Java:掷骰子和输出

Question

我尝试掷骰子，然后当我在 Player 类中调用 slaTarningar() 时系统打印 1 个骰子，

class Player{
    int armees = 0;
    int diceAmount = 0;
    Dice Dices[];
    Player(String playerType){
        armees = 10;
        diceAmount = ("A".equals(playerType)) ? 3 : 2;
        Dices= new Dice[diceAmount];
        for(int i=0;i<Dices.length;i++){
            Dices[i]=new Dice();
        }
    }
    void slaTarningar(){
        for(int i=0;i<Dices.length;i++){
            Dices[i].role();
        }
        System.out.println ("Dice: "+ Dices[1]);
    }
    void visaTarningar(){
        String allDices="";

        for(int i=0;i<Dices.length;i++){
            allDices += ", " + Dices[i];
        }
    }
}
class Dice{
    int value;
    Dice(){
        value=0;
    }
    void role(){
        int role;
        role = (int)(Math.random()*6+1);
        value=role;
    }   
}

我得到的只是我的项目名称，还有一些奇怪的东西:

Dice: javaapplication9.Dice@9304b1 

这里出了什么问题？

Answer 1

您需要向 Dice 添加一个 toString 方法:

class Dice{
    int value;
    Dice(){
        value=0;
    }
    void role(){
        int role;
        role = (int)(Math.random()*6+1);
        value=role;
    }   

    public String toString() { 
       return "" + value + "";
    }
}

或者添加一个getValue方法:

class Dice{
    int value;
    Dice(){
        value=0;
    }
    void role(){
        int role;
        role = (int)(Math.random()*6+1);
        value=role;
    }   

    public int getValue() { 
       return value;
    }
}

//.. in other class:
System.out.println ("Dice: "+ Dices[1].getValue());