静态方法不能在非静态上下文中运行

Question

[我正在尝试通过使用各种方法来掷骰子，比较并总结骰子来模拟Yahtzee游戏。

这是一项作业，我需要使用这三种静态方法来完成所有工作。

[当我尝试运行代码但是遇到此错误时

exit status 1
Main.java:6: error: non-static method rollDice(int[]) cannot be referenced from a static context
   rollDice(dice);
   ^
Main.java:7: error: non-static method rollDice(int[]) cannot be referenced from a static context
   dice= rollDice(dice);
         ^
2 errors  

我曾尝试运行这些方法，然后再将其赋值给变量，但这似乎不起作用。这是我完整的代码：

class Main {
  public static void main(String[] args) {
  // int array to hold 5 dice

   int dice[] = new int[5];
   rollDice(dice);
   dice= rollDice(dice);

   fiveOfaKind(dice);
   int points = fiveOfaKind(dice);

   getChance(dice,points);
   int printpoint = getChance(dice,points);
   // You may roll the dice up to 3 times to try to get 5 of a Kind 
   // If you get 5 of a Kind, stop if not keep trying.
   // If you do not get 5 of a Kind after the 3rd roll, you must take the 
   // CHANCE score. 

   System.out.println("Your score is " + printpoint);



  }// end of main method

  public int[] rollDice(int dice[]){
    // generate 5 random numbers / update dice array
     for (int i = 0; i < dice.length; i++) {
      dice[i] = (int)(Math.random() * 6 + 1);
     }
    return dice;

  }// end of rollDice - rolls 5 dice and puts them in an array
   // All 5 dice must be rolled each time

  public static int fiveOfaKind(int dice[]){
     int pts = 0;
     int rNum=0;

    for(int i=0; rNum<3; rNum++){
    if(dice[0]==dice[1]&&dice[1]==dice[2]&&dice[2]==dice[3]&&dice[3]==dice[4]&&dice[4]==dice[5]&&dice[5]==dice[6]){
      pts=50;
    }
    else if(rNum==3){
      pts=0;
    }
    else{
      int[] rollDice;
    }

    }//end of forloop

    // use Array dice - evaluate if all elements are equal
    // if true = pts = 50
    // if false - pts = 0


    return pts;

  }// end of fiveOfaKind - evaluates the dice roll to see if all 5 are equal
   // Returns 50 points if they do

  public static int getChance(int dice[], int points){

    if(points<50){
       points=0;
      for (int i = 0; i < dice.length; i++) {
         points+=dice[i];
      }
    }
    // use Array dice - sum the elements of the Array
    // pys = calculated value of the sum

    int p = points;

    return p;

  }// end of getChance - adds the total value of the dice
    // Returns the total points calculated


}// end of  class

Answer 1

您需要将rollDice()方法设置为静态。非静态方法不能从静态方法中调用。如果要调用非静态方法，则必须使用类的实例来调用该方法。