feat: Java 抽象类，Java 多态

niumoo · niumoo · commit e61accd3ad93 · 2023-04-18T14:05:29.000+08:00
diff --git a/README.md b/README.md
@@ -45,6 +45,8 @@
 - [Java StringBuilder](https://www.wdbyte.com/java/java-stringbuilder/)
 - [Java 继承](https://www.wdbyte.com/java/extends/)
 - [Java 接口](https://www.wdbyte.com/java/interface/)
+- [Java 抽象类](https://www.wdbyte.com/java/abstract/)
+- [Java 多态](https://www.wdbyte.com/java/polymorphism/)
 
 ## 🌿 SpringBoot 2.x 教程
 
