集合 Collection：List / LinkedList

import java.util.ArrayList;
import java.util.LinkedList;



public class CollectionLinkedList {

 public static void main(String[] args) {
  ArrayList <Integer> aryList = new ArrayList<>();
  System.out.println("亂數取出 6 個號碼 (範圍 1 到 46)");
  for (int i =1;i <= 6; i++){
   while(true){
    int num = (int) (Math.random() * 46) + 1;
    if (aryList.add(num)){
     System.out.println("第 "+ i + " 個號碼" + num);
     break;
    }
   }
  }
  
  LinkedList <Integer> queue = new LinkedList <>(aryList);
  System.out.println("取出佇列 (以先進先出)：");
  for(int j  = queue.size() - 1; j >= 0; j--){
   System.out.print(queue.getFirst() + " ");
   queue.removeFirst();
  }
  System.out.println();
  
  LinkedList <Integer> stack = new LinkedList <>(aryList);
  System.out.println("取出堆疊 (以後進先出)：");
  while (true){
   System.out.print(stack.removeLast() + " ");
   if(stack.isEmpty())
    break;
  }
  System.out.println();
 }

}

執行結果