From 332bca3785152aeec43de7bc73fd481f5ece20f2 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sun, 2 Aug 2026 13:49:56 +0800
Subject: [PATCH] =?UTF-8?q?s-day02-=E5=8F=AF=E5=8F=98=E5=8F=82=E6=95=B0?=
 =?UTF-8?q?=E7=9A=84=E4=BD=BF=E7=94=A8?=
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---
 .../src/com/inmind/var_param03/Demo12.java    | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 s-day03/src/com/inmind/var_param03/Demo12.java

diff --git a/s-day03/src/com/inmind/var_param03/Demo12.java b/s-day03/src/com/inmind/var_param03/Demo12.java
new file mode 100644
index 0000000..35203d5
--- /dev/null
+++ b/s-day03/src/com/inmind/var_param03/Demo12.java
@@ -0,0 +1,48 @@
+package com.inmind.var_param03;
+/*
+    在jdk5中，提供可变参数，当我们要定义多个同一种类型的参数，并且，个数还不确定时，此时可以用可变参数来替代
+
+    可变参数的语法：
+    (数据类型... 参数名)
+
+    可变参数也是一个语法糖，本质不变，就是数组
+
+    注意事项：
+        1.可变参数在一个参数列表中只能出现一次
+        2.如果有多个参数，可变参数必须在最后一个
+ */
+public class Demo12 {
+    public static void main(String[] args) {
+        System.out.println(getSum(1));
+        //计算2个整数的和
+        System.out.println(getSum(1,2));
+        //计算3个整数的和
+        System.out.println(getSum(1,2,3));
+        //计算4个整数的和
+        System.out.println(getSum(1,2,3,4));
+        System.out.println(getSum(1,2,3,4,5));
+    }
+
+    public static int getSum(int... arr) {
+        int sum = 0;
+        /*for (int i = 0; i < arr.length; i++) {
+            sum += arr[i];
+        }*/
+        for (int i : arr) {
+            sum += i;
+        }
+
+        return  sum;
+    }
+
+
+    /*public static int getSum(int i, int j) {
+        return i + j;
+    }
+    public static int getSum(int i, int j,int k) {
+        return i + j+k;
+    }
+    public static int getSum(int i, int j,int k ,int m) {
+        return i + j+k+m;
+    }*/
+}