notejava 7.3

public class ListTest {

	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
          List list=new ArrayList();
          list.add("math");
          list.add("english");
          list.add("music");
          System.out.println(list);
          System.out.println("english索引是"+list.indexOf("english"));
          list.add(1,"art");//根据索引插入
          System.out.println(list);
          list.set(2,"physical");
          System.out.println(list);
          list.remove(0);
          System.out.println(list);
          
	}

}

public class ListIteratorTest {

	
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		List books=new ArrayList();
		books.add("english");
		books.add("math");
		books.add("art");
		ListIterator iterator=books.listIterator(3);
		while(iterator.hasPrevious())
		{
			String x=(String) iterator.previous();
			System.out.println(x);
		}
		
		
	}

}