arraygeneric.java

Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想

package chapter11;
import java.util.*;
public class ArrayGeneric<T>
{
	public static void listAll(List<?>[] ls)
	{
		for(List<?> obj:ls)
		{
			listAll(obj);
		}
	}
	public static void listAll(List<?> ls)
	{
		for(Object obj:ls)
		{
			System.out.println(obj);
		}
	}
	public static void main(String args[])
	{
		ArrayList arrayLs = new ArrayList();
		LinkedList linkedLs = new LinkedList();
		arrayLs.add("123");
		arrayLs.add("456");
		
		linkedLs.add("abc");
		linkedLs.add("def");
		
		List<?>[] ls = new List<?>[2];
		ls[0] = arrayLs;
		ls[1] = linkedLs;
		listAll(ls);
	}
}