From 3ece74458997df8d22c0ea8e74cd29d8d364e858 Mon Sep 17 00:00:00 2001 From: xuxin <840198532@qq.com> Date: Sat, 31 Jan 2026 15:35:46 +0800 Subject: [PATCH] =?UTF-8?q?=E8=BF=9B=E9=98=B6day02-List=E6=8E=A5=E5=8F=A3?= =?UTF-8?q?=E7=9A=84=E7=89=B9=E7=82=B9?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../src/com/inmind/list01/ListDemo01.java | 42 +++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 javaSE-day03/src/com/inmind/list01/ListDemo01.java diff --git a/javaSE-day03/src/com/inmind/list01/ListDemo01.java b/javaSE-day03/src/com/inmind/list01/ListDemo01.java new file mode 100644 index 0000000..f78cbea --- /dev/null +++ b/javaSE-day03/src/com/inmind/list01/ListDemo01.java @@ -0,0 +1,42 @@ +package com.inmind.list01; + +import java.util.ArrayList; +import java.util.List; + +/* +List接口是单列集合Collection接口的子接口 + 1.List接口的特点 + a.存取有序 + b.有索引 + c.可以重复 + + 2.List接口的常用的实现类 + ArrayList Linkedlist + + 3.List接口是Collection接口的子接口,所以昨天学习的所有的Collection的常用方法,它都能用 + */ +public class ListDemo01 { + public static void main(String[] args) { + //创建List集合 + List lists = new ArrayList<>(); + lists.add("刘备"); + lists.add("关羽"); + lists.add("张飞"); + System.out.println(lists);//重写了toString + + lists.remove("张飞"); + System.out.println(lists); + + System.out.println(lists.contains("张飞"));//false + + System.out.println(lists.isEmpty());//false + + System.out.println(lists.size());//2 + + lists.clear(); + System.out.println(lists.size());//0 + + Object[] array = lists.toArray(); + + } +}