我试图创建一个类,在一种方法中,创建卡片组,在另一种方法中,我希望它将卡片洗牌1000次,然后打印到控制台。 (这是我老师告诉他做的一个实验室) 我的问题是我在 CardDeck 方法中创建了数组,我无法在该方法之外访问它们。我正在寻找一个对编程新手来说很简单的答案可以理解,并应用到我当前的代码中。 此程序是用java编写的。
import java.util.Random;
public class Deck {
public static void main(String args[]) {
// mah lovely arrays ^.^
CardDeck();
Random random = new Random();
for (int q = 0; q < 52; q++) {
int rand = random.nextInt(52);
}
}
public static void CardDeck() {
final String[] deckSuit = new String[52];
String[] deckKind = new String[52];
int[] deckValue = new int[52];
String spade = "Spades";
String diamond = "Diamonds";
String heart = "Hearts";
String club = "Clubs";
// set the respective suits
for (int q = 0; q < 13; q++) {
deckSuit[q] = spade;
}
for (int q = 13; q < 26; q++) {
deckSuit[q] = diamond;
}
for (int q = 26; q < 39; q++) {
deckSuit[q] = heart;
}
for (int q = 39; q < 52; q++) {
deckSuit[q] = club;
}
// set the kind of card
for (int q = 0; q < 52; q += 13) {
deckKind[q] = "Two";
deckKind[q + 1] = "Three";
deckKind[q + 2] = "Four";
deckKind[q + 3] = "Five";
deckKind[q + 4] = "Six";
deckKind[q + 5] = "Seven";
deckKind[q + 6] = "Eight";
deckKind[q + 7] = "Nine";
deckKind[q + 8] = "Ten";
deckKind[q + 9] = "Jack";
deckKind[q + 10] = "Queen";
deckKind[q + 11] = "King";
deckKind[q + 12] = "Ace";
}
for (int q = 0; q < 52; q += 13) {
deckValue[q] = 2;
deckValue[q + 1] = 3;
deckValue[q + 2] = 4;
deckValue[q + 3] = 5;
deckValue[q + 4] = 6;
deckValue[q + 5] = 7;
deckValue[q + 6] = 8;
deckValue[q + 7] = 9;
deckValue[q + 8] = 10;
deckValue[q + 9] = 10;
deckValue[q + 10] = 10;
deckValue[q + 11] = 10;
deckValue[q + 12] = 11;
}
//display all the cards
for (int q = 0; q < 52; q++) {
System.out.println("[" + deckSuit[q] + ", " + deckKind[q] + ", " + deckValue[q] + "]");
}
}
//declare ye methods here
}
答案 0 :(得分:0)
几个解决方案
make array static public
从函数
答案 1 :(得分:0)
因为你在CardDeck方法中创建/声明了数组,所以&#39;为什么你不能在那种方法之外使用。
你可以将数组声明为实例变量并在CardDeck()方法中初始化。
答案 2 :(得分:0)
第一种解决方案是在更高的范围内声明您的变量。您可以在Deck类中创建一个静态成员,该成员可以通过任何静态方法访问(在本例中为main()
和CardDeck()
),或者您可以在main()
方法中创建变量,将其作为CardDeck(String[])
方法的参数传递。
但我认为更好的解决方案是将CardDeck()
方法的原型更改为String[] createDeck()
。该方法首先创建甲板,然后返回它。在main()
方法中,然后将返回的值存储在可以在for循环中使用的本地String[]
中。
答案 3 :(得分:-1)
您的括号格式不正确。你在`public static void CardDeck()上面有一个额外的大括号。
固定代码:
import java.util.Random;
public class Deck {
public static void main(String args []){
// mah lovely arrays ^.^
CardDeck();
Random random = new Random();
for(int q = 0;q<52;q++){
int rand = random.nextInt(52);
}
}
public static void CardDeck(){
final String[] deckSuit = new String[52];
String[] deckKind = new String[52];
int[] deckValue = new int[52];
String spade = "Spades";
String diamond = "Diamonds";
String heart = "Hearts";
String club = "Clubs";
// set the respective suits
for(int q = 0;q<13;q++){
deckSuit[q] = spade;
}
for(int q = 13;q<26;q++){
deckSuit[q] = diamond;
}
for(int q = 26;q<39;q++){
deckSuit[q] = heart;
}
for(int q = 39;q<52;q++){
deckSuit[q] = club;
}
// set the kind of card
for(int q = 0;q<52;q+=13){
deckKind[q] = "Two";
deckKind[q+1] = "Three";
deckKind[q+2] = "Four";
deckKind[q+3] = "Five";
deckKind[q+4] = "Six";
deckKind[q+5] = "Seven";
deckKind[q+6] = "Eight";
deckKind[q+7] = "Nine";
deckKind[q+8] = "Ten";
deckKind[q+9] = "Jack";
deckKind[q+10] = "Queen";
deckKind[q+11] = "King";
deckKind[q+12] = "Ace";
}
for(int q = 0;q<52;q+=13){
deckValue[q] = 2;
deckValue[q+1] = 3;
deckValue[q+2] = 4;
deckValue[q+3] = 5;
deckValue[q+4] = 6;
deckValue[q+5] = 7;
deckValue[q+6] = 8;
deckValue[q+7] = 9;
deckValue[q+8] = 10;
deckValue[q+9] = 10;
deckValue[q+10] = 10;
deckValue[q+11] = 10;
deckValue[q+12] = 11;
}
//display all the cards
for(int q = 0;q<52;q++){
System.out.println("["+deckSuit[q]+", "+deckKind[q]+", "+deckValue[q]+"]");
}
//declare ye methods here
}
}