IterableLinkList.java

package BaseType;

import java.util.Iterator;

public class IterableLinkList<T> extends SimpleLinkList<T> implements Iterable<T> {

	// Iterable support
	public Iterator<T> iterator(){
		// 所谓的返回匿名类
		return new Iterator<T>(){
			private int cur = 0;

			@Override
			public boolean hasNext() {
				return this.cur < IterableLinkList.this.size();
			}

			@Override
			public T next() {
				try {
					return IterableLinkList.this.indexOf(this.cur++);
				} catch (Exception e) {
					e.printStackTrace();
				}
				return null;
			}

			@Override
			public void remove() {
				try {
					IterableLinkList.this.remove(this.cur-1);
					this.cur--;
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
			
		};
	}
	
	// for test
	private static void print_list(SimpleLinkList mylist, String msg) throws Exception{
		System.out.println("======= " + msg + " =====" + mylist.size());
		for(int i=0; i<mylist.size(); ++i){
			System.out.println(mylist.indexOf(i));
		}
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {

		// test for iterator support
		IterableLinkList<String> mylist = new IterableLinkList<String>();
		for(int i=0; i<10; ++i){
			mylist.add(new String(Integer.toString(i)));
		}
		System.out.println("======================== traversal");
		for(String data : mylist){
			System.out.println(data);
		}
		System.out.println("======================== remove");
		for(Iterator itr = mylist.iterator(); itr.hasNext();){
			itr.next();
			itr.remove();
		}
		for(String data : mylist){
			System.out.println(data);
		}
		assert(mylist.size() > 0);
		System.out.println("remove test ok!");
	}

}