集合框架06:Vector集合使用
package com.yundait.Demo01;
import java.util.Enumeration;
import java.util.Vector;
public class VectorDemo01 {
public static void main(String[] args) {
//创建集合
Vector vector = new Vector<>();
//1.添加元素
vector.add("草莓");
vector.add("芒果");
vector.add("西瓜");
System.out.println("元素个数"+ vector.size());
//2删除元素
//vector.remove(0);
//vector.remove("西瓜");
//vector.clear();
System.out.println("删除后元素个数" + vector.size());
System.out.println(vector.toString());
//3.遍历
//使用枚举器
Enumeration elements = vector.elements();
while (elements.hasMoreElements()){
String o = (String)elements.nextElement();
System.out.println(o);
}
//4.判断
System.out.println(vector.contains("西瓜"));
System.out.println(vector.isEmpty());
//5.Vector其他方法
System.out.println("-----------------------");
System.out.println(vector.toString());
System.out.println(vector.firstElement());
System.out.println(vector.lastElement());
System.out.println(vector.elementAt(1));
}
}
原文地址:https://blog.csdn.net/zhangjinajian759/article/details/142896802
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