集合类小程序

import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;

public class CollectionTest {

    public static void main(String[] args) {
        Collection c = new HashSet();
        c.add("sunwuk");
        c.add("zhubaj");
        c.add("shas");    
        Iterator i = c.iterator();
        i.next();
        i.remove();
        while (i.hasNext()) {
            String n = (String) i.next();//next()返回类型为Object，需要转换

            System.out.print(n + " ");
        }               
    }
}