    {
      cells[i] = 0;
    }
    cells[cells.length/2] = 1;

    int[] nextgen = new int[cells.length];
    for (int i = 1; i < cells.length-1; i++)
    {
      int left   = cells[i-1];
      int me     = cells[i];
      int right  = cells[i+1];
      nextgen[i] = rules(left, me, right);
    }
    cells = nextgen;
}
//Look up a new state from the ruleset.
  public int rules (int a, int b, int c)
  {
      if      (a == 1 && b == 1 && c == 1) return ruleset[0];
        else if (a == 1 && b == 1 && c == 0) return ruleset[1];
        else if (a == 1 && b == 0 && c == 1) return ruleset[2];
        else if (a == 1 && b == 0 && c == 0) return ruleset[3];
        else if (a == 0 && b == 1 && c == 1) return ruleset[4];
        else if (a == 0 && b == 1 && c == 0) return ruleset[5];
        else if (a == 0 && b == 0 && c == 1) return ruleset[6];
        else if (a == 0 && b == 0 && c == 0) return ruleset[7];

        return 0;
  }{

}
}

Answer 1

非常简单

public static void main(String[] args)
{
Cell cell = new Cell();
cell.generate();
}

将其添加到 Cell 类本身中

Answer 2

您可以在类声明中的任何位置编写 main 方法：

//this is your class declaration for class Cell!
public class Cell {
  //We need an array for the cells and one for the rules.
  public int[] cells = new int[9];
  public int[] ruleset = {0,1,0,1,1,0,1,0};

  //You can write main method here!

  //Compute the next generation.
  public void generate() 
  {
    //code
  }

  //Or you can write main method here!

  //Look up a new state from the ruleset.
  public int rules (int a, int b, int c)
  {
    //code
  }

  //Or, heck, you can write main method here:
  public static void main(String args[])
  {
    //sample code:
    Cell cell = new Cell();
    cell.generate();
    //loop through updated array list.
    for(int i = 0; i<cell.cells.length; i++)
    {
        System.out.println("cells[" + i + "]:  " + cell.cells[i]);
    }
    System.out.println("main method complete!");
  }

}

您还可以创建一个完整的其他类，并在其中创建一个 main 方法来使用您编写的这个 Cell 类。

注意：您在代码末尾附近有一个括号错误，我在这里修复了该错误。