init

day01/src/com/inmind/test07/Test6.java

@@ -0,0 +1,80 @@
+package com.inmind.test07;
+
+import java.util.ArrayList;
+import java.util.Random;
+
+public class Test6 {
+    public static void main(String[] args) {
+        int n = 15;
+        ArrayList<Card> cards = randomCard(n);
+
+        if (cards != null) {
+            System.out.println("随机"+ n +"张牌:" );
+            for (int i = 0; i < cards.size(); i++) {
+                Card card = cards.get(i);
+                card.showCard();
+            }
+        }else {
+            System.out.println(n+"超越范围,无法获取牌" );
+        }
+
+        /*System.out.println();
+        System.out.println();
+        int n2 = 55;
+        ArrayList<Card> cards2 = randomCard(n2);
+
+        if (cards2 != null) {
+            System.out.println("随机"+ n2 +"张牌:" );
+            for (int i = 0; i < cards.size(); i++) {
+                Card card = cards.get(i);
+                card.showCard();
+            }
+        }else {
+            System.out.println("随机"+ n2 +"张牌:\r\n超越范围,无法获取" );
+        }*/
+    }
+    public static ArrayList<Card> randomCard(int n) {
+        if (n > 54 || n < 0)
+            return null;
+
+        ArrayList<Card> rList = new ArrayList<>();
+        ArrayList<Card> cards = allCard();
+
+        Random r = new Random();
+        for (int i = 0; i < n; i++) {
+            int index = r.nextInt(cards.size());
+            Card rCard = cards.remove(index);
+            rList.add(rCard);
+        }
+        return rList;
+    }
+
+    public static ArrayList<Card> allCard() {
+        ArrayList<Card> allList = new ArrayList<>();
+        // 花色数组
+        String[] hs = {"黑桃", "红桃", "梅花", "方片"};
+        // 点数数组
+        String[] ds = {"A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"};
+
+        for (int H = 0; H < hs.length; H++) {
+            for (int d = 0; d < ds.length; d++) {
+                Card card = new Card(hs[H], ds[d]);
+                // 添加到集合
+                allList.add(card);
+            }
+        }
+        return allList;
+    }
+}
+
+class Card {
+    private String ds; // 点数
+    private String hs; // 花色
+    public Card(String ds, String hs) {
+        this.ds = ds;
+        this.hs = hs;
+    }
+    public void showCard() {
+        System.out.print(ds + hs+" ");
+    }
+}