From 80a577d473819ee295886e72d966571d7d0eedbb Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Tue, 10 Mar 2026 16:42:42 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=9B=E9=98=B6day06-Consumer=E7=9A=84andThe?=
 =?UTF-8?q?n=E6=96=B9=E6=B3=95?=
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---
 .../inmind/functional_interface02/Demo06.java | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 javaSE-day07/src/com/inmind/functional_interface02/Demo06.java

diff --git a/javaSE-day07/src/com/inmind/functional_interface02/Demo06.java b/javaSE-day07/src/com/inmind/functional_interface02/Demo06.java
new file mode 100644
index 0000000..4fb4725
--- /dev/null
+++ b/javaSE-day07/src/com/inmind/functional_interface02/Demo06.java
@@ -0,0 +1,41 @@
+package com.inmind.functional_interface02;
+
+import java.util.function.Consumer;
+
+/*
+    学习内容：
+    default Consumer<T> andThen(Consumer after) 返回一个组成的 Consumer ，依次执行此操作，然后执行 after操作
+
+    需求：我要使用消费者接口，对同一个字符串进行大写，和小写的消费操作
+    分析：
+        1.一个消费者的消费操作：对字符串进行小写打印
+        2.另一个消费者的消费操作：对字符串进行大写打印
+ */
+public class Demo06 {
+    public static void main(String[] args) {
+        String str = "aBcD";
+
+        print(
+                s1-> System.out.println(s1.toLowerCase()),
+                s2-> System.out.println(s2.toUpperCase()),
+                str
+        );
+    }
+
+    public static void print(Consumer<String> consumer1, Consumer<String> consumer2, String s) {
+        /*consumer1.accept(s);
+        consumer2.accept(s);*/
+
+        /*
+        andThen的源码：
+        default Consumer<T> andThen(Consumer<? super T> after) {
+            Objects.requireNonNull(after);
+            return (T t) -> { accept(t); after.accept(t); };
+        }
+
+        andThen:让多个消费者按顺序去消费同一个参数
+         */
+        consumer1.andThen(consumer2).andThen(consumer2).accept(s);
+    }
+
+}