Use computeIfAbsent in CommandLineArgs.addOptionArg

Signed-off-by: junhyung8795 <junhyung8795@naver.com>

Author: junhyung8795

spring-core/src/main/java/org/springframework/core/env/CommandLineArgs.java

@@ -46,11 +46,9 @@ class CommandLineArgs {
 	 * without an associated value — for example, "--foo" vs. "--foo=bar".
 	 */
 	public void addOptionArg(String optionName, @Nullable String optionValue) {
-		if (!this.optionArgs.containsKey(optionName)) {
-			this.optionArgs.put(optionName, new ArrayList<>());
-		}
+		List<String> values = this.optionArgs.computeIfAbsent(optionName, key -> new ArrayList<>());
 		if (optionValue != null) {
-			this.optionArgs.get(optionName).add(optionValue);
+			values.add(optionValue);
 		}
 	}