From b75c027607544fb1ceca87f540696a8c0507fcb7 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Tue, 20 Jan 2026 11:06:21 +0800
Subject: [PATCH] =?UTF-8?q?day07-=E5=B8=B8=E7=94=A8=E7=B1=BB-ArrayList-?=
 =?UTF-8?q?=E6=93=8D=E4=BD=9C=E7=BB=83=E4=B9=A0?=
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---
 day07/src/com/inmind/arraylist03/Test11.java | 29 +++++++++++++++++
 day07/src/com/inmind/arraylist03/Test12.java | 33 ++++++++++++++++++++
 2 files changed, 62 insertions(+)

diff --git a/day07/src/com/inmind/arraylist03/Test11.java b/day07/src/com/inmind/arraylist03/Test11.java
index 26dcd2d..3b90dc7 100644
--- a/day07/src/com/inmind/arraylist03/Test11.java
+++ b/day07/src/com/inmind/arraylist03/Test11.java
@@ -1,8 +1,37 @@
 package com.inmind.arraylist03;
+
+import java.util.ArrayList;
+
 /*
 ArrayList_练习1_指定格式拼接字符串
 定义以指定格式打印集合的方法(ArrayList类型作为参数)，使用@分隔每个元素。
 格式参照: [元素@元素@元素]。
  */
 public class Test11 {
+    public static void main(String[] args) {
+        ArrayList<String> lists = new ArrayList<>();
+        lists.add("白鹿");
+        lists.add("王宝强");
+        lists.add("杨幂");
+        lists.add("迪丽热巴");
+
+        String result = showArrayList(lists);
+        System.out.println(result);
+    }
+
+    public static String showArrayList(ArrayList<String> list) {
+        String result = "[";
+        for (int i = 0; i < list.size(); i++) {
+            String temp = list.get(i);//集合中的每个元素
+
+            if (i == list.size() - 1) {
+                result = result + temp + "]";
+            } else {
+//                result = result + temp + "@";
+                result += temp + "@";
+            }
+        }
+
+        return result;
+    }
 }
diff --git a/day07/src/com/inmind/arraylist03/Test12.java b/day07/src/com/inmind/arraylist03/Test12.java
index 82137e8..847016f 100644
--- a/day07/src/com/inmind/arraylist03/Test12.java
+++ b/day07/src/com/inmind/arraylist03/Test12.java
@@ -1,4 +1,7 @@
 package com.inmind.arraylist03;
+
+import java.util.ArrayList;
+
 /*
 常用类_ArrayList_练习2_获取偶数集合
 有一个原本的集合，该集合中有正整数，1,3,4,5,8,9
@@ -7,4 +10,34 @@ package com.inmind.arraylist03;
 实现方式要有2种：1.创建新集合实现   2.不创建新集合实现
  */
 public class Test12 {
+    public static void main(String[] args) {
+        ArrayList<Integer> lists = new ArrayList<>();
+        lists.add(1);
+        lists.add(2);
+        lists.add(3);
+        lists.add(3);
+        lists.add(4);
+        //1.创建新集合实现获取偶数
+        ArrayList<Integer> newList = new ArrayList<>();
+        for (int i = 0; i < lists.size(); i++) {
+            Integer temp = lists.get(i);
+            if (temp % 2 == 0) {//判断每个元素是否是偶数，是则添加到新集合
+                newList.add(temp);
+            }
+        }
+        System.out.println(newList);
+        System.out.println("--------------------");
+        //2.不创建新集合实现,将原本的集合中的奇数，删除掉即可！！！
+        for (int i = 0; i < lists.size(); i++) {
+            Integer temp = lists.get(i);//每个元素
+            if (temp % 2 == 1) {
+                //是奇数，就删除
+                lists.remove(i);
+                //在集合删除时，一定要让索引倒退1，才不会漏掉任何一个值
+                i--;
+            }
+        }
+
+        System.out.println(lists);
+    }
 }