queue.java

基础性的JAVA源代码

package exec.day1002;
import java.util.*;
public class Queue<A> implements Iterable{
	private LinkedList<A> list;
	public Queue(){
		list = new LinkedList<A>();
	}
	public void in(A a){
		list.add(a);
	}
	public A out(){
		return list.remove(0);
	}
	
	public Iterator<A> iterator(){
		return list.iterator();
//		return new MyIterator();
	}
	
	class MyIterator implements Iterator{
		private int i;
		public boolean hasNext(){
			return i<list.size();
		}
		public Object next(){
			i++;
			return list.get(i-1);
		}
		public void remove(){
			list.remove(i-1);
		}
	}
	
	public static void main(String args[]){
		Queue<String> q = new Queue<String>();
		q.in("hello");
//		q.in(new Integer(100));
		Iterator<String> it = q.iterator();
		while(it.hasNext()){
			System.out.println(it.next());
		}
		for(Object obj:q){
			//....
		}
//		for(String s:q){
//			
//		}
	}
}