进阶day04-Objects里面的requireNonNull方法(了解)

javaSE-day05/src/com/inmind/throw02/ObjectsDemo04.java

@@ -0,0 +1,21 @@
+package com.inmind.throw02;
+
+import java.util.Objects;
+
+/*
+5.Objects里面的requireNonNull方法(了解)
+
+    JDK源码中,它也是通过throw主动抛出一个异常,而不是让JVM抛出
+ */
+public class ObjectsDemo04 {
+    public static void main(String[] args) {
+        String str = null;
+        /*if (str == null) {
+            throw new NullPointerException("str不能为null");
+        }*/
+
+        Objects.requireNonNull(str,"str不能为null");
+
+        System.out.println("程序结束");
+    }
+}