Java中将char类型花色字符转换为对应完整string字符串的实现问题

前置修复：现有代码隐性问题 #

• 当前Card类的type和number属性都加了static修饰符，会导致所有Card实例共享同一份属性值，抽取第二张卡时会直接覆盖第一张卡的属性，最终输出两张卡的数值和花色完全一致，需要先删除这些多余的static修饰。

花色转换实现方案 #

通过映射关系把单字符缩写对应到完整花色名即可，修改后的完整代码如下：

修改后的Card实体类 #

public class Card {
    // 去掉static修饰，每个卡牌实例有独立属性
    private char type;
    private int number;

    public char getType() {
        return type;
    }

    public void setType(char type) {
        this.type = type;
    }

    public int getNumber() {
        return number;
    }

    public void setNumber(int number) {
        this.number = number;
    }

    // 新增转换方法：返回花色完整名称
    public String getFullTypeName() {
        switch (this.type) {
            case 'c': return "Club";
            case 'h': return "Heart";
            case 'd': return "Diamond";
            case 's': return "Spade";
            default: return "Unknown";
        }
    }
}

修改后的PickTwoCards类 #

仅需要修改输出时调用的花色获取方法：

import java.util.Random;

public class PickTwoCards {
    final static int CardNumbers = 13;
    final static char[] Types = {'c','h','d','s'};

    public static void main(String args[]){
        Card CardOne = ChooseCard();
        System.out.println("*****Welcome to the House of Cards*****");
        // 调用getFullTypeName()获取完整花色名
        System.out.println("My card is the "+CardOne.getNumber()+" of "+CardOne.getFullTypeName()+".");
    
        Card CardTwo = ChooseCard();
        System.out.println("My card is the "+CardTwo.getNumber()+" of "+CardTwo.getFullTypeName()+".");
    }

    public static Card ChooseCard(){
        Card card = new Card();
        card.setType(RandomType());
        card.setNumber(RandomNumber());
        return card;
    }

    public static char RandomType(){
        int RandomTypeKeep = new Random().nextInt(Types.length);
        char RandomType = Types[RandomTypeKeep];
        return RandomType;
    }

    public static int RandomNumber(){
        int RandomCardNumber = ((int)(Math.random()*100)%CardNumbers+1);
        return RandomCardNumber;
    }
}

输出效果示例 #

*****Welcome to the House of Cards*****
My card is the 3 of Spade.
My card is the 2 of Diamond.

如果需要中文花色名，仅需要把switch分支里的返回值替换为梅花、红桃、方块、黑桃即可。

内容的提问来源于stack exchange，提问作者llillillill