From 7520b05152a4ee01290c578d6e614c4d3b4060a8 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 18 Jul 2026 12:00:05 +0800
Subject: [PATCH] =?UTF-8?q?day04-=E6=96=B9=E6=B3=95=5F=E5=AE=9A=E4=B9=89?=
 =?UTF-8?q?=E6=B3=A8=E6=84=8F=E4=BA=8B=E9=A1=B9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 day04/src/com/inmind/method/Demo02.java |  1 +
 day04/src/com/inmind/method/Demo03.java | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 day04/src/com/inmind/method/Demo03.java

diff --git a/day04/src/com/inmind/method/Demo02.java b/day04/src/com/inmind/method/Demo02.java
index 2bd370f..e1ac137 100644
--- a/day04/src/com/inmind/method/Demo02.java
+++ b/day04/src/com/inmind/method/Demo02.java
@@ -20,6 +20,7 @@ public class Demo02 {
         System.out.println(sum);//6
         System.out.println("-------------------");
         printN(10);
+        System.out.println("程序结束");
     }
 
 
diff --git a/day04/src/com/inmind/method/Demo03.java b/day04/src/com/inmind/method/Demo03.java
new file mode 100644
index 0000000..3fdecaa
--- /dev/null
+++ b/day04/src/com/inmind/method/Demo03.java
@@ -0,0 +1,25 @@
+package com.inmind.method;
+/*
+学习方法的注意事项
+1.方法要定义在类中方法外
+2.当方法的返回值类型为void的时候，需要写return？不需要。
+  可以写return？可以,但是return之后不能跟任何数据，只能写return;
+3.return:结束方法，跟是否返回方法的调用处无关，只要方法结束了一定返回方法调用处
+4.在一个方法中可以写多个return吗？
+    可以，但是只能有一个return被调用
+ */
+public class Demo03 {
+    public static void main(String[] args) {
+        int a = 0;
+        if (a > 10) {
+            return;
+        } else if (a > 3 && a <= 10) {
+            System.out.println("a的值在3~10之间");
+            return;
+        } else {
+            System.out.println("a的值小于等于3");
+        }
+
+        System.out.println("程序结束");
+    }
+}