From 08573354af96f6d551f642f5a1790cd96b76c983 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Mon, 3 Aug 2026 16:54:07 +0800
Subject: [PATCH] =?UTF-8?q?s-day05-Objects=E9=87=8C=E9=9D=A2=E7=9A=84requi?=
 =?UTF-8?q?reNonNull=E6=96=B9=E6=B3=95(=E4=BA=86=E8=A7=A3)?=
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---
 .../src/com/inmind/exception01/Demo04.java    | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 s-day05/src/com/inmind/exception01/Demo04.java

diff --git a/s-day05/src/com/inmind/exception01/Demo04.java b/s-day05/src/com/inmind/exception01/Demo04.java
new file mode 100644
index 0000000..fd7c71d
--- /dev/null
+++ b/s-day05/src/com/inmind/exception01/Demo04.java
@@ -0,0 +1,25 @@
+package com.inmind.exception01;
+
+import java.util.Objects;
+
+/*
+Objects里面的requireNonNull方法(了解)
+static <T> T requireNonNull(T obj) 检查指定的对象引用不是 null 。
+
+JDK源码中，它也使用通过throw主动抛出一个异常，而不是让JVM抛出
+
+总结，该API就是提醒大家，要自己抛出异常，那就用throw关键字
+ */
+public class Demo04 {
+    public static void main(String[] args) {
+        //判断一个引用数据类型，是否是null，如果是则抛出一个NullPointerException异常
+        String s = null;
+        /*if (s == null) {
+            //自己主动抛出空指针异常
+            throw new NullPointerException("s的值不能是null");
+        }
+*/
+        Objects.requireNonNull(s, "s的值不能是null");
+        System.out.println("程序结束");
+    }
+}