From 87fa2c3b97c7ee4785c4109ebd14ff3310f9db11 Mon Sep 17 00:00:00 2001
From: Johnny Lim <izeye@naver.com>
Date: Sat, 18 Apr 2020 01:44:16 +0900
Subject: [PATCH] Avoid unnecessary String instantiation in
 StringUtils.deleteAny()

This commit avoids unnecessary String instantiation in
StringUtils.deleteAny() if nothing was deleted from the
input string.

Closes gh-24924
---
 .../src/main/java/org/springframework/util/StringUtils.java    | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/spring-core/src/main/java/org/springframework/util/StringUtils.java b/spring-core/src/main/java/org/springframework/util/StringUtils.java
index 9fe0fcd4af..5eb623f94a 100644
--- a/spring-core/src/main/java/org/springframework/util/StringUtils.java
+++ b/spring-core/src/main/java/org/springframework/util/StringUtils.java
@@ -461,6 +461,9 @@ public abstract class StringUtils {
 				result[lastCharIndex++] = c;
 			}
 		}
+		if (lastCharIndex == inString.length()) {
+			return inString;
+		}
 		return new String(result, 0, lastCharIndex);
 	}