From 12307cc79802ab4b5915f342686fbb0d188847bd Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Mon, 29 Dec 2025 16:30:47 +0800
Subject: [PATCH] =?UTF-8?q?day07-=E5=B8=B8=E7=94=A8=E7=B1=BB-ArrayList-?=
 =?UTF-8?q?=E7=BB=83=E4=B9=A0?=
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---
 day07/src/com/inmind/arraylist03/Demo14.java | 41 ++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/day07/src/com/inmind/arraylist03/Demo14.java b/day07/src/com/inmind/arraylist03/Demo14.java
index b839372..8095065 100644
--- a/day07/src/com/inmind/arraylist03/Demo14.java
+++ b/day07/src/com/inmind/arraylist03/Demo14.java
@@ -1,4 +1,7 @@
 package com.inmind.arraylist03;
+
+import java.util.ArrayList;
+
 /*
 常用类-ArrayList-练习4_获取偶数集合
 实现方式2种：
@@ -6,4 +9,42 @@ package com.inmind.arraylist03;
     2.不创建新的集合，只把原集合中不为偶数的数据删除掉即可
  */
 public class Demo14 {
+    public static void main(String[] args) {
+        //2.不创建新的集合，只把原集合中不为偶数的数据删除掉即可
+        ArrayList<Integer> integers = new ArrayList<>();
+        integers.add(2);
+        integers.add(3);
+        integers.add(3);
+        integers.add(8);
+        integers.add(6);
+
+        for (int i = 0; i < integers.size(); i++) {
+            Integer temp = integers.get(i);
+            if (temp % 2 ==1) {
+                //如果是奇数，从当前集合删除指定索引的值
+                integers.remove(i);
+                i--;//注意：但凡在集合遍历中删除，一定要加i--,避免跳过元素
+            }
+        }
+        System.out.println(integers);
+    }
+
+    //1.创建新的集合只保存偶数
+    private static void getOushu1() {
+        ArrayList<Integer> integers = new ArrayList<>();
+        integers.add(2);
+        integers.add(3);
+        integers.add(3);
+        integers.add(8);
+        integers.add(6);
+
+        ArrayList<Integer> newList = new ArrayList<>();
+        for (int i = 0; i < integers.size(); i++) {
+            Integer temp = integers.get(i);
+            if (temp % 2 == 0) {//自动拆箱
+                newList.add(temp);
+            }
+        }
+        System.out.println(newList);
+    }
 }