java Vector
public static void main(String[] args){ Vector v = new Vector(); // 增 v.addElement(111); v.addElement(222); v.addElement(333); v.addElement("aaa"); v.addElement("bbb"); v.addElement("ccc"); v.add(0, "zero"); System.out.println(v); // 删 v.remove(Integer.valueOf(111)); System.out.println(v); v.remove(1); System.out.println(v); // 改 v.set(0, "零"); System.out.println(v); // 查 System.out.println(v.get(0)); // 遍历 for(int i = 0; i < v.size(); i++){ System.out.println(v.get(i)); } System.out.println("------------"); for(Object o : v){ System.out.println(o); } }