import java.util.*;
class LinkedListDemo
{
	//生成隨機(jī)數(shù)
	LinkedList list;
	public LinkedListDemo()
	{
		list=new LinkedList();
		for(int i=0;i<20;i++)
		{
		 int num;
		 num=(int)(Math.random()*899+100);
		 list.add(num);
		}
	}
	void display()
	{
		Iterator iter=list.iterator();
		int count=0;
		while(iter.hasNext())
		{
			Object elem=iter.next();
			System.out.print(elem+"  ");
			count++;
			if(count%5==0)
			System.out.println();
		}
	}
	public static void main(String []args)
	{
		LinkedListDemo Linklist=new LinkedListDemo();
		Linklist.display();
	}
	
}