From 23485228102c30e05ad7d31c68f8b59065e54ff7 Mon Sep 17 00:00:00 2001
From: Fuku-L <38535911+Fuku-L@users.noreply.github.com>
Date: Thu, 23 Feb 2023 23:34:24 +0800
Subject: [PATCH] doc: Update java.md (#311)
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添加List和Set集合中打印时使用lamba输出的方式。
---
 docs/java.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/java.md b/docs/java.md
index daaa91d..251e72c 100644
--- a/docs/java.md
+++ b/docs/java.md
@@ -595,6 +595,8 @@ nums.remove(0); // 非常慢
 for (Integer value : nums) {
     System.out.println(value);
 }
+// lambda 打印元素
+nums.forEach(e -> System.out.println(e.toString()));
 ```
 
 ### HashMap
@@ -653,6 +655,7 @@ set.remove("cat");
 for (String element : set) {
     System.out.println(element);
 }
+set.forEach(e -> System.out.println(e.toString()));
 ```
 
 ### ArrayDeque