笔记备份：2025-08-19 23:17:39

.obsidian/plugins/keep-the-rhythm/data.json

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.obsidian/plugins/novel-word-count/data.json

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A1-Work/语言/Java/基础学习.md

@@ -356,7 +356,41 @@ assert 条件: 表达式;
 7. FINEST
 
 ## 泛型
+### 简单泛型
+```Java
+public class Pair<T> {
+    T first;
+    T second;
+    
+    Pair(T first, T second)
+    
+    T getFirst()
+    T getSecond()
+    
+    void setFirst(T newValue)
+    void setSecond(T newValue)
+}
+```
 
+又或者
+
+```Java
+public class Pair<T, U> {
+    T first;
+    U second;
+    
+    Pair(T first, U second)
+    
+    T getFirst()
+    U getSecond()
+    
+    void setFirst(T newValue)
+    void setSecond(U newValue)
+}
+```
+
+> [!tip] 提示
+> 在 Java 库中，常使用 `E` 表示集合元素类型，`K` 和 `V` 表示键值对，T（需要时还可以使用临近字母 `U` 和 `S`）表示“任意类型”。
 
 ## JDK 特性