diff --git a/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/PropertiesLauncher.java b/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/PropertiesLauncher.java
old mode 100644
new mode 100755
index 7bc2911fa7..059a9be1e6
--- a/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/PropertiesLauncher.java
+++ b/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/PropertiesLauncher.java
@@ -536,11 +536,8 @@ public class PropertiesLauncher extends Launcher {
 		return builder.toString();
 	}
 
-	private static Object capitalize(String str) {
-		StringBuilder sb = new StringBuilder(str.length());
-		sb.append(Character.toUpperCase(str.charAt(0)));
-		sb.append(str.substring(1));
-		return sb.toString();
+	private static String capitalize(String str) {
+		return Character.toUpperCase(str.charAt(0)) + str.substring(1);
 	}
 
 	private void log(String message) {