From 6fab5b591b7df7794177b67ca81f92b7cfd6d547 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=91=A8=E6=AD=A6=E6=A0=8B?= <wzhou1@xiaohongshu.com>
Date: Mon, 12 Aug 2019 13:52:33 +0800
Subject: [PATCH] Simplify some code

See gh-17837
---
 .../boot/devtools/filewatch/FileSystemWatcher.java             | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/filewatch/FileSystemWatcher.java b/spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/filewatch/FileSystemWatcher.java
index a22fe696eb..2182497a50 100644
--- a/spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/filewatch/FileSystemWatcher.java
+++ b/spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/filewatch/FileSystemWatcher.java
@@ -154,8 +154,7 @@ public class FileSystemWatcher {
 		synchronized (this.monitor) {
 			saveInitialSnapshots();
 			if (this.watchThread == null) {
-				Map<File, FolderSnapshot> localFolders = new HashMap<>();
-				localFolders.putAll(this.folders);
+				Map<File, FolderSnapshot> localFolders = new HashMap<>(this.folders);
 				this.watchThread = new Thread(new Watcher(this.remainingScans, new ArrayList<>(this.listeners),
 						this.triggerFilter, this.pollInterval, this.quietPeriod, localFolders));
 				this.watchThread.setName("File Watcher");