Java 常用類庫 之 Random 隨機數類實例
阿新 • • 發佈:2018-06-23
com clas CA java arraylist wan 隨機 TP array
http://www.verejava.com/?id=169931132381103
/** 知識點:Random 隨機數類 實際應用: 敵人飛機隨機從屏幕的上方出現 */ import java.util.*; public class TestRandomCard { public static void main(String[] args) { String[] cards={"A","A","A","A", "2","2","2","2", "3","3","3","3", "4","4","4","4", "5","5","5","5", "6","6","6","6", "7","7","7","7", "8","8","8","8", "9","9","9","9", "10","10","10","10", "J","J","J","J", "Q","Q","Q","Q", "K","K","K","K", "小王","大王" }; System.out.println("原牌:"); for(int i=0;i<cards.length;i++) { System.out.print(cards[i]+","); } //隨機打亂 Set set=new HashSet(); Random rn=new Random(); while(true) { set.add(rn.nextInt(54)); if(set.size()==54) { break; } } System.out.println("\n54個隨機索引號:"); Object[] iter=set.toArray(); for(int i=0;i<iter.length;i++) { System.out.print(iter[i]+","); } List zhanshan=new ArrayList(); List lisi=new ArrayList(); List wangwu=new ArrayList(); } }
http://www.verejava.com/?id=169931132381103
Java 常用類庫 之 Random 隨機數類實例