Java Vector class
Vector’s unique functions
Vector appears earlier, earlier than collections
1: Add functions
public void addElement(Object obj);//用add()替代
2: Get the function
public Object elementAt(int index);//用get()替代 public Enumeration elements();//返回的是实现类的对象,用Iterator iterator()
import java.util.Enumeration; import java.util.Vector; /* * Vector的特有功能 * * Vector出现较早,比集合更早出现 * * 1:添加功能 * public void addElement(Object obj);//用add()替代 * * 2:获取功能 * public Object elementAt(int index);//用get()替代 * public Enumeration elements();//返回的是实现类的对象,用Iterator iterator() * */ public class IntegerDemo { public static void main(String[] args) { // TODO Auto-generated method stub Vector v = new Vector(); v.addElement("hello"); v.addElement("world"); v.addElement("java"); for (int i = 0; i < v.size(); i++) { String s = (String) v.elementAt(i); System.out.println(s); } System.out.println("---------------"); for (Enumeration en = v.elements(); en.hasMoreElements();) { String s = (String) en.nextElement();// 返回的是实现类的对象 System.out.println(s); } } }
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